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 0xd56bd743b3ca9e4a0537c0f5b91affa4cbff5c68a5cebfcf8814c727dd7c0d74. 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/df33ee53-2f33-4703-96ce-5fd8cdcc84e9.json and https://artists.proofprofile.net/proofs/artist/df33ee53-2f33-4703-96ce-5fd8cdcc84e9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).