thumb|Meyer with Les Six - Group portrait by Jacques-Emile Blanche Marcelle Meyer (; 22 May 189717 November 1958) was a French pianist. She worked with a group of composers known as Les Six, of whom
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38093895d3f636d2cc03d8957e1257eafa4a34bd718d2243dcc0cff9ceada9c. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/71c372d7-d5e9-4b81-bacc-22c122939e6e.json and https://artists.proofprofile.net/proofs/artist/71c372d7-d5e9-4b81-bacc-22c122939e6e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d653035913af58556efe94e4c4cacae28fa7dc2ff1402226ff3844c435f36e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USA561051966.
J.S.Bach Three-Part Inventions (Sinfonias)
J.S.Bach - Partita No.6 in E Minor, BWV 830
J.S.Bach - Partita No.1 in B flat Major, BWV 825
J.S.Bach - Partita No. 2 in C Minor, BWV 826
J.S.Bach - Partita No.3 in A Minor, BWV 827
Rameau: Recueil, Nouvelles suites & Dauphine and Chabrier
Chabrier, Stravinsky, Milhaud & De Falla: Piano Works
Couperin: Pièces pour clavier - Ravel: Le tombeau de Couperin