Block verification is the process where nodes in a network check and validate new blocks of transactions before they are added to the blockchain. Each block contains a list of transactions, a timestamp, and a reference to the previous block, ensuring data integrity. During verification, nodes ensure that all transactions in the block are legitimate.

This includes checking that the sender has enough funds and that the transaction follows the protocol’s rules. Miners, who compete to add new blocks, also solve complex mathematical problems that help secure the network. Once a block is verified, it’s added to the blockchain, making it part of the permanent record.

This process helps maintain trust in the system, as all users can verify the legitimacy of transactions. Additionally, it prevents double-spending and ensures that the integrity of the entire blockchain is upheld. Overall, block verification is crucial for maintaining a secure and functional system, enabling users to rely on accurate and transparent transaction records.