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 0x56cf05b1289c65161be9fd9392f9504ae9a77bd2b61fd1e6c1775ddb50dd73b9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1b89dbf-d40c-4e9c-88ea-9b2e01bbe3b0.json and https://artists.proofprofile.net/proofs/artist/c1b89dbf-d40c-4e9c-88ea-9b2e01bbe3b0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).