Nicolas Chalvin (born 1969) is a French contemporary conductor and oboist. Career After studying music at the Conservatoire national supérieur de musique et de danse de Lyon, he was successively ob
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 0xe8364f1a725795e0bbddf55617e50a781c847b80041adaaef95e512042dfda73. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2d39395-19a0-4c2b-98de-8bb4520c8ded.json and https://artists.proofprofile.net/proofs/artist/a2d39395-19a0-4c2b-98de-8bb4520c8ded.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Musique pour faire plaisir: I. Petite valse-Introduction - After Francis Poulenc
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 0x3ea810519eb42d45fe2672ea5c5eb6698d0d188b02da52fdee1d1b73512b137c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CH1262103201.
Musique pour faire plaisir: II. Élégie - After Francis Poulenc
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259f70fafd0796be37119fb8f437bcad22c16759e1b6d8763c5e75a80bd8e181. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1262103202.
Sept danses (d'après le ballet sur "Les Malheurs de Sophie"): I. Le jeu de la poupée
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa610e09a5085a78e89cd4e42f4737270a63970c2e346b75d6707b50dcc635d21. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1262103213.
Martin & Jolivet: Works for flute & orchestra
Orchestre des Pays de Savoie: Concert Live
Jean-Baptiste Robin: Time Circles, Orchestral & Chamber Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd457b088c8eba5f3941e44b1daf0f6c6132accb52dd05b15697ee5d1333b45b9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1201023.
Concerto for Trumpet in C Minor, Op. 42: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734777e49fad84cf1cb10ff03bb6d46547e4365094ec7262b1be0eb42bcef4d2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1507173.
Trumpet and Orchestra Concerto in A-Flat Major: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f139635ac34df403531ee55f1c3382225ca4f2e950741bb9ebc38d1cefdc38. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1507179.
Trumpet and Orchestra Concerto in A-Flat Major: II. Allegro energico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefef110691bf199de02a7141408cdd26397eb101189212ce0d15e0fa8713f92. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR3KD1507180.
Trumpet and Orchestra Concerto in A-Flat Major: III. Meno mosso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdde41196393c6eaa974be882cd66e06123c033a200c56b732c9eee890d4428. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FR3KD1507181.
Trumpet and Orchestra Concerto in A-Flat Major: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ad384b12762cec78df4d481dde0b7846106aaa625d39ed47323fe63c8e411d. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FR3KD1507182.
Concerto for Trumpet and Symphonic Orchestra: I. Andante - Allegro - Piu Mosso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64d14293fa0d5a80ca254ab64920ba681949790a3306cff3781c7d7383ebccd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR3KD1507183.
Concerto for Trumpet and Symphonic Orchestra: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6537d845e883c8703e6fd3be85079055d1ff0c95bbedde7ede2a2472796c645. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1507184.
Concerto for Trumpet and Symphonic Orchestra: III. Più Mosso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3c8fcf74b445ebaa7a5415c0e7a062f568b434b77eb54dc1f04f146ae904ca. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR3KD1507185.
Hahn: Divertissement pour une fête de nuit, Le bal de Béatrice d’Este, Sérénade & Concerto provençal
La vie en rose - Orchestral Version. Arr. By Edouard Delale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e9a3f4f5753ee7709ac313b3d95070a1de652af07ba86a0afe0f7d0cb15d70. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1402812.
Pierne, G.: Sophie Arnould / Ballet De Cour
Saint-Saens, C.: Symphony No. 2 / Cello Concerto No. 2 / Suite, Op. 49
Honegger, A.: Dit Des Jeux Du Monde (Le) / Concerto Da Camera
Eric Aubier Plays Ivan Jevtic and Dmitri Shostakovich: Trumpet Concertos