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 0xcf59cbdf1fcbc1144b422ce5b0fea90eedd863f13aba45b99a7f63746e3b62f4. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f021115-12f2-404b-a9cb-db9cdb7e7ed7.json and https://artists.proofprofile.net/proofs/artist/6f021115-12f2-404b-a9cb-db9cdb7e7ed7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Symphony No. 5 in C Minor, Op. 67: I. Allegro con brio
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 0x37a423d07366e707877de8a98e3828b5dfcdb6fbf737615c166daa748a2c864a. 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/USSM12000665.
Piano Sonata No. 14 in C-sharp minor, Op. 27, No. 2, "Moonlight": I. Adagio sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826d66cfed3ef797b873376536e7d082a653e7a202b4ed2c70391275aa9860f1. 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/USSM11902399.
Piano Sonata No. 8 in C minor, Op. 13, "Pathétique": II. Adagio cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305ea2a91021da65a50dfe46a4a34b49ff64ecaf3b7b70e80257290c50e78953. 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/USSM11902373.
Lyceum Philharmonic at American Heritage School
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad1675c78d25730706d92f7389c3fa939d8c90f0b5a247193f29b9f945f2eb7. 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/USQX91201526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09b2864b0104131bed3a5f9af542fe0b7acbb62672e460f7c65c3f6238588b1. 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/USQX91201528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78835b6767f2b0bddd41e26a73288243c08f54d2cd4ec4198e99980190b40bf. 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/USQX91902587.
Symphony No. 8 in F Major, Op. 93: IV. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147a457c6007cbba0a8b124e8e7009121449270cf4ecf4b091a5a66fbf62b135. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM16300403.
Beethoven: Piano Concerto No. 5 in E-Flat Major, Op. 73 & Violin Concerto in D Major, Op. 61
Piano Concerto No. 5 in E-Flat Major, Op. 73 "Emperor": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffff3587e854a64fd7709c33db0c3b290389d4bfd297682587af295380ed2576. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USSM10209532.
Piano Concerto No. 5 in E-Flat Major, Op. 73 "Emperor": II. Adagio un poco mosso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855b7745a71bb93a0a7a5da1c47088183e67c2f8a760d81d867d9ea48a01f26d. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USSM10209533.
Piano Concerto No. 5 in E-Flat Major, Op. 73 "Emperor": III. Rondo. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfd62ca3f865d60426487b2a5756adc0d5ceba72aa03a5a306f679b0c99fb8a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USSM10209534.
Violin Concerto in D Major, Op. 61: I. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825458c40d5419669b673daa7cbe12403a8a2d85cd016ed8381c6f1372b643f5. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USSM10209529.
Violin Concerto in D Major, Op. 61: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9b6dd3e83e5db9491598c103d03b1b231cf8cb4449a3f977bff956402709c0. 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/USSM10209530.
Violin Concerto in D Major, Op. 61: III. Rondo. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4993de1662b71cab2082cd7c7b0bd30bd441834f61d417ae6b03a5dccc9495b. 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/USSM10209531.
Live Recital No. 3: Boston Symphony Orchestra's Harold Wright, Principal Clarinetist 1970-1993
Rondino in E-Flat Major for 2 Oboes, 2 Clarinets, 2 Bassoons and 2 Horns, WoO 25
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March for 2 Clarinets, 2 Bassoons and 2 Horns in B-flat Major, WoO 29
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28e36a99c485517986a8476623160f1a1945773bb7d403be79391ed7bdc7c25. 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/USSM10101899.
Duo for Clarinet and Bassoon in C Major, WoO 27 No.1: I. Allegro commodo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326b9e989549c48a80daad443cb30992608ab5c64778acdb01a5dc76ce15353b. 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/USSM10101900.
Schubert: Piano Quintet in A Major "Trout", Arpeggione Sonata in A Minor & Piano Trio in E-Flat Major "Notturno"
Piano Quintet in A Major, D. 667, Op. 114 "Trout": I. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc9b9fb04bc0846e9602c8b227b29e1f16105affc57710883b082ed85fd4d08. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19703934.
Piano Quintet in A Major, D. 667, Op. 114 "Trout": II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3303de1242ba9d3ae38e8b69f4c5bbabae277a5625baac2bbde9b974bff1c3c. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USSM19703935.
