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 0x5c61bba93cf7bc4357542be15496a49d18ebc39ffddc601dbd6cbdc985ec593b. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/945fb986-12b1-49ff-80a7-4ae828fbcf6c.json and https://artists.proofprofile.net/proofs/artist/945fb986-12b1-49ff-80a7-4ae828fbcf6c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Muz se zeleznou maskou (Original Prague Cast Recording)
Original Prague Cast of Muz se zeleznou maskou
Casanova (Original 2013 Czech Cast Recording)