What Does "Immutable Record" Mean?


Jake Morr


August 25, 2023

An immutable record ensures data cannot be changed once recorded. In Bitcoin's context, its blockchain serves as an immutable ledger, meaning once a transaction is added, it cannot be altered without altering every subsequent block, which is practically infeasible. The cryptographic SHA-256 hash function primarily enforces this quality. Each block's hash includes the previous block's hash; thus, any change to a block invalidates all following blocks. Bitcoin's immutability is vital for its trustworthiness, ensuring transparency and data integrity in financial transactions.


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