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 0x2296735a6e0724601ae708da6285918d4e9fa3d96b8bb30a69618aa50a69de79. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/929cd75d-eee6-4b70-b7f1-dfd353362541.json and https://artists.proofprofile.net/proofs/artist/929cd75d-eee6-4b70-b7f1-dfd353362541.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sa Majesté l'orgue de cinéma (Collection "Le grand éventail instrumental", Vol. 2)