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 0x675f110b124522813655376fb0d3062fb9ab504610df70eab0d2e72380de27c5. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eec89cc4-d405-421d-a242-f495ded9d292.json and https://artists.proofprofile.net/proofs/artist/eec89cc4-d405-421d-a242-f495ded9d292.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kagel: Stücke der Windrose, Phantasiestück
Vivier: Lonely Child; Prologue pour un Marco Polo; Bouchara; Zipangu
Ruth Crawford Seeger: Music for Small Orchestra; Study in Mixed Accents; Three Songs; Three Chants; String Quartet; Two Ricercari; Andante for String Orchestra; Rissolty Rossolty; Suite for W
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 0x5e9aa08ad612afc60ddf8e45acc8feae8ce9f37024a13979fa8981ed74a6ac42. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059604440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9a64861b2544c45c1e5a3cdf44086ef91f7a8e48f8c8f05faa7bba08fe37f0. 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/DEF059604450.
Goehr: Colossos or Panic, The Deluge & Little Symphony
Ligeti : Project Vol.1 - Melodien, Chamber Concerto, Piano Concerto & Mysteries of the Macabre
Ligeti : Project Vol.5 - Ballad & Dance, Cello Sonata, Artikulation, Aventures, Nouvelles Aventures, Musica Ricercata, Big Turtle Fanfare & Régi magyar társas táncok
Metamorphosis (Classical Meets Jazz and Modern)
Nas & Namavar & Van Vlijmen & Jeths: To You
Ligeti : Project Vol.3 - Cello Concerto, Clocks & Clouds, Violin Concerto & Síppal, Dobbal, Nádihegedüvel
Górecki: Kleines Requiem für eine Polka etc.
Gubaidulina: Jetzt immer Schnee; Perception
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775f4b48be085fe51c1048ebf9204a95185af18547b7daed7a4ee77d0d439ad0. 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/NLA509407405.
Schönberg: Pierrot Lunaire, Op.21 - Suite, Op.29
Schoenberg: Verklärte Nacht; String Trio; Phantasy
Ligeti : Project Vol.4 - Hamburg Concerto, Double Concerto, Requiem & Ramifications
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Ligeti: Hamburg Concerto: II. Signale, Tanz, Choral
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Ligeti: Hamburg Concerto: IV. Solo, Intermezzo, Mixtur, Kanon
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Ligeti: Requiem: I. Introitus. Sostenuto
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Ligeti: Requiem: II. Kyrie. Molto espressivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66d96bab8a77521d780d3d84e409e83afef8a166c4bfad1d8f80e419318c95b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEA800300350.
Ligeti: Requiem: III. De die judicii sequentia. Subito. Agitato molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53c02482e8a6eb14f3ac160e05e1d3c8bf17b2fce750d5aaf4f6e49aa43ac83. 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/DEA800300351.
Music for Mallet Instruments, Voices and Organ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952532becb5ba420fadf6f9400b58c9d577725f0d60348bac3c323040173c995. 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/USNO19022005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823c3c30e5351f12f6eff34b1aefefa34f24edbf73c167fc3280f93110cccbd6. 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/USN019745102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273c20e4db319d98378511265bf807fa9df897b6930760a521aefc0825e4d68c. 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/USNO19745117.
Milhaud & Ysaÿe & Hindemith: Viola Concerto No. 1 / Quatre Visages / Viola Solo Sonatas
Metamorphosis: Classic Meets Jazz & Modern
M is for Man, Music, Mozart: The Eisenstein Song
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Hallelujah II / La disciplina dei sentimenti / The Last Diary
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823c3c30e5351f12f6eff34b1aefefa34f24edbf73c167fc3280f93110cccbd6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USN019745102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95af8b163def7b5f6011dc3daf6ec7718495681315c8e63639495d2c3b189d31. 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/USNO18716902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e08f0a29b27ff640f1691c2d8d4f32730bca0c17e2a9546737dd09d9d7c8c8. 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/USNO18716903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898ae7df57923271ea9e003ca8977cce957fef2bde2af42ba0a00db00151675b. 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/USNO18716904.
The Four Sections: I. Strings (With Winds and Brass)
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cc5a99e2f97abd7e6ad36dad6f6c82668cc63347efa40d862c63e4d071e7d9. 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/USNO19022002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0696d4cd02c1e23d956add3fef79b4eafdb4eb9b2839b228e7f236048c5cbd87. 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/USNO19022004.
