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 0xeca8023f9600a8cf2369a15e15e8550855b88a206fe93d4003ac76a3a7c3ad56. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30e024c1-0928-4369-a17f-3e57ebe27344.json and https://artists.proofprofile.net/proofs/artist/30e024c1-0928-4369-a17f-3e57ebe27344.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Festival international Nuits d'Afrique 33ème édition - Compilation 2019