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 0x9b8bcc79df51f94a3d323a7da879a01b8e7723b669fecf62e150c182818a066d. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f938d3e7-8325-42a4-9439-9c5a03473c3d.json and https://artists.proofprofile.net/proofs/artist/f938d3e7-8325-42a4-9439-9c5a03473c3d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
50 Most Essential Classical Pieces (Volume 1)
The 50 Most Essential Pieces of Classical Music
Schubert: Rosamunde - Berg: Suite Lyrique, Quatuor Thymos, Salomé Haller & Christoph Eschenbach
Concerto for 2 Violins, Strings and Continuo in D Minor, BWV 1043: I. Vivace
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 0x29d084dafa7e12756dd827c64798b26a37f4cbbcbc3152c81bed4f17527b9b14. 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/USSJ10804243.
The Seasons, Op. 37b: VI. June: Barcarolle
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfe52904694b02b75e73cf72b1bfa2b6db2e770ef3028599a01a659bd8e82ad. 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/USSJ10804266.
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Orchestral Suite No. 3 in D Major, BWV 1068: II. Air
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Piano Concerto No. 3 in D Minor, Op. 30, III: Finale: Alla breve
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Orchestra Sinfonica di Milano Giuseppe Verdi
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Peer Gynt Suite No. 1, Op. 46: I. Morning Mood
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6320ff68845dee5001997ee8324d369beb84191ce50155fdab76e4238aca29d. 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/USSJ10804268.
Clarinet Concerto in A Major, KV 622: II. Adagio
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Bagatelle in A Minor, WoO 59 "Für Elise"
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String Quartet No. 1 In B-Flat Major, Op. 1: III. Adagio
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Swan Lake Suite, Op. 20: Scéne: Moderato
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The Marriage of Figaro, KV 492: Overture
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Requiem Mass in D Minor, K. 626: VIII. Lacrimosa
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Mass in B Minor, BWV 232, Credo: VI. Et resurrexit
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Peer Gynt, Suite No. 1, Op. 46: IV. In the Hall of the Mountain King: Alla marcia e molto marcato: Piu ivo
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Mascagni - Cavalleria rusticana: Intermezzo
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Piano Sonata No. 8 in C Minor, Op. 13 "Pathétique": II. Adagio Cantabile
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Quintet in A Major, Op. 114 "The Trout": II. Andante
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Etude in E Major, Op. 10, No. 3, "Tristesse"
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Brandenburg Concerto No. 5, BWV 1050: I. Allegro
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Well Tempered Clavier, Book I, BWV 846, Prelude and Fugue in C Major
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Concerto for Trumpet and Orchestra in E-Flat Major, III. Rondo
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Brandenburg Concerto No. 3 in G Major, BWV 1048: I. Allegro
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Piano Concerto No. 2 in C Minor, Op. 18: I. Moderato; Allegro
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Concerto Grosso in G Minor, Op. 6: 8 "Christmas Concerto": II. Allegro
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Serenade for Strings in C Major, Op. 48: III. Élégie: Larghetto elegiaco
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Concerto for Viola and Orchestra in G Major: I. Largo
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Rhapsody on a Theme of Paganini in A Minor for Piano & Orchestra, Op. 43
USSR Ministry Of Culture Symphony Orchestra
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"Jesu, Joy of Man's Desiring" from Mund und That und Leben BWV 147
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Concerto for Piano and Orchestra No. 21 in C Major, K. 467 "Elvira Madigan": II. Andante
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Symphony No. 6 in F Major, "Pastoral", Op. 68: II. Scene by the Brook - Andante molto mosso
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Suite No. 1 in G Major, BWV 1007: I. Prelude
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Hungarian Dances: No. 5 in G Minor: Allegro
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Symphony No. 94 in G Major, "Surprise": II. Andante
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On the Beautiful Blue Danube (An Der Schönen Blauen Donau), Op. 314
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Symphony No. 40 in G Minor, K. 550 "Great": I. Allegro molto
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Piano Concerto No. 2 in F Minor, Op. 21: III.Allegro vivace
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Piano Sonata No. 14 in C-Sharp Minor, Op. 27: 2 "Moonlight": I. Adagio Sostenuto
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Violin Concerto in D Major, Op. 61: III. Rondo. Allegro
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Orchestre de Chambre du Philharmonique de Lettonie
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Sonate No. 14: No. 1, Au clair de Lune-Adagio sostenuto
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Le Lac des Cygnes : La Danse des Petits Cygnes
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Most Relaxing Pachelbel Canon and Baroque Favorites in the Universe
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Chamber Orchestra of the Moscow Conservatory
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