One-sentence answer
Many independent nodes keep and verify their own ledger copies; miners propose blocks, but nodes decide whether those blocks follow the rules.The bank is not replaced by one company
Traditional systems often have one institution maintain an authoritative database. Bitcoin lets anyone run a node, receive blocks and transactions from peers, and verify them locally.
Each full node has its own view of the ledger. There is no master database everyone must trust.
Miners propose; nodes check
Miners assemble pending transactions and compete through proof of work. When a new block is broadcast, nodes check its structure, transactions, reward, and proof of work.
Hash power cannot force nodes to accept a block that violates the rules, and nodes do not skip verification because a famous miner produced it.
A wallet is not the whole network
A typical wallet generates addresses, manages keys, and constructs transactions. It may connect to your own node or query a third-party service, trading convenience against independent verification.
Three things to remember
- ✓Nodes independently verify and store the ledger.
- ✓Miners propose blocks; they are not the final judges of the rules.
- ✓A wallet manages authorization, not the entire Bitcoin network.
A common follow-up
Does running a node earn bitcoin?
A normal validating node does not automatically receive block rewards. Its direct benefit is independent verification without fully trusting a third party.
Primary sources
Primary sources
These links lead to protocol material, developer documentation, or open-source code—not trading services.