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 0xc9449597f9f7a6195024f9daaef571c155e06d87f8bbeb2f8bd6e2742ff418f5. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31b2904e-b5fe-482f-9d6d-b4f5731c5704.json and https://artists.proofprofile.net/proofs/artist/31b2904e-b5fe-482f-9d6d-b4f5731c5704.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).