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 0x2e1d928844513b2873c431efebcf3f7da9dc603c1ec7a4b7a8915742c51cf778. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5cb96578-36e6-42b5-b3ac-da4e0154b569.json and https://artists.proofprofile.net/proofs/artist/5cb96578-36e6-42b5-b3ac-da4e0154b569.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Finalement (Special studio version for cello)
Finalement - Special studio version for cello
Nuit (Nuit Special Version Studio for cello)
Nuit - Nuit Special Version Studio for cello