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 0x235c9c6b1756e83949fb1863198a3b542705593f9c7ad89745fe3d4705281edd. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9b0d7b8-13bc-4c1c-8bba-e7a9ad61f37b.json and https://artists.proofprofile.net/proofs/artist/f9b0d7b8-13bc-4c1c-8bba-e7a9ad61f37b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Otis Williams & The Charms: The 1953-1962 King/Deluxe Recordings
Love Love Stick Stov / Love's Our Inspiration (Digital 45)
Heart of a Rose / I Offer You (Digital 45)
Boom Diddy Boom Boom / I'll Be True (Digital 45)
Love Love Stick Stov (Alternate Take) / Love's Our Inspiration [Alternate Take] [Digital 45]
Boom Diddy Boom Boom! Ohio Doo Wop from Otis Williams & The Charms