Block Confirmation Definition - Glossary

Block Confirmation is the process of verifying and adding a transaction to the blockchain through multiple network validations.

Block Confirmation is the process where a blockchain transaction is verified and added to a block. Each confirmation represents a successful verification by the network. When a transaction is included in a block, it receives its first confirmation. As subsequent blocks are added to the chain, the transaction receives additional confirmations, increasing its security and reducing the risk of reversal. The number of required confirmations varies by cryptocurrency and is determined by the network's protocol. More confirmations mean higher transaction security, as reversing it would require altering multiple blocks, which is computationally impractical and highly unlikely.