Auguste-Joseph Franchomme (10 April 180821 January 1884) was a French cellist and composer. In addition to his work in Paris, he collaborated with Spanish cellist Víctor Mirecki Larramat and Belgian c
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 0x01b35d1acea41ed534a147c79af2d5f117d7bbb76fe0c32bfd138ce17ac2b945. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3d8d962-43f8-4177-a3f1-085c56290b67.json and https://artists.proofprofile.net/proofs/artist/b3d8d962-43f8-4177-a3f1-085c56290b67.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Franchomme: 3 Nocturnes, Op. 14: No. 1, Andante
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 0xfdcc8cb73df1bcea81b8fd46ad4acff0a77add25b8118caa2a3d5bea0fd28402. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRUM72300314 — a six-check JSON result.
12 Etudes for Violoncello, Op. 35: No. 9, Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0af6e81611c8510f7b3beb8629de940432abe04a2d081ef3ef0a6fe1eccf23b. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRUM72300332 — a six-check JSON result.
12 Etudes for Violoncello, Op. 35: No. 12, Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162ae80dd20b07ce209bc868f4596c1e55403ad7cc16b1404e3ee3d2526e39af. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRUM72300331 — a six-check JSON result.
Grand Duo concertant sur des thèmes de 'Robert le Diable' de Meyerbeer, B. 70: I. Introduction. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6ead1d53ea256548d64a59ab4cf8678008a476e5a8257970eb41aaac2c5afc. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRUM72300642 — a six-check JSON result.
Grand Duo concertant sur des thèmes de 'Robert le Diable' de Meyerbeer, B. 70: II. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd277342302422c3d256198ba6e07f57eddb53f1e2b21f3e0ced4f1ef74ba99f7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRUM72300643 — a six-check JSON result.
Grand Duo concertant sur des thèmes de 'Robert le Diable' de Meyerbeer, B. 70: III. Andate cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fc9324c5249d2fef71fa10596ae69b47e8bcd08ee6c25fd77b942618bdbf09. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRUM72300644 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcc8cb73df1bcea81b8fd46ad4acff0a77add25b8118caa2a3d5bea0fd28402. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRUM72300314 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89486a9f13b6063013b2e303bdd4da11609620b9004a2a7e7c677297f189ea08. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRUM72300319 — a six-check JSON result.
12 Etudes for Cello, Op. 35: No. 11, Adagio espressivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9a23be051183dad6561b7a14fd925583e471c5c8c919fbc65698c5716b19aa. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRUM72300336 — a six-check JSON result.
12 Etudes for Cello, Op. 35: No. 7, Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d86fcc890f10f4d4502aa6624c96709dac445a1ec35d3fbc0f535326423556. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRUM72300321 — a six-check JSON result.
Air russe varié for Violoncello and String Quartet, Op. 32: I. Poco lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83aa502a8fe5b2e97aa33b5810060c627926a4194b8dd19424d97f86e630e808. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRUM72300322 — a six-check JSON result.
Air russe varié for Violoncello and String Quartet, Op. 32: II. Andante sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b37bf77a2df00e7f68304093641590c0a7724c07c6b09621e5d849f6b4e8c7. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRUM72300323 — a six-check JSON result.
Air russe varié for Violoncello and String Quartet, Op. 32: III. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51e112b594eb217bfade78ab3016275536b0cda4b6a046617271420d0e9c08c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRUM72300324 — a six-check JSON result.
Air russe varié for Violoncello and String Quartet, Op. 32: IV. Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabdca8c5707a87b7006d36f4a47a49f90e7f6ae6ecbab424bc04fba614f45aa. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRUM72300325 — a six-check JSON result.
Air russe varié for Violoncello and String Quartet, Op. 32: V. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff18cac21f52c505bd63010c9a5be7dfe7857fe360027399289483da8acd54a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRUM72300326 — a six-check JSON result.
The Chopin Project : Complete Chamber Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6ead1d53ea256548d64a59ab4cf8678008a476e5a8257970eb41aaac2c5afc. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRUM72300642 — a six-check JSON result.
The Chopin Project : The Franchomme Legacy