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 0xdf61ad00286cedd10a24bd79e4096b5e2ed7aa3a5ee0a3045c5e016f6318970f. Chain 2 (Bitcoin): anchored in block 953662 (2026-06-14T17:28:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/554c6486-a030-43d3-b5d8-fe55f1ab7dfa.json and https://artists.proofprofile.net/proofs/artist/554c6486-a030-43d3-b5d8-fe55f1ab7dfa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).