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Topic 02

How the Bitcoin network works

Blocks, nodes, consensus and the engineering that lets strangers agree without a central operator.

What you will learn

This path follows a transaction from a wallet into the peer-to-peer network, through node validation, a miner's candidate block, and growing confirmations. It also explains UTXOs, supply, and the halving so the moving parts form one system instead of a list of vocabulary words.

By the end, you can

  • Describe the separate jobs of wallets, nodes, and miners
  • Read a basic transaction and confirmation history
  • Explain how issuance rules are independently checked

How to use this learning path

Use the same three checks as you move through the guides. They turn a topic list into a repeatable research process.

Check the evidence

Check network claims against consensus documentation and observable node behavior. A block explorer can show a transaction or block, but it does not define validity. Independent nodes running compatible rules decide what they accept, and implementations should be distinguished from the protocol rules they enforce.

Name the risk

Technical explanations often collapse mining, validation, and wallet behavior into one vague process. That makes it easy to overstate what hashrate can control or to mistake an unconfirmed broadcast for settled value. Keep the actor, rule, and time horizon visible.

Guides in this topic

Follow the lessons in order, or open the question you need now.

01
Intermediate · 12 min

How Bitcoin Works

Follow one transaction from a wallet to the mempool, a mined block and final verification.

  • Wallets sign; nodes verify; miners order transactions.
  • Broadcast is not the same as confirmation.
Read guide →
02
Intermediate · 12 min

The Bitcoin Blockchain

What the blockchain stores, why it is intentionally limited and how nodes agree on its history.

  • Hashes make historical tampering evident.
  • Nodes verify miners, not the other way around.
Read guide →
04
Intermediate · 12 min

Bitcoin Transactions, Inputs and Outputs

Understand UTXOs, change, signatures, fees and confirmations without reading source code.

  • Bitcoin tracks UTXOs, not mutable account balances.
  • Wallet-generated change is a normal transaction output.
Read guide →
05
Intermediate · 12 min

Bitcoin Supply and the Halving

How issuance approaches 21 million and what the four-year subsidy schedule does - and does not - guarantee.

  • The halving changes new issuance, not existing coins.
  • A known schedule does not dictate a market price.
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