What Is A Block Header?
A block header is a component of the blockchain that contains information about each individual block. It includes data such as the timestamp, hash of the previous block, and other important details related to the transaction. The purpose of this data is to ensure that all blocks are valid and secure within the network. This helps prevent double spending or any malicious activity from occurring on the blockchain.
The block header also serves as an identifier for each particular block in order to differentiate it from others on the chain. Each time a new transaction occurs, its associated data will be added into a new block which then gets linked with its predecessor through cryptographic hashes stored in both headers. By doing so, miners can easily verify if transactions have been tampered with by comparing their respective hashes against one another before adding them onto the ledger.