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 0x3e83d3d0ce38dbf58bacba2306ad1dd02935d07b3a23132ca29b1cede0ee8004. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc34d67e-d2fc-4d90-b43f-035aaa48b93f.json and https://artists.proofprofile.net/proofs/artist/bc34d67e-d2fc-4d90-b43f-035aaa48b93f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).