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 0xac3b89d4ba07f9d38ecd535b62c6a516ac1e5e91582cfec9b41c5fe006e99358. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/487fb806-6a7a-438f-9e43-0a9e8df30fef.json and https://artists.proofprofile.net/proofs/artist/487fb806-6a7a-438f-9e43-0a9e8df30fef.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).