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 0xe61319166d57bb5fe0b37c32d0923cc175c5aeb9df54e0470521c85963861ef3. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7c2758d-7f3a-45a9-b2aa-5b2ac5a8d2d2.json and https://artists.proofprofile.net/proofs/artist/a7c2758d-7f3a-45a9-b2aa-5b2ac5a8d2d2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).