Blockchain works like a shared digital notebook that thousands of computers hold simultaneously. When a new transaction happens, it is broadcast to all those computers. They verify it is legitimate, group it with other recent transactions into a ‘block’, and add that block to the existing chain of blocks. Once added, the block is sealed with a unique code (a cryptographic hash) and cannot be changed without changing every block that came after it — which is practically impossible. That is what makes blockchain secure and trustworthy without needing a central authority like a bank.
Blockchain is one of those technologies that sounds complicated until someone explains it simply — and then it suddenly makes perfect sense.
In this guide, we explain exactly how blockchain technology works in plain language — step by step, from a single transaction to a global network of verified records. We cover the structure of a block, how data is stored, how different consensus mechanisms work, the four types of blockchain, and the real-world use cases driving enterprise adoption in 2026.
Whether you are a business owner evaluating blockchain for your organisation, a developer learning the fundamentals, or simply curious how this technology actually works — this guide gives you a clear, complete, and up-to-date answer.
If you want to start with the absolute basics first, read our beginner’s introduction to what is blockchain technology before continuing. For those ready to dive into how it actually works — let us begin.
- What Is Blockchain Technology in Simple Terms?
- Blockchain Data Storage Explained: What Is Inside a Block?
- How Blockchain Works Step by Step: A Transaction Walkthrough
- Consensus Mechanisms Explained: How Blockchain Networks Agree
- 4 Types of Blockchain Networks — and When to Use Each
- What Are Smart Contracts and How Do They Work on Blockchain?
- Blockchain vs Traditional Database: Key Differences
- Real-World Blockchain Use Cases in 2026 — Across Every Industry
- How to Use Blockchain Technology for Your Business — Getting Started
- Blockchain Technology Trends to Watch in 2026 and Beyond
- Conclusion: Blockchain Technology in 2026 — From Theory to Infrastructure
- Frequently Asked Questions About How Blockchain Works
What Is Blockchain Technology in Simple Terms?
Imagine a Google spreadsheet — but instead of living on Google’s servers, it lives simultaneously on thousands of computers around the world. Everyone on the network can see it. But no single person or company controls it. And once something is written into it, it cannot be edited or erased.
That is essentially what blockchain is: a shared, distributed digital ledger that records transactions or data in a series of connected blocks, maintained by a decentralised network of computers (called nodes). Each block is cryptographically sealed and linked to the one before it, forming an unbreakable chain of records.
The three properties that make blockchain genuinely revolutionary are:
- Decentralisation — no single authority owns or controls the data. It is distributed across thousands of nodes worldwide.
- Immutability — once a record is added to the blockchain, it cannot be altered or deleted without the consensus of the entire network.
- Transparency — all participants in the network can verify transactions independently, without needing to trust a central intermediary.
Blockchain Data Storage Explained: What Is Inside a Block?
To understand how blockchain works, you first need to understand what a block actually is and what it contains. Think of each block as a page in a ledger — it has a fixed structure, a fixed capacity, and once it is full and sealed, it cannot be changed.
| Block Component | What It Contains | What It Contains |
|---|---|---|
| Block Index | Sequential position number in the chain | Establishes order and chain continuity |
| Timestamp | Date and time the block was created | Creates immutable chronological record |
| Transaction Data | All transactions or records in this block | The actual payload — the reason the block exists |
| Previous Block Hash | Cryptographic fingerprint of the prior block | Cryptographic fingerprint of the prior block |
| Current Block Hash | Cryptographic fingerprint of this block | Seals this block's data permanently |
| Nonce | Random number used in mining | Proof of work — the 'puzzle' miners solve |
| Merkle Root | Summary hash of all transactions in the block | Summary hash of all transactions in the block |
What is a cryptographic hash?
A cryptographic hash is a fixed-length string of characters generated from any amount of input data using a mathematical function (such as SHA-256, used by Bitcoin). The same input always produces the same hash. But change even one character of the input — a single letter, a single digit — and the hash changes completely. This is what makes blockchain tamper-proof.
Every block contains the hash of the previous block. This is what creates the ‘chain’ in blockchain. If you try to alter a transaction in block 500, its hash changes. That breaks block 501, which held the old hash. Block 501’s hash then changes, breaking block 502. And so on — all the way to the current block. To successfully alter history, you would need to recalculate the entire chain faster than the honest network is adding new blocks. On Bitcoin, that would require controlling more than 50% of the entire network’s computing power — a practically impossible undertaking.
