1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce92d621913957682a428268db760d6e3dbed7bc69aa83a2cf142118a3fe8216. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81dada09-b1b6-4a52-ad79-6b6634497ae2.json and https://artists.proofprofile.net/proofs/artist/81dada09-b1b6-4a52-ad79-6b6634497ae2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
You Keep Me Hanging On (X Factor Recording)
You Keep Me Hanging On - X Factor Recording
Lady Marmalade / Bang Bang (X Factor Recording)
Lady Marmalade / Bang Bang - X Factor Recording