thumb|Cain slaying Abel, by Peter Paul Rubens, Murder is the unlawful killing of another human without justification or valid excuse and committed with the necessary intent as defined by the law in
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3987de40f77b02fbee1a22d330cb13efbe937dabb2fd50a7138fcaa62eef21fc. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9485654b-2fd2-4f83-af8b-d4a06ad98992.json and https://artists.proofprofile.net/proofs/artist/9485654b-2fd2-4f83-af8b-d4a06ad98992.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).