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 0x7ad8a19f6bf9e98b6679902beae30c36ea4b9d843a99baa0c7f98a4e56087f50. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/acb1f55f-0c60-49d2-81bc-f8481afce4b8.json and https://artists.proofprofile.net/proofs/artist/acb1f55f-0c60-49d2-81bc-f8481afce4b8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).