Zimmermann - The Love for Three Oranges - Mozart, Bach, Beethoven, Paganini, Prokofiev
Mozart: Violin Sonata No. 22 in A Major, K. 305: I. Allegro di molto
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Mozart: Violin Sonata No. 22 in A Major, K. 305: II. (a) Tema. Andante grazioso
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Mozart: Violin Sonata No. 22 in A Major, K. 305: II. (b) Variation I
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Mozart: Violin Sonata No. 22 in A Major, K. 305: II. (c) Variation II
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Mozart: Violin Sonata No. 22 in A Major, K. 305: II. (d) Variation III
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Mozart: Violin Sonata No. 22 in A Major, K. 305: II. (e) Variation IV
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Mozart: Violin Sonata No. 22 in A Major, K. 305: II. (f) Variation V
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Mozart: Violin Sonata No. 22 in A Major, K. 305: II. (g) Variation VI
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Prokofiev: The Love for Three Oranges, Op. 33: March (Arr. Heifetz for Violin and Piano)
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Paganini: 24 Caprices, Op. 1: No. 5 in A Minor
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Paganini: 24 Caprices, Op. 1: No. 9 in E Major "The Hunt"
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Bach, JS: Violin Concerto No. 1 in A Minor, BWV 1041: I. —
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Beethoven: Violin Concerto in D Major, Op. 61: I. Allegro ma non troppo (Cadenza by Kreisler), Pt. 1
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Beethoven: Violin Concerto in D Major, Op. 61: I. Allegro ma non troppo (Cadenza by Kreisler), Pt. 2
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Beethoven: Violin Concerto in D Major, Op. 61: I. Allegro ma non troppo (Cadenza by Kreisler), Pt. 3
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Beethoven: Violin Concerto in D Major, Op. 61: I. Allegro ma non troppo (Cadenza by Kreisler), Pt. 4
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Beethoven: Violin Concerto in D Major, Op. 61: I. Allegro ma non troppo (Cadenza by Kreisler), Pt. 5
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Beethoven: Violin Concerto in D Major, Op. 61: I. Allegro ma non troppo (Cadenza by Kreisler), Pt. 6
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Beethoven: Violin Concerto in D Major, Op. 61: I. Allegro ma non troppo (Cadenza by Kreisler), Pt. 7
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Beethoven: Violin Concerto in D Major, Op. 61: I. Allegro ma non troppo (Cadenza by Kreisler), Pt. 8
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Beethoven: Violin Concerto in D Major, Op. 61: I. Allegro ma non troppo (Cadenza by Kreisler), Pt. 9
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Beethoven: Violin Concerto in D Major, Op. 61: I. Allegro ma non troppo (Cadenza by Kreisler), Pt. 10
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Beethoven: Violin Concerto in D Major, Op. 61: I. Allegro ma non troppo (Cadenza by Kreisler), Pt. 11
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Beethoven: Violin Concerto in D Major, Op. 61: I. Allegro ma non troppo (Cadenza by Kreisler), Pt. 12
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Beethoven: Violin Concerto in D Major, Op. 61: II. Larghetto (Cadenza by Kreisler), Pt. 1
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Beethoven: Violin Concerto in D Major, Op. 61: II. Larghetto (Cadenza by Kreisler), Pt. 2
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Beethoven: Violin Concerto in D Major, Op. 61: II. Larghetto (Cadenza by Kreisler), Pt. 3
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Beethoven: Violin Concerto in D Major, Op. 61: II. Larghetto (Cadenza by Kreisler), Pt. 4
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Beethoven: Violin Concerto in D Major, Op. 61: II. Larghetto (Cadenza by Kreisler), Pt. 5
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Beethoven: Violin Concerto in D Major, Op. 61: III. Rondo. Allegro (Cadenza by Kreisler), Pt. 1
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Beethoven: Violin Concerto in D Major, Op. 61: III. Rondo. Allegro (Cadenza by Kreisler), Pt. 2
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Beethoven: Violin Concerto in D Major, Op. 61: III. Rondo. Allegro (Cadenza by Kreisler), Pt. 3
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Beethoven: Violin Concerto in D Major, Op. 61: III. Rondo. Allegro (Cadenza by Kreisler), Pt. 4
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Beethoven: Violin Concerto in D Major, Op. 61: III. Rondo. Allegro (Cadenza by Kreisler), Pt. 5
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Glazunov: Violin Concerto in A Minor, Op. 82: II. Andante
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Glazunov: Violin Concerto in A Minor, Op. 82: III. Tempo I - Più animato - Tranquillo
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Prokofiev: 5 Mélodies, Op. 35bis: No. 1, Andante
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Prokofiev: 5 Mélodies, Op. 35bis: No. 2, Lento, ma non troppo
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Prokofiev: 5 Mélodies, Op. 35bis: No. 5, Andante non troppo
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