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 0x6108dfc5bc365e97e0ef3c0f9c5641eb0c90d9664cf9afa194f791c83bd9f3f8. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3dd6e0f-8a71-4dbe-8436-da95ce15680a.json and https://artists.proofprofile.net/proofs/artist/a3dd6e0f-8a71-4dbe-8436-da95ce15680a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).