What is a Merkle Tree?
Inside each block, all the transactions are organised into a data structure called a Merkle Tree. Each transaction is hashed, then pairs of hashes are hashed together, then pairs of those hashes are hashed together, until you arrive at a single hash that represents all the transactions in the block — called the Merkle Root. This allows any individual transaction to be verified quickly without downloading the entire block’s data.
Data storage insight: On the Bitcoin blockchain, each block has a maximum size of approximately 1 MB and is added to the chain roughly every 10 minutes. Ethereum blocks are added every 12 seconds. Layer-2 networks built on top of these base chains can process thousands of transactions per second — solving the scalability limitation that older blockchain architectures faced.
How Blockchain Works Step by Step: A Transaction Walkthrough
Here is exactly what happens when a transaction is made on a blockchain network — from initiation to permanent record. We will use a financial transaction as the example, but the same process applies to any data recorded on a blockchain, whether that is a medical record, a property title, or a supply chain event.
1. A transaction is initiated
A user initiates a transaction — for example, sending 1 Bitcoin to another person. This transaction is created as a digital message containing the sender’s address, the recipient’s address, the amount, and a digital signature created using the sender’s private cryptographic key. The digital signature proves the sender authorised the transaction without revealing their private key.
2. The transaction is broadcast to the network
The transaction is broadcast to a peer-to-peer network of thousands of computers (nodes). Each node receives a copy of the transaction and adds it to a temporary pool of unconfirmed transactions called the ‘mempool’ (memory pool).
3. Nodes validate the transaction
Each node independently validates the transaction against the network’s rules: Does the sender have sufficient funds? Is the digital signature valid? Has this transaction already been processed (preventing double-spending)? Transactions that fail validation are rejected. Valid transactions remain in the mempool awaiting inclusion in a block.
4. Transactions are grouped into a new block
Miners (on Proof of Work networks) or validators (on Proof of Stake networks) select a batch of valid transactions from the mempool and assemble them into a new candidate block. The block includes a header containing the previous block’s hash, a timestamp, a Merkle Root of all selected transactions, and a nonce value.
5. The consensus process occurs
This is the step that makes blockchain trustworthy without a central authority. The network uses a consensus mechanism — most commonly Proof of Work or Proof of Stake — to agree on which block gets added next. On Proof of Work networks like Bitcoin, miners compete to solve a complex mathematical puzzle. The first miner to solve it broadcasts their solution to the network. Other nodes verify the solution (verification is fast even though finding the answer is slow) and accept the block if it is valid.
6. The block is added to the chain
Once the network reaches consensus, the winning block is added to the blockchain — appended to the end of the existing chain. The block is assigned its hash, which incorporates the previous block’s hash, sealing it cryptographically to the chain. The miner or validator who won the consensus process receives a reward (new cryptocurrency and/or transaction fees).
7. The transaction is confirmed and permanent
The transaction is now part of the blockchain — permanently recorded, visible to all participants, and cryptographically sealed. Every subsequent block that is added on top of it makes it more secure. On Bitcoin, a transaction is considered fully confirmed after six blocks have been added on top of it — meaning six separate rounds of consensus have validated the chain containing that transaction. At that point, reversing it is computationally impossible.
1. You initiate a transaction.
2. It is broadcast to a network of thousands of computers.
3. Those computers validate it is legitimate.
4. Valid transactions are grouped into a block.
5. The network agrees (via consensus) to accept the block.
6. The block is added to the chain with a permanent, tamper-proof seal.
7. The transaction is complete and cannot be reversed or altered.
Consensus Mechanisms Explained: How Blockchain Networks Agree
The consensus mechanism is the engine of a blockchain — it is the process by which thousands of independent computers, with no central coordinator, agree on what the truth is. Different blockchains use different consensus mechanisms, each with different trade-offs between security, speed, and energy consumption.
| Mechanism | How It Works | Energy Use | Best For |
|---|---|---|---|
| Proof of Work (PoW) | Miners compete to solve a complex puzzle | Very high | Bitcoin — maximum security |
| Proof of Stake (PoS) | Validators stake crypto as collateral to validate | Very low | Ethereum — scalability + efficiency |
| Delegated PoS (DPoS) | Token holders vote for delegates to validate | Low | High-throughput public blockchains |
| Proof of Authority (PoA) | Approved validators verified by identity | Minimal | Private / enterprise blockchains |
| Proof of History (PoH) | Cryptographic timestamp as sequence proof | Very low | Solana — ultra-fast transaction speed |
Proof of Work — the original consensus mechanism
Proof of Work (PoW) is the consensus mechanism invented by Bitcoin. Miners compete to solve a computationally intensive puzzle — finding a number (the nonce) that, when combined with the block data and hashed, produces a result below a target value. The first miner to find this number wins the right to add the next block and receives the block reward. PoW is extremely secure — it requires enormous real-world energy expenditure to attack — but that energy consumption is also its primary criticism.
