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 0x38ef856c57df8e5e57c6491f57a36b59d282d731d2e9be9de8b67f764e1d7c24. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4e4fc1d-b9b9-4bbc-80a4-e89b019707f6.json and https://artists.proofprofile.net/proofs/artist/e4e4fc1d-b9b9-4bbc-80a4-e89b019707f6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).