thumb Alain Lefèvre, (; born July 23, 1962) is a French Canadian pianist and composer. He has performed at venues such as Carnegie Hall, Kennedy Center, Royal Albert Hall, Royal Festival Hall, Théatr
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 0xe2467f8e6754e53b3d506eba4c193bf104e7d6eb62db9af11627cf512e8244f3. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a6b7718-804a-4963-8903-8ded9c3e3219.json and https://artists.proofprofile.net/proofs/artist/5a6b7718-804a-4963-8903-8ded9c3e3219.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Debussy: Clair de lune and Other Masterpieces
Debussy: 2 Arabesques, CD 74, L. 66: No. 1, Andantino con moto
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 0x7b2189856a343696f261f20cc2bf5026d64e91286df938ead148c77aaaee4d11. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:23:49Z), 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/GBAYC0704090.
Debussy: String Quartet in G Minor, Op. 10, CD 91, L. 85: II. Assez vif et bien rythmé
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64344f3eade43fb89f86899f385699b156c01a19f0138492429e2e54a08709ce. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBAYC0002568.
Debussy: Cello Sonata in D Minor, CD 144, L. 135: III. Final. Animé, léger et nerveux
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd70d8c0d7e63ac50e5e0ed787dcffc1b5e9ad2df769d3d3d148cfafa2a4ef5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ208310003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba814f223f28d45f98159cc73d6f76ceb543b71359f7b85af1a0b8c325d9a9f0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBAYC9902546.
Debussy: Children's Corner, CD 119, L. 113: No. 6, Golliwog's Cake Walk
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5274ae985043b9e04704f50f4059934bcfa9609dfe6ce4b72f5950b16d7522. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8804529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b1fdfb4548ad11a3ed571bf249693e9166f6072b75185acbe4cc97c0643699. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2002125.
Debussy: Beau soir, CD 84, L. 6 (Arr. Heifetz for Violin and Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e88e8116cd6d9d92bfac11a2fb56f89c57e1ef9a05bc91f3047b94493d8e103. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9802699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ef44d8f6c6cb302efd456496ed155593e6a0bee4300983a3fc9853afab6ba2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBDYG2000097.
Mathieu: Concerto de Québec & Works for 2 Pianos
Debussy: 2 Arabesques. L. 66: No. 1 in E Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60754a3fa09155e5f53d699a3ee5cb0f635784e83c95254f91bf3b195c2c7c3b. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1703145.
Ravel: Sonatine, M. 40: II. Mouvement de menuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541c25161ae58a4535b3ea99a9c0b3ddbee4a8b3e17aea5b67b844d068298747. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1703149.
Mathieu: Concerto No. 3 / Gershwin: An American in Paris
Rachmaninov: Piano Concerto No. 4 Op. 40 (Original 1926 version) - Scriabin: Prometheus, The Poem of Fire, Op. 60
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45c150eb86f78148f35e7bd4ef6c93fa0d0818bc1e3511913ef8e84a14158ed. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALC41100602.
Chausson – Concert; Mathieu – Trio & Quintette
L'enfant prodige: L'incroyable destinée d'André Mathieu (musique du film)
Mozart: Piano Concerto No. 23 / Symphony No. 41
Franck & Lekeu: Sonates - Mathieu: Ballade, Fantaisie
Andre Mathieu: Concerto No. 4, Orchestral Works
Schubert: Drei Klavierstücke / Rachmaninov: Neuf Études-Tableaux, Op.39
Cadenza - Three Centuries of Keyboard Music
Fidèles Insomnies (Blissfully Sleepless)
Concerto De Québec (Mathieu) / Warsaw Concerto (Addinsel) / Concerto In F (Gershwin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570743cecf9462421a606f6f5fa196a57c7b49349d87f52dd15824aed7deb6ad. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CAA500215601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bf641a8ff35c7abddc62b1d73ba897f4bdd47092d9b13b9e83452954d959ed. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2401085.
Paris Memories - Franck: Prélude, Fugue and Variation: I. Prelude
Op. 7: Preludes - Aux portes du destin, Pt.2 "pour mon ami Imad"
Corigliano: Concerto For Piano & Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56924b011fabda3b770e5afde400be70092983b7e034513d14ad900d251914f8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALC40600375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42d38567dc06b67e4117bc32fd9383f679b1f9aee02bb27be8b993ea5ba33bb. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/CALC41200541.