thumb|Brosse by Claude Truong-Ngoc (1981) Jean-Patrice Bernard Simon Brosse (23 June 1950 – 18 September 2021) was a French harpsichordist and organist. Biography Born in Le Mans on 23 June 1950, B
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 0xc2c7a5ee04806944e359f7b5ddce1697b9807d49323239938a8f0092d0721182. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4ab07d0-e1f8-4623-a2b5-fa25a7160789.json and https://artists.proofprofile.net/proofs/artist/b4ab07d0-e1f8-4623-a2b5-fa25a7160789.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Corelli: Concerto Grosso En Sol Mineur, G Minor Op.6 N°8 "Pour La Nuit De Noël" VI. Pastorale: Largo - Remasterisé En 1996
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf860fe230c2cc3aa583c135fbfbe51c865bebb6369a121b4a4c47ba64b4782c7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ110900587.