Super Smart Bitcoin
Expansion guide

How a Bitcoin Transaction Reaches the Blockchain

New editorial page: this guide reorganizes the site’s own mining explanation into a practical sequence.

Broadcast and waiting

A transaction is broadcast to the network and waits with other unconfirmed transactions in the mempool.

Selection and proof of work

Miners select transactions for a candidate block and repeatedly calculate hashes in search of a value that meets the network difficulty target.

Validation and addition

When a miner broadcasts a valid block, other participants verify its transactions and proof of work. A block that satisfies the consensus rules can be added to the blockchain.

Why the process changes over time

The network adjusts mining difficulty as computational power changes. The site’s full explainer also covers rewards, fees and the longest-chain rule.

Read the source article or continue with the risk-claims guide.