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 0x7a623e6ee89d651e0bb1aec83f9c6cf1c3956c35f1525ea55d79b62367f0d54b. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db4b238f-bbfb-4a10-be6f-ec3d6f53a8c4.json and https://artists.proofprofile.net/proofs/artist/db4b238f-bbfb-4a10-be6f-ec3d6f53a8c4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).