Final Exit: The Practicalities of Self-Deliverance and Assisted Suicide for the Dying, often shortened to just Final Exit, is a 1991 book written by Derek Humphry, a British-born American journalist,
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cd9f0f674892c12df7cfafe8b5b0b2e6c0d434589b6c1676b9d61c8e20c0e2. Chain 2 (Bitcoin): anchored in block 953954 (2026-06-16T14:18:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/265de55e-99d8-48d6-b6f8-320110e5bc8f.json and https://artists.proofprofile.net/proofs/artist/265de55e-99d8-48d6-b6f8-320110e5bc8f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).