Proof of Stake — the efficient alternative
Proof of Stake (PoS) replaces energy-intensive computation with financial collateral. Validators lock up (stake) a quantity of cryptocurrency as collateral. The network randomly selects validators to propose new blocks, weighted by the size of their stake. If a validator acts dishonestly — for example, by trying to validate a fraudulent transaction — they lose their staked collateral (called ‘slashing’). Ethereum completed its transition from PoW to PoS in 2022, reducing its energy consumption by over 99.9%.
Proof of Work (PoW) uses computational competition — miners solve a mathematical puzzle, consuming large amounts of energy. The winner adds the next block. Proof of Stake (PoS) uses economic commitment — validators lock up cryptocurrency as collateral to earn the right to validate. PoS is far more energy-efficient (over 99% less energy than PoW) and is now used by Ethereum and most modern blockchain networks. Bitcoin continues to use Proof of Work.
4 Types of Blockchain Networks — and When to Use Each
Not all blockchains are the same. There are four main types of blockchain networks, each designed for different use cases and different levels of access and control.
| Type | Access | Who Controls It | Best Use Case | Examples |
|---|---|---|---|---|
| Public | Open to everyone | Decentralised — no one | Cryptocurrency, DeFi, NFTs | Bitcoin, Ethereum |
| Private | Invitation only | Single organisation | Internal enterprise data | Hyperledger Fabric |
| Consortium | Restricted | Group of organisations | Supply chain, banking | R3 Corda, Quorum |
| Hybrid | Mixed — some open, some private | Combination | Healthcare, government | Dragonchain |
Public blockchain — open, decentralised, permissionless
Public blockchains are open to anyone — anyone can read the ledger, submit transactions, and participate in the consensus process. They are fully decentralised, with no single point of control. Bitcoin and Ethereum are the most widely used public blockchains. Public blockchains maximise trust and transparency but sacrifice transaction speed and privacy.
Private blockchain — controlled, permissioned, enterprise-grade
Private blockchains restrict access to approved participants. A single organisation controls who can join, read data, and validate transactions. This makes them faster and more efficient than public blockchains — but at the cost of decentralisation. Private blockchains are used primarily for internal enterprise applications where the transparency of a public chain is not required but the immutability and auditability of blockchain are still valuable.
Consortium blockchain — shared governance between organisations
Consortium blockchains are governed by a group of organisations rather than a single entity. Access is restricted, but control is distributed among the consortium members. This model is widely used in industries where multiple competing organisations need to share a trusted record — banking consortiums, supply chain partnerships, and trade finance networks. R3 Corda and Quorum are prominent examples.
Hybrid blockchain — the flexible middle ground
Hybrid blockchains combine elements of public and private architectures — some data is public and accessible to anyone, while other data is restricted to authorised participants. This provides the flexibility to make certain records transparent (for public accountability) while keeping sensitive business data private. Hybrid blockchains are increasingly popular for government applications and healthcare.
What Are Smart Contracts and How Do They Work on Blockchain?
A smart contract is a self-executing programme stored on a blockchain that automatically enforces and executes the terms of an agreement when predefined conditions are met — with no intermediary required.
Think of a smart contract as a vending machine for agreements. You put in the correct input (the conditions are met), and the output (the agreed action) happens automatically, without anyone needing to intervene. The code is stored on the blockchain, making it transparent, tamper-proof, and automatically enforceable.
A simple example of how a smart contract works
Two parties agree: ‘If the shipment arrives at the warehouse by Friday and the sensor confirms the temperature stayed below 8°C throughout transit, payment is automatically released.’ This condition is coded into a smart contract on the blockchain. When the IoT sensor data is received and both conditions are confirmed, the payment is automatically transferred — instantly, without invoices, payment terms, or manual processing.
