Overview

The point of this lesson is not to turn you into an engineer. It’s to give you a clean, correct mental model so the rest of Bitcoin makes sense: what gets recorded, who enforces the rules, and why the system can’t be “changed by vote.”

This page is a placeholder while we build the full lesson. For now, use it as a map of what will live here.

The Core Components

Transactions
Signed messages that move bitcoin under clear rules—no accounts, just ownership proofs.
Blocks
Batches of transactions, ordered in time, anchored to prior history.
Mining
Competition to add the next block, making history expensive to rewrite.
Nodes
The rule enforcers: independent software that verifies every block and every transaction.

Why the Rules Hold

Bitcoin works because verification is cheap and cheating is obvious. Anyone can run software that checks the rules, and invalid blocks are rejected. Mining adds cost to rewriting history, but nodes decide what counts as valid in the first place.

The full version of this lesson will include simple diagrams and a glossary, but the core idea is straightforward: miners propose; nodes verify.

Where to Go Next

After you understand the mechanics, the next step is learning how to hold bitcoin safely—custody, wallets, and basic security.

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Educational content only. Not financial advice.