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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d82250bc052d6c8b20880a6b3724f40c5b16d6dc3102a5a1e4a81b324b25ea0. Chain 2 (Bitcoin): anchored in block 953864 (2026-06-16T00:30:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03cc95d8-cfd4-47b1-bb52-a2df120572ee.json and https://artists.proofprofile.net/proofs/artist/03cc95d8-cfd4-47b1-bb52-a2df120572ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).