A blockchain is an alternative to a private database. Public blockchains provide a distributed ledger that all can see. Each block contains data such as an account balance or a transaction, which then is verified and broadcast publicly. The Blockchain is a database that has a specific way of storing and managing information. A blockchain is a continuously growing list of records, called blocks, which are linked and secured using cryptography. Bitcoin and other cryptocurrencies use blockchain technology but the blockchain can be used for any type of database. Blockchain is not the same as bitcoin.