A block on a blockchain is the data record of all transactions made on the blockchain network during a specific time period. Blocks are sequentially added to a network’s data chain, which forms the public ledger known as a blockchain. A Bitcoin block, for example, contains information about the date, time, and number of transactions, as well as signature information about the transfer’s origin and destination. Before a chain can continue transacting and creating new blocks, blocks must be confirmed by the network through a consensus process.