Audit trail
Who launched what, against which targets, under which authorisation, with which safety profile, and what resulted. Every record is hashed together with the one before it, so rewriting history means rewriting everything after it.
Verify the chain
Recompute every hash for today and report the first break. This is what an assessor asks for when they want the audit trail demonstrated rather than asserted — and you can run it in front of them.