thumb|Pierre Lénert (2009) Pierre Lénert (born in 1966) is a French violist. An international concertist, he is first solo violist of the Orchestre de l'Opéra national de Paris. Biography Pierre Lé
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 0x7c1015e6e38eec558c25e81984b5a139d81185b0c9abd8a1283d2e292c5fcf22. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4c6f0ed-97f2-4322-a937-3c542587e53c.json and https://artists.proofprofile.net/proofs/artist/c4c6f0ed-97f2-4322-a937-3c542587e53c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Musique de chambre française pour harpe: Debussy, Ravel, Satie, Fauré & Ibert
Ravel: Introduction et allegro pour flûte, clarinette, harpe et quatuor à cordes, M. 46
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 0xd9c65bc2992d02f5517e02f70849c633ea948701854c958c5d0b63ba2ba38afb. 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/FRZ119301520.
Debussy: Danses pour harpe et cordes, CD 113, L. 103: No. 2, Danse profane
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e04c4896e523ad65686ec6eb5779f9e5d8b4b1a04380b9f81cf5e973c0cc068. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRZ119301540.
Ravel: Pavane pour une infante défunte, M. 19 (Arr. Maganini for Flute and Harp)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5999a72b24979df1f7f83365d043c7c0d13cf67a50474f9d0c5d29310ae75ce. 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/FRZ119301580.
Debussy: Sonata for Flute, Viola and Harp, CD 145, L. 137: II. Interlude. Tempo di minuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2c4ed8156f3405d44eb42d2938eeeef5487e8b45e47724fb78dc0313932a9a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FRZ119301620.
Chamber Music (Finnish): Century of Finnish Chamber Music (A)
Reinecke: Trios pour clarinette, alto & piano, 3 Phantasiestücke pour alto & piano
Henri Vieuxtemps: Intégrale de l'oeuvre pour alto et piano
Si la poésie m'était chantée: Œuvres pour voix d'alto, alto et piano (World Premiere Recordings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d55cb5dea27df318ab99be651010ea9b2fb358eb622961f4ade2ac1c81d929. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FROV61615302.
Drei Romanzen, Op. 94: II. Einfach, innig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d8655a5a401ad52fb8e371f3a7338813ac66d28f7346c297cc33577751bde1. 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/FROV61615303.
Fantasiestücke, Op.73: II. Lebhaft, leicht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6e2bc86df9f83878c2a2a78b70e50eac1ef81b2a260d4892d5666e277ba84e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FROV61615306.
Märchenerzählungen, Op.132: I. Lebhaff, nicht zu schnell
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6dfafba0c44bfc786d9a1b67da263992a41dfefe74a43fedbdc4bc5306aa39. 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/FROV61615312.
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
Spanisches Liederspiel, Op. 74: IV. In der Nacht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c3c5deaa9480eebf801a601916e965c56cb97adc4ffe31e2bce811bdc35c4c. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FROV61615316.
Nicolò Paganini: Pièces pour alto, guitare et violoncelle
Saint-Saëns : Le Carnaval des animaux - Ladmirault : Les Mémoires d'un âne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbf2cd85934e9fbdb8f5143ed6fbc8da1429568a4c75584a1ec13c804c74260. 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/FRZ179900620.
Hirten-Weihnacht: Panflöte, Gitarre, Harfe (Inspiration)
Ravel & Debussy: String Quartets [National Gallery Version]