Audit log.

also: audit logs · audit trail · audit trails · audit logging

An immutable, chronological record of who did what to which resource, when and from where, kept for security and compliance.

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Actor, action, resource, timestamp, source: every entry answers who / what / which / when / where.
Unlike application logs (for debugging), audit logs are evidence: complete and tamper-evident.
Append-only and immutable; integrity proven with hash chains.
Retention is set by regulation, often years.

also: audit logs · audit trail · audit trails · audit logging

An immutable, chronological record of who did what to which resource, when and from where, kept for security and compliance.

Actor, action, resource, timestamp, source: every entry answers who / what / which / when / where.
Unlike application logs (for debugging), audit logs are evidence: complete and tamper-evident.
Append-only and immutable; integrity proven with hash chains.
Retention is set by regulation, often years.