Piano Quintet in A Major, D. 667, Op. 114 "Trout": III. Scherzo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0597f7fa525bd0557d13e74e96b70816d9d0f8d8a85c8b3b24744840afb9ad. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USSM19703936.
Piano Quintet in A Major, D. 667, Op. 114 "Trout": IV. Tema con variazioni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04354dc4db43992925f9afbd22d641b3daf799e91b2e3b719cc95d2e72b57af5. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19703937.
Piano Quintet in A Major, D. 667, Op. 114 "Trout": V. Allegro giusto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4944242c1163c4553fc6cb8238db873ec1632789b27d9e53dbf51916685a4e99. 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/USSM19703938.
Arpeggione Sonata in A Minor, D. 821: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7ead059cc7c10051ad6e4eaf1b6143680da30c5f6cd40f1fbb2954735931a8. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USSM19703939.
Schubert: The Piano Trios; Piano Quintet "The Trout"; String Quintet; Octet D 803; Arpeggione Sonata etc.
Mozart: A Musical Joke; Clarinet Quintet; Horn Quintet; Kegelstatt Trio; String Quintets Nos. 3 & 4 etc.
Symphony No. 9 in D Minor, Op. 125: IV. Presto - Allegro molto assai - Andante maestoso - Allegro energico, sempre ben marcato
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Piano Concerto No. 21 in C Major, K. 467: II. Andante
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Serenade No. 13 in G Major, K. 525 "Eine kleine Nachtmusik": II. Romanze. Andante
Carl Philipp Emanuel Bach Chamber Orchestra
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Piano Sonata No. 11 in A Major, K. 331: I. Tema con variazione. Andante grazioso
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Serenade No. 10 in B-Flat Major, K. 361 "Gran partita": III. Adagio
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Symphony No. 41 in C Major, K. 551 "Jupiter": III. Menuetto. Allegretto
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Adagio in C Major, K. 356 (Arr. for Guitar)
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Serenade No. 9 in D Major, K. 320 "Posthorn": III. Concertante. Andante grazioso
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Concerto for Flute & Harp in C Major, K. 299: II. Andantino
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Piano Sonata No. 12 in F Major, K. 332: I. Allegro
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Clarinet Quintet in A Major, K. 581: IV. Allegretto con variazioni
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Piano Concerto No. 10 for 2 Pianos in E-Flat Major, K. 365: III. Rondo. Allegro
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Liszt: Via Crucis, S. 53 - La Notte, S. 112/2
Via Crucis, S. 53: Einleitung. Vexilla Regis
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Via Crucis, S. 53: Station I. Jesus wird zum Tode verdammt
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Via Crucis, S. 53: Station IV. Jesus begegnet seiner heiligen Mutter
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Via Crucis, S. 53: Station V. Simon von Kyrene hilft Jesus das Kreuz tragen
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Via Crucis, S. 53: Station VI. Sancta Veronica
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Via Crucis, S. 53: Station IX. Jesus fällt zum dritten Mal
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Via Crucis, S. 53: Station X. Jesus wird entkleidet
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Messiaen: Quartet for the End of Time; Et Expecto Resurrectionem Mortuorum
Quatuor pour la fin du temps: 1. Liturgie de cristal
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Quatuor pour la fin du temps: 8. Louange à l'Immortalité de Jésus
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Antheil: Ballet Mécanique; A Jazz Symphony; Violin Sonata No. 1; Violin Sonata No. 2 (Netherlands Wind Ensemble: Complete Philips Recordings, Vol. 16)
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Piano Trio in C Major, Hob. XV:27: I. Allegro
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Piano Trio in C Major, Hob. XV:27: II. Andante
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Piano Trio in C Major, Hob. XV:27: III. Finale. Presto
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Beethoven - The 50 Best Classical Masterpieces
Beethoven: Piano and Violin Concertos & Cello Sonatas
Sonata concertante / Sonata per violino e pianoforte / Arcana
Beethoven: Piano Trios, Op.97 "Archduke" and Op.70, No.1 "Ghost"
Chamber Music (The Complete Matthijs Vermeulen Edition)
W. A. Mozart: Sinfonia Concertante in E flat Major, Concertone in C Major & Sinfonia Concertante in A Major