Why smart contracts matter for business in 2026
- They eliminate the need for intermediaries — lawyers, banks, escrow agents — reducing cost and delay.
- They execute automatically when conditions are met — no chasing for payment or manual contract enforcement.
- They are transparent and auditable — all parties can verify exactly what the contract does before agreeing to it.
- They are composable — smart contracts can call other smart contracts, enabling complex multi-step business logic to be automated.
Smart contracts are the foundation of decentralised applications (DApps). Our guide to what are decentralised applications (DApps) in blockchain explains how DApps use smart contracts to deliver financial services, gaming, identity management, and more — without a central controlling company.
Blockchain vs Traditional Database: Key Differences
One of the most common questions from business owners evaluating blockchain is: why not just use a traditional database? The answer depends entirely on your use case. Here is a side-by-side comparison to help you understand when blockchain genuinely adds value and when it does not.
| Feature | Traditional Database | Blockchain |
|---|---|---|
| Control | Centralised — one authority | Decentralised — distributed across nodes |
| Data modification | Admin can alter or delete records | Records are immutable — cannot be altered |
| Transparency | Private — limited visibility | Transparent — all participants can verify |
| Trust model | Trust the institution | Trust the code and mathematics |
| Single point of failure | Yes — if server fails, data is at risk | No — thousands of nodes hold identical copies |
| Transaction speed | Very fast (milliseconds) | Slower (seconds to minutes), improving with Layer-2 |
| Cost per transaction | Low at small scale | Varies — can be high on-chain, low via Layer-2 |
| Best for | Fast, private, controlled operations | Transparent, multi-party, trust-critical operations |
When to use blockchain vs a traditional database
- Use a traditional database when: you need maximum speed, you are the only party managing the data, and you do not need external parties to verify its accuracy.
- Use blockchain when: multiple independent parties need to share and trust the same data, no single party should have the power to alter it unilaterally, and you need an immutable audit trail.
Simple test: if you can answer ‘yes’ to these three questions, blockchain is worth evaluating.
(1) Do multiple parties need to read and write to the same dataset?
(2) Do those parties have limited trust in each other or in a central authority?
(3) Is an immutable, auditable record of all changes important?
If the answer to any of these is ‘no’, a well-designed traditional database may serve you better.
Real-World Blockchain Use Cases in 2026 — Across Every Industry
For most of its early history, blockchain was synonymous with cryptocurrency. In 2026, that is no longer true. Blockchain is the connective tissue of modern digital infrastructure — powering financial systems, supply chains, healthcare records, and digital identities across every major industry.
| Industry | Use Case | How Blockchain Helps | 2026 Status |
|---|---|---|---|
| Finance & Banking | Cross-border payments, DeFi, stablecoins | Eliminates intermediaries; settles in seconds not days | Live at scale — JPMorgan Kinexys, HSBC Orion |
| Supply Chain | Product tracking, authenticity verification | Creates tamper-proof provenance record from source to shelf | Widely deployed — Walmart, Maersk, IBM Food Trust |
| Healthcare | Patient records, drug traceability | Secures data access; tracks medications through supply chain | Growing — FDA pilot programmes active |
| Real Estate | Asset tokenization, property transfers | Fractionalized ownership; instant settlement; no paper trail | Accelerating — DTCC tokenization rollout H2 2026 |
| Government | Digital identity, voting, land registry | Immutable public records; fraud-resistant citizen data | Pilot deployments in 40+ countries |
| Education | Credential verification, certificates | Tamper-proof academic records; instant employer verification | Live — MIT, University of Melbourne using blockchain |
| AI + Blockchain | Verifiable AI decisions, agent transactions | Blockchain provides audit trail for autonomous AI actions | Emerging frontier — SingularityNET, Fetch.ai |
Finance and banking — the leading adopter
Financial services has been the fastest-adopting sector for enterprise blockchain. Cross-border payments that once took three to five days now settle in seconds on blockchain rails. JPMorgan’s Kinexys platform processes billions of dollars in daily transactions. HSBC Orion enables tokenised bond issuance. Stablecoins — cryptocurrencies pegged to fiat currencies — have become a critical infrastructure layer for global payments, accelerated by the US GENIUS Act passed in July 2025 that established a regulatory framework for their operation.
