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 0x639f13a0dd87fddabe37e4c840d660ea06a0b530a869b958359394c09f97900a. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72adbce6-2ead-4239-bc92-d767a6ad4a82.json and https://artists.proofprofile.net/proofs/artist/72adbce6-2ead-4239-bc92-d767a6ad4a82.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cello Concerto in E Minor, Op. 85: I. Adagio - Moderato
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 0xfdaae1446e493e6d8bbd609d94850966216f87d3d804694656194fcb33d6af7c. 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/HKI199809001.
Cello Suite No. 1 in G Major, BWV 1007: I. Prelude
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Cello Concerto in B Minor, Op. 104, B. 191: II. Adagio ma non troppo
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Cello Sonata in G Minor, Op. 65: III. Largo
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Piano Sonata No. 11 in A Major, K. 331: III. Alla turca: Allegretto
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Saint-Saens: Cello Concertos Nos. 1 and 2 / Suite, Op. 16
Cello Concerto No. 1 in A Minor, Op. 33: II. Allegretto con moto
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Carnival of the Animals: XIII. Le Cygne (The Swan) (arr. for cello and orchestra)
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A Guided Tour of the Romantic Era, Vol. 11
20 Years Of Classical Music: Naxos Anniversary Collection (Naxos Denmark)
Lakmé: Blumenduett (Lara Croft Tomb Raider): Lakme, Act I: Dome epais le jasmin, "Flower Duet"
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Liebestraume, S541/R211: No. 3. Nocturne in A-Flat Major
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13087f6d64bcd48a3291df7828f31aaa19665e80d44ade5c79e5a8d0ae6de8c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/HKI199240810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403fd6ae7d4ddaa66675d40b41459dd0f58ef8df3eba3be2a1777dae2963a50a. 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/HKI199622912.
Variations on an Original Theme, Op. 36, "Enigma": Variation 9. Nimrod (A. J. Jaeger)
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Andante: Romantic Music for Cello and Orchestra
12 Variations on 'Ah, vous dirai-je maman', K. 265 (Excerpt)
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Orchestral Suite No. 3 in D major, BWV 1068: II. Air
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Serenade No. 13 in G Major, K. 525, "Eine kleine Nachtmusik": I. Allegro
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Peer Gynt Suite No. 1, Op. 46: IV. In the Hall of the Mountain King
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Wiegenlied: Guten Abend, gut Nacht, Op. 49, No. 4 - Arr. for Orchestra by Anonymous
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Piano Sonata No. 10 in C Major, K. 330: I. Allegro moderato
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The Comedians, Op. 26: II. Galop: Presto
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3 Marches militaires, Op. 51, D. 733: No. 1 in D Major - Arr. for Orchestra by Armin Suppan
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Wiegenlied, D. 498 - Arr. for Orchestra by Anonymous
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The Nutcracker, Op. 71: Act II: No. 13, Waltz of the Flowers
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Orfeo ed Euridice, Act II: Dance of the Blessed Spirits - Arr. for Flute and Harp by Donald Sosin
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Also sprach Zarathustra, Op. 30, TrV 176: Introduction
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Kinderszenen, Op. 15: VII. Träumerei - Arr. for Orchestra by Anonymous
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Gymnopedie No. 1 - Arr. for Flute and Harp by Donald Sosin
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The Tale of Tsar Saltan: Flight of the Bumblebee
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50a800bebd54a43cbac644a7958fcad524041db634ba550ccc79734a59f5861. 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/HKI199257002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a9ddb69f0d3f6a0905b9dcc05e4a504ce6fad6783c2457b7716b31e97fc54d. 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/HKI199827005.
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Pavane pour une infante défunte, M. 19 - Arr. for Orchestra by Anonymous
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Swan Lake, Op. 20: Act IV: Finale (abridged)
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Le carnaval des animaux: XIII. Le Cygne - Arr. for Cello and Orchestra by Paul Vidal
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Suite for Variety Orchestra, "Jazz Suite No. 2": VI. Waltz 2
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Herz und Mund und Tat und Leben, BWV 147: No. 10, Chorale. Jesus bleibet meine Freude - Arr. for Piano by Myra Hess
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Piano Sonata No. 14 in C-Sharp Minor, Op. 27, No. 2, "Moonlight": I. Adagio sostenuto
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Pastoral Suite for Orchestra, Op. 19: II. Romance
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Flute Sonata in E-Flat Major, BWV 1031: II. Siciliano - Arr. for Flute and Harp by Donald Sosin
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21 Hungarian Dances, WoO 1: Hungarian Dance No. 5 - Arr. for Orchestra by Martin Schmeling
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Clarinet Concerto in A Major, K. 622: II. Adagio
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6 Pieces, Op. 32: No. 3. Rustle of Spring
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Copacabana - Arr. for Strings by Lars Kallin
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Gavotte double par Mr. Couperin: Gavotte double par Mr. Couperin (Bauyn Manuscript)
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20th Century France: Maurice Ravel, Jean-François Monnard & Alfred Desenclos