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 0x46ae838590021deaeb24a6fde804fc8c191902513521d601ce6d7ebaddd02bf5. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/239fbe36-5007-4388-bbc3-6ae81a2373c1.json and https://artists.proofprofile.net/proofs/artist/239fbe36-5007-4388-bbc3-6ae81a2373c1.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Flute Concerto No. 1 in G, K.313: 1. Allegro maestoso
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 0xc626661cedf49e59e7b48296dce814a96a47abe89eb8d60926d165c6ab96926a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLA507528201 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155ddc51ba11afe119ed05de4b977c9536adfe8c9a91bf73b721899fea30211e. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/NLA506900190 — a six-check JSON result.
Flute Concerto No. 1 in G, K.313: 2. Adagio non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f86e8da9a2721c25950612ddaf21d32b45c39d492eaaad8f2b2295dca7f55e4. 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/NLA507528202 — a six-check JSON result.
Flute Quartet in D, K.285: 2. Adagio - (attacca)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2677c2bf55c21439770ab60778fa0f1beb9b383efb66cdcb7232cee7d406c6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506900191 — a six-check JSON result.
Flute Concerto No. 1 in G, K.313: 3. Rondo (Tempo di Menuetto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce814a8c4371d4f0c0ca983ddd4a052599c5ca9107d7138aff379d0d5b261e75. 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/NLA507528203 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe642bd27b17fb36598263188c41e71e6c8b48f78f4f1c3da10ecd857e591b167. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/NLA506900192 — a six-check JSON result.
Flute Concerto No.2 in D, K.314: 1. Allegro aperto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0eeface244403a889b30ad93929658f92eefecf100c267b79ea2e73c8bc4dd. 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/NLA507528204 — a six-check JSON result.
Flute Quartet in A, K.298: 1. Thema (Andante) con variazioni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7914ecff2c464b35e31d0e7baa881391bc9b3705f1cc45d1ac2bc012924d06f5. 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/NLA506900193 — a six-check JSON result.
Flute Concerto No.2 in D, K.314: 2. Andante ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc126706081f6b7b27431a21e92e14560b6c4d044efe0aadec9ad51e9780303d3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA507528205 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f983fd413e8e7cf87f245c855be831619598d692cf484d39bed18308a629b2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLA506900194 — a six-check JSON result.
Flute Concerto No.2 in D, K.314: 3. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd028bdc9918cad5a97f7410f045c5603fac220882c5c8d30ed0760acbcf09145. 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/NLA507528206 — a six-check JSON result.
Flute Quartet in A, K.298: 3. Rondeau (Allegretto grazioso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81cc4acef2726f107349f037a3d1310637c6c20b4c5bd91adbaaa5b4b86750a. 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/NLA506900195 — a six-check JSON result.
Andante for Flute and Orchestra in C, K.315
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Concerto for Flute, Harp, and Orchestra in C, K.299: 1. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017f51362de533767679bf88a0eb2ddbaabc188d207af501be686458347e4717. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLA506400183 — a six-check JSON result.
Concerto for Flute, Harp, and Orchestra in C, K.299: 2. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c96e45d0e9f5b25964763e4cc90708765523c2a9f61e11d19439cda4c3ceca. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/NLA506400184 — a six-check JSON result.
Flute Quartet No. 2 in G, K.285a: 1. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7af49d091501a9cffbd64ea74453bddd5f5c09b4d752bf256acb09ce6df842f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506900198 — a six-check JSON result.
Concerto for Flute, Harp, and Orchestra in C, K.299: 3. Rondo (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2574f352fb3bd940d45a90884217a63ebdf7905d7fe8bf8c7686c4bd206190. 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/NLA506400185 — a six-check JSON result.
Flute Quartet No. 2 in G, K.285a: 2. Tempo di menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad57bb47506bfed282fb93558403e7afd0480d0391efe26879bbb23c316b12fc. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506900199 — a six-check JSON result.
Mozart: Flute Concertos; Symphonies 39, 40, 25, 29, 32
Symphony No. 40 in G Minor, K.550: 1. Molto allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e1e28bb091adc7dfd690b56de0f564a51c2b1d862bb40ed68a456f2fc71f58. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/NLA506100255 — a six-check JSON result.
Mozart: Quatuors pour flûte (Mono Version)
Bach: Suites orchestrales Nos. 1 & 2 (Mono Version)
Bach: The Four Orchestral Suites by Eduard van Beinum (2022 Remastered, Amsterdam 1956)
Serenade No. 13 in G Major, K. 525, "Eine kleine Nachtmusik"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758190d8704809b954f52d4983809641525d9579e4d845a62884812116b4a90b. 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/USA560794419 — a six-check JSON result.
Piano Concerto No. 23 in A Major, K. 488: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb948c3e3ccfb678710cbc422491ae527e567e83e3b4237b67a76281bf75f1ddb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560794420 — a six-check JSON result.