Real-world asset tokenization — the biggest trend of 2026
Asset tokenization — converting ownership rights in physical assets (real estate, bonds, commodities, art) into digital tokens on a blockchain — is one of the most significant developments in finance. The tokenised real-world asset market has reached $30 billion and is projected to exceed $50 billion in 2026. Major investment banks including BlackRock, Goldman Sachs, and Fidelity have all launched tokenised fund products. The benefits of blockchain for businesses in this space include 24/7 trading, fractional ownership, instant settlement, and dramatically reduced administrative overhead.
Supply chain — trust at every step
Supply chain management is one of blockchain’s most impactful real-world applications. Walmart uses blockchain to trace food products from farm to shelf in seconds rather than days. Maersk uses it for container shipping documentation. The result is faster recall responses, eliminated counterfeit goods, and end-to-end visibility that no centralised database could provide across a multi-party global supply chain. Our detailed guide to blockchain for supply chain management covers the mechanics and business case in depth.
AI and blockchain convergence — the frontier of 2026
Perhaps the most exciting development in 2026 is the convergence of artificial intelligence and blockchain. AI agents can now hold wallets, execute transactions, and interact with smart contracts — with blockchain providing a verifiable, tamper-proof audit trail for every autonomous AI decision. This addresses one of the biggest concerns about agentic AI systems: accountability. When an AI agent makes a decision or takes an action, blockchain records exactly what it did, when, and on what basis — providing the transparency that regulators and enterprises require for responsible AI deployment.
Related to read: The Security Risks of Blockchain Technology
How to Use Blockchain Technology for Your Business — Getting Started
If you are a business owner evaluating how to use blockchain technology, the starting point is not the technology — it is the problem you are trying to solve. Blockchain is a powerful tool, but it is not the right tool for every situation.
Step 1 — Identify your use case
Start with a specific, well-defined business problem. Are you trying to create a tamper-proof record that multiple parties can trust? Automate contract execution? Enable faster, cheaper cross-border payments? Verify the authenticity of products in your supply chain? The clearer your use case, the better your blockchain architecture decisions will be.
Step 2 — Choose the right type of blockchain
Based on your use case, select the appropriate blockchain type. If you need a public, transparent, censorship-resistant record — public blockchain. If you need a controlled, enterprise-grade shared ledger with known participants — private or consortium blockchain. If you need flexibility — hybrid. Most enterprise blockchain implementations in 2026 use private or consortium chains built on frameworks like Hyperledger Fabric or R3 Corda.
Step 3 — Evaluate build vs. integrate
You rarely need to build a blockchain from scratch. In most cases, you are building an application on top of an existing blockchain platform — Ethereum, Hyperledger Fabric, Polygon, Solana, or others. The engineering effort goes into designing your smart contracts, your data architecture, your integration with existing systems, and your governance framework — not into building a new consensus mechanism.
Step 4 — Engage a specialist implementation partner
Blockchain implementation requires expertise across cryptography, distributed systems, smart contract development, security, and regulatory compliance. Unless you have a dedicated blockchain team in-house, partnering with a specialist technology firm is the most reliable path to a production-grade implementation. GrapesTech Solutions provides end-to-end blockchain development and AI development services — from use case scoping and architecture design through to deployment and ongoing support.
GrapesTech tip: The most successful blockchain implementations in 2026 share a common characteristic — they solve a specific, well-defined problem for a clearly identified group of participants. The businesses that struggle are those that start with ‘we want to use blockchain’ rather than ‘we have this specific trust or transparency problem’. Start with the problem, not the technology.
Blockchain Technology Trends to Watch in 2026 and Beyond
Blockchain is evolving rapidly. Here are the key trends shaping the technology’s direction in 2026 — all based on current deployments, enterprise investment, and regulatory developments.
1. Real-world asset tokenization reaching critical mass
The tokenized RWA market has grown 4x in two years to reach $30 billion. The DTCC — the central clearing house for US securities markets — announced in December 2025 that it would offer asset tokenization services with rollout beginning in H2 2026. When the world’s largest securities clearing house embraces tokenization, the technology has definitively crossed from experimental to mainstream.
2. Layer-2 networks solving the scalability problem
Layer-2 networks — built on top of base layer blockchains like Ethereum — process transactions off the main chain and batch them for settlement, dramatically increasing throughput and reducing costs. Networks like Polygon, Arbitrum, and Optimism now handle millions of daily transactions at fractions of a cent each. This scalability breakthrough has removed one of the biggest barriers to enterprise blockchain adoption.
