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 0xe5b39b80c5432d3e0c7fb188535c27261f1190a199c3a7ad96f788fc14bc78b5. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91bbcd49-f8c1-46ea-9f7f-3f07566d0c02.json and https://artists.proofprofile.net/proofs/artist/91bbcd49-f8c1-46ea-9f7f-3f07566d0c02.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).