Definition ∞ An immutable record is a data entry or transaction that, once recorded, cannot be changed, deleted, or altered. In blockchain technology, this refers to data entries permanently stored on a distributed ledger, secured by cryptographic hashing and consensus mechanisms. Each new block cryptographically references the previous one, rendering retrospective alterations computationally infeasible. This property ensures data integrity and provides an unchangeable history of all operations.
Context ∞ The immutable record is a core feature of blockchain technology, providing a high degree of trust and transparency for transactions and data storage. Its implications are significant for supply chain management, legal documentation, and digital identity systems requiring verifiable histories. Discussions often focus on the challenges of correcting erroneous data entries on an immutable ledger and the legal ramifications of such permanence.
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