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 0x5d5148dfb5aaeeace55db4b88e78e9acfa4ad8a3949fa1e41178ce4249d30603. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a54d8f54-10aa-4d97-a449-49ba98fba9e0.json and https://artists.proofprofile.net/proofs/artist/a54d8f54-10aa-4d97-a449-49ba98fba9e0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).