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 0x5397f87b29a8dffa83b77ce6827274b89c8226e335a3fab9b6aad4aa3d0e854a. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2df829d-935f-4c1a-ae6f-61d0ed86b65b.json and https://artists.proofprofile.net/proofs/artist/d2df829d-935f-4c1a-ae6f-61d0ed86b65b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).