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 0x50553e7b0f466d0c397f272f1f4d6589da8c7edb40bbb4b17c8a11102577f6cb. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef55a9b4-e47a-4347-b7f6-a323d3188ca6.json and https://artists.proofprofile.net/proofs/artist/ef55a9b4-e47a-4347-b7f6-a323d3188ca6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).