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 0xcabc9f1a1bdde7ac29e86d5af8353d6fb72365fd88077ac32e9a7d977fc4fe94. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50f9fd7f-c0c1-4f33-a7b8-8e5b751a1b2c.json and https://artists.proofprofile.net/proofs/artist/50f9fd7f-c0c1-4f33-a7b8-8e5b751a1b2c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).