3. AI and blockchain convergence
As covered in Section 8, the integration of AI agents with blockchain infrastructure is one of the most transformative developments of 2026. AI agents that can hold wallets, execute transactions, and interact with smart contracts — with every action recorded immutably on-chain — represent a new paradigm for enterprise automation. This convergence is expected to accelerate significantly through 2027 and 2028.
4. Regulatory clarity driving institutional adoption
The US GENIUS Act (July 2025) established the first comprehensive regulatory framework for stablecoins. The EU’s MiCA regulation is now fully in effect. Japan, Singapore, the UAE, and the UK have all established clear blockchain and digital asset regulatory frameworks. This clarity is the single biggest driver of institutional adoption — it reduces legal and compliance risk, allowing large organisations to commit capital and resources to blockchain infrastructure with confidence.
5. Blockchain in education and digital identity
The global blockchain in education market is valued at $0.72 billion in 2026 and projected to grow to $13.52 billion by 2035. Universities including MIT and the University of Melbourne are already issuing blockchain-verified credentials. For digital identity — proving who you are online without sharing more data than necessary — blockchain-based decentralised identity systems are gaining traction as a privacy-preserving alternative to centralised identity providers.
Conclusion: Blockchain Technology in 2026 — From Theory to Infrastructure
Blockchain is no longer a speculative technology. In 2026, it is the operational infrastructure behind trillions of dollars in financial settlements, millions of supply chain records, and the emerging layer of trust for AI-powered autonomous systems.
Understanding how blockchain works — at the level of individual blocks, cryptographic hashes, consensus mechanisms, and smart contracts — gives you the foundation to evaluate it clearly for your own business context. The technology is not universally the right solution. But for use cases involving shared data, multiple independent parties, and the need for an immutable audit trail, it is increasingly difficult to find a better one.
Ready to explore how blockchain could help your business?
Book a free consultation with GrapesTech Solutions — we will assess your use case and give you an honest recommendation on whether blockchain is the right solution and what implementation would look like.
Related Reading from GrapesTech Solutions
- What is blockchain technology — beginner’s introduction — read the guide
- Top benefits of blockchain for businesses — read the guide
- Understanding blockchain for supply chain management — read the guide
- What are decentralised applications (DApps) in blockchain — read the guide
- What is agentic AI — the next generation of autonomous intelligence — read the guide
- Digital transformation strategies and challenges — read the guide
Frequently Asked Questions About How Blockchain Works
A blockchain is created by establishing a genesis block — the first block in the chain, which has no predecessor. The network’s rules (the protocol) are coded into the blockchain software, including how transactions are validated, how new blocks are added, and how consensus is reached. Nodes then download this software and connect to the network, collectively maintaining and extending the chain as new transactions occur.
You access a public blockchain through a wallet application — software that manages your cryptographic keys and allows you to send, receive, and view transactions. For Ethereum and EVM-compatible chains, MetaMask is the most widely used browser-based wallet. For Bitcoin, options include Coinbase Wallet, Electrum, and hardware wallets like Ledger. Enterprise blockchain networks typically use custom interfaces built on top of the blockchain infrastructure.
Implementing blockchain for a business involves: (1) defining a specific use case where trust, transparency, or immutability adds clear value; (2) choosing the appropriate blockchain type (public, private, consortium, or hybrid); (3) selecting a blockchain platform (Hyperledger Fabric, Ethereum, Polygon, R3 Corda etc.); (4) designing and auditing smart contracts; (5) integrating with existing business systems; and (6) establishing governance rules for the network. Most businesses engage a specialist blockchain development partner for implementation.
A block is ‘locked’ (sealed) by computing its cryptographic hash — a unique mathematical fingerprint of all the data it contains, including the previous block’s hash. This hash is generated using a one-way mathematical function (such as SHA-256) that is easy to compute but practically impossible to reverse. The block is then broadcast to the network, verified by nodes, and added to the chain. From that point, altering the block would change its hash, breaking its link to the next block — making tampering immediately detectable.
Blockchain processing refers to the time it takes from when a transaction is submitted to when it is confirmed on the chain. This varies significantly by network: Bitcoin processes transactions every 10 minutes (with full confirmation taking about 60 minutes). Ethereum processes a block every 12 seconds. Solana can process up to 65,000 transactions per second. Layer-2 networks built on Ethereum (Polygon, Arbitrum) offer near-instant finality at very low cost. For enterprise private blockchains, transaction throughput and speed can be configured to match business requirements.
