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 0x378e5ceec39db97477b6ff743b3b030120cf42e18f3a74f4299721d069f0332c. 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/931b2bc3-d754-4862-923a-7923a06f0abf.json and https://artists.proofprofile.net/proofs/artist/931b2bc3-d754-4862-923a-7923a06f0abf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pop'n'jazz (feat. Morten Lund & Peter Vuust)