A practical guide to AI ethics and responsibility, built from a real-world incident — and from the body of work that came after.

Tamper-evident, time-stamped daily Merkle anchor log for the CausalLayer AI-liability engine. Each commit is a third-party-verifiable cryptographic witness of the engine accuracy ledger — auditable by adversaries, regulators, and skeptics without any vendor cooperation. Ed25519 + OpenTimestamps + Bitcoin.