Flute Concerto No. 2 in D Major, K. 314: I. Allegro aperto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584ce46f6a6880209200ece023cd2db28a0404140a4426aed27f59f500369ca8. 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/USA560794421 — a six-check JSON result.
Symphony No. 40 in G Minor, K. 550 "Great": I. Molto allegro
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The Marriage of Figaro, K. 492: Overture
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Clarinet Concerto in A Major, K. 622: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3e7de52df4806d7e4b8b27f4fec1637b1ef524301db4d60f79d245343b1ba5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560794424 — a six-check JSON result.
Serenade No. 11 in E-Flat Major, K. 375: III. Adagio
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Piano Sonata No. 11 in A Major, K. 331, "Turkish March": III. Rondo: Alla turca (Allegretto)
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Horn Concerto No. 3 in E-Flat Major, K. 447: I. Allegro
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Cassation in B-Flat Major, K. 99: VI. Menuet
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Requiem in D Minor, K 626: I. Introitus: Requiem aeternam
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Requiem in D Minor, K 626: II. Kyrie eleison
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Concerto for Piano & Orchestra No. 9 in E-Flat Major, K. 271, "Jeunehomme": I. Allegro
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Requiem in D Minor, K 626: III. Sequentia: Dies irae
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Serenade No. 7 in D Major, K. 250, "Haffner": I. Allegro maestoso - Allegro molto
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Serenade No. 7 in D Major, K. 250, "Haffner": II. Andante
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Serenade No. 7 in D Major, K. 250, "Haffner": III. Menuetto
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Serenade No. 7 in D Major, K. 250, "Haffner": IV. Rondo: Allegro
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Serenade No. 7 in D Major, K. 250, "Haffner": V. Menuetto galante
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Serenade No. 7 in D Major, K. 250, "Haffner": VI. Andante
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Serenade No. 7 in D Major, K. 250, "Haffner": VII. Menuetto
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Requiem in D Minor, K 626: IV. Sequentia: Tuba mirum
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Violin Concerto No. 3 in G Major, K. 216: I. Allegro
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Divertimento No. 17 in D Major, K. 334: III. Menuetto
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Symphony No. 35 in D Major, K. 385 "Haffner": I. Allegro con spirito
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Requiem in D Minor, K 626: VIII. Sequentia: Lacrimosa dies illa
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Don Giovanni, K. 527, Act I: "Notte e giorno faticar"
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Don Giovanni, K. 527, Act II: "Ma qual mai s' offre, oh Dei"
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Don Giovanni, K. 527, Act I: "Ho capito, signor si"
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Don Giovanni, K. 527, Act II: "Oh statua gentilissima"
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Eduard van Beinum - Philips Recordings 1954-1958
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Ravel: Daphnis et Chloé Suites Nos. 1 & 2; Ma mère l'oye
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Le tombeau de Couperin, M. 68: III. Menuet
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Ma mère l'oye, M. 62: Prélude. Très lent
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Ma mère l'oye, M. 62: Apothéose. Le jardin féerique. Lent et grave
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Daphnis et Chloé, Suite No. 1, M. 57a: I. Nocturne
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Daphnis et Chloé, Suite No. 1, M. 57a: II. Interlude
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Daphnis et Chloé, Suite No. 1, M. 57a: III. Danse guerrière
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Daphnis et Chloé, Suite No. 2, M. 57b: I. Lever du jour
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Daphnis et Chloé, Suite No. 2, M. 57b: II. Pantomime
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Daphnis et Chloé, Suite No. 2, M. 57b: III. Danse générale
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Concertino for Harp and Chamber Orchestra, Op. 93: 2. Andante (Quasi recitativo)
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Concertino for Harp and Chamber Orchestra, Op. 93: 3. Finale spagnolo (Ritmo di jota)
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Ravel: Orchestral Music - Boléro/Ma Mère l'Oye etc.
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Miroirs, M. 43: IV. Alborada del gracioso, M. 43c
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Ma mère l'oye, M. 62: Les entretiens de la belle et de la bête. Mouvement de Valse. Modéré
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Ravel: Boléro; Rapsodie espagnole; Daphnis et Chloé Suite No. 2; Pavane pour une infante défunte
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Classical Digitally Remastered: Wolfgang Amadeus Mozart
Bach, J.S.: St. Matthew Passion (Mengelberg) (1939)
Wolfgang Amadeus Mozart : Classical Favorites
Mozart Edition, Vol. 3: Instrument Concertos
Klemperer Rarities: Amsterdam, Vol. 12 (1950-1956)
St. Matthew Passion, BWV 244: Part I: Kommt, ihr Tochter, helft mir klagen! (Chorus)
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St. Matthew Passion, BWV 244: Part I: Chorale: Herzliebster Jesu, was hast du verbrochen
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