How the network works
Crypto Dispensers | Bitcoin learning path
AI-generated narration. Original diagrams; fictional examples.
Reviewed October 22, 2026.

A transfer needs a shared record
Imagine Maya later sends some Bitcoin. A transaction means a record of a Bitcoin transfer. Her wallet prepares the details, including the amount and where it should go. Computers need a way to check that spending is allowed and keep a shared history. Otherwise someone could try to spend the same Bitcoin twice.

A secret key gives spending permission
A private key is secret computer information that can authorize spending. The wallet uses it to create a digital signature, a mathematical proof of permission. Other computers can check that proof without learning the secret key. The signature doesn't prove the person requesting payment is honest. Maya still has to check the recipient.

Nodes check, miners propose
A node is a computer running Bitcoin software. A fully checking node, also called a full node, checks transactions and proposed blocks against the rules. A block groups transactions together. Miners use computing work to compete to propose the next block. Nodes reject a block that breaks the rules, even if the miner did the work.

The blockchain is the linked history
The blockchain is the history of accepted blocks. Each block refers to an earlier block using a hash, a calculated fingerprint of information. Those links help reveal changes. Bitcoin also requires valid transactions and proof of work, the miner's computing evidence. Recalculating a fingerprint alone cannot make a false payment history acceptable.

What this means for Maya
Maya doesn't have to run a node or mining equipment to buy or use Bitcoin. Her wallet and chosen service handle parts of the process. She still needs to understand their different jobs. A wallet prepares spending permission, nodes check the rules, and miners propose blocks. None of those jobs guarantees an investment return.

Can a miner ignore the rules?
Suppose a miner proposes a block creating more new Bitcoin than the rules allow. Must a full node accept it because the miner worked hard? No. It rejects the invalid block. Return to stage two to follow the diagram and try its check. The optional linked-record demonstration lets you explore fingerprints.

Continue: https://www.cryptodispensers.com/learn#lp-network