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 0x317b59c6be4dbbdcd095bf3cbbe43d2f06f8ae402c80d83ddb777b97b801480a. 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/94f4c6be-3942-4ca8-88c7-5cf40107d5ce.json and https://artists.proofprofile.net/proofs/artist/94f4c6be-3942-4ca8-88c7-5cf40107d5ce.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Herr, nun lässest du deinen Diener, Op. 69, n°1
Denn Er has seinen Engeln befohlen (Double chœur extrait d'Elias)
Le jour m'étonne et la nuit me fait peur (Extrait de Figure Humaine)
Le Chœur Voyageur 2018 (with Alexis Duffaure)