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 0x670de2ab5d25dfd9f4db515287875784042e55c94965620d83cc916cc5e00e5f. Chain 2 (Bitcoin): anchored in block 954055 (2026-06-17T05:51:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/444fabb8-a72f-460e-9cdf-dcf4c2df8960.json and https://artists.proofprofile.net/proofs/artist/444fabb8-a72f-460e-9cdf-dcf4c2df8960.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vivaldi / Weber / Marcello: Trombone and Tuba
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 0x69340504da669b1c9b67a038314af1d349b8861e93b2f9510417f7a339fa9b73. 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/SEAGA1502601.
Sensommarnätter, Op 33: I. Tranquillo e soave
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Sensommarnätter, Op 33: III. Piano - Non troppo lento
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Sensommarnätter, Op 33: IV. Presto agitato
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Sensommarnätter, Op 33: V. Poco allegretto
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Piano Concerto No. 1 in E Minor, Op. 10: I. Allegro energico
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Piano Concerto No. 1 in E Minor, Op. 10: II. Andante ma non troppo
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Piano Concerto No. 1 in E Minor, Op. 10: III. Allergo vivace
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Piano Concerto No. 2, Op. 17: I. Poco rubato - Tempo ritmico
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Piano Concerto No. 2, Op. 17: II. Tempo liberato - Andantino
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Piano Concerto No. 2, Op. 17: III. Allegro frenetico
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Pettersson: Vox Humana / Rosenberg: Dagdrivaren
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Le quattro stagioni (The Four Seasons), Op. 8 - Concerto No. 4 in F Minor, RV 297, "L'inverno" (Winter): I. Allegro non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd434677f1ffec7fd871043a10981306c4ec20d381a672446cfe83325342ccb25. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/SEWDL0727810.
Suite No. 5 in C Minor for Solo Cello, BWV 1011: IV. Sarabande
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Music for Strings, Percussion and Celesta, Sz 106: I. Andante tranquillo
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Pro et Contra - Concerto for Cello and Orchestra (1966): III. Allegro
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Praeludium and Allegro in the style of Pugnani (1910)
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Concerto Grosso No. 8 in G Minor, Op. 6, "Christmas Concerto": Allegro
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Symphony No. 3 for Soprano and Orchestra, "Symphony of Sorrowful Songs" (1976): I. Lento - Sostenuto tranquillo ma cantabile
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Partita No. 2 in D Minor for Solo Violin, BWV 1004: V. Chaconne
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Concerto grosso No. 6 in G Minor, HWV 324: I. Largo e affettuoso
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String Quartet No. 8 in C Minor, Op. 110: I. Largo (attacca)
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String Quartet No. 8 in C Minor, Op. 110: II. Allegro molto (attacca)
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Le quattro stagioni (The Four Seasons), Op. 8 - Concerto No. 2 in G Minor, RV 315, "L'estate" (Summer): III. Presto: Tempo impetuoso d'Estate
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Suite No. 2 in D Minor for Solo Cello, BWV 1008: IV. Sarabande
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L'Estro Armonico, Op. 3 - Concerto No. 8 in A Minor for Two Violins and Strings, RV 522: I. Allegro
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Sonata for Solo Viola, Op. 25 (1922): IV. Rasendes Zeitmass. Wild. Tonschönheit ist Nebensache
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Adagio in G Minor for Strings and Organ, "Albinoni's Adagio"
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Concerto No. 1 in E-Flat Major for Cello and Orchestra, Op. 107: I. Allegretto
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Concerto Grosso No. 10 in D Minor, HWV 328: I. Overture: Allegro
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Cantus in Memoriam Benjamin Britten for Strings and Bell (1977)
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Le quattro stagioni (The Four Seasons), Op. 8 - Concerto No. 4 in F Minor, RV 297, "L'inverno" (Winter): III. Allegro
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Double Concerto in D Minor for Two Violins, BWV 1043: Vivace
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Piano Quartet No. 3 in C Minor, Op. 60: I. Allegro ma non troppo
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Chaconne in G Minor for Violin and Piano
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String Quartet No. 3 in F Major, Op. 73: II. Moderato con moto
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Concerto No. 2 in C-Sharp Minor for Violin and Orchestra, Op. 129: II. Adagio (attacca), III. Adagio - Allegro
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String Sextet in D Minor, Op. 70, "Souvenir de Florence": III. Allegretto moderato
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Concerto per cordes, Op. 33: IV. Finale furioso
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Cello Concertino, Op. 45, No. 10: II. Siciliano: Andante sostenuto
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Double Bass Concertino, Op. 45, No. 11: II. Arioso. Lento
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Double Bass Concertino, Op. 45, No. 11: III. Finale. Allegro vivace
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Trombone Concertino, Op. 45 No. 7: I. Preludium: Allegro pomposo
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Trombone Concertino, Op. 45 No. 7: II. Aria. Andante sostenuto
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Trombone Concertino, Op. 45 No. 7: III. Finale. Allegro giocoso
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Two Sentimental Romances for Violin and Orchestra, Op. 28: No. 1 in A Major
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Assaggio in A Major for Solo Violin, BeRl 301: I. Andante
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Assaggio in A Major for Solo Violin, BeRl 301: II. Allegro
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Assaggio in A Major for Solo Violin, BeRl 301: III. Moderato
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Assaggio in A Major for Solo Violin, BeRl 301: IV. Allegro assai
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Violin Sonata No. 2 in G Major for Violin and Piano: I. Allegro moderato
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Violin Sonata No. 2 in G Major for Violin and Piano: II. Lento
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Violin Sonata No. 2 in G Major for Violin and Piano: III. Allegro con fuoco
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Violin Concerto No. 2: I. Allegro moderato
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Sonata No. 1 for Solo Violin, Op. 12: I. Largo ed appasionato - Allegro
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Sonata No. 1 for Solo Violin, Op. 12: II. Andante con variazioni
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Duo in D Major for Violin and Piano: I. Allegro
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Duo in D Major for Violin and Piano: II. Romance: Andante
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Duo in D Major for Violin and Piano: III. Allegro giocoso
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Violin Sonata No. 4 in B Minor, Op. 47: I. Andante espressivo
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Violin Sonata No. 4 in B Minor, Op. 47: II. Scherzo vivacissimo
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Violin Sonata No. 4 in B Minor, Op. 47: III. Andante con moto
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Violin Sonata No. 4 in B Minor, Op. 47: IV. Allegro vivace
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Assaggio in C Minor for Solo Violin, BeRl 310: I. Grave
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Assaggio in C Minor for Solo Violin, BeRl 310: II. Allegro
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Assaggio in C Minor for Solo Violin, BeRl 310: III. Lento
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Assaggio in C Minor for Solo Violin, BeRl 310: IV. Allegro non troppo
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Sonata No. 2 for Two Violins: Allegro con allegrezza - Moderato - Allegro veloce
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Suite No. 1 for Violin and Piano, "in modo antico": I. Intonation - Andante moderato
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Suite No. 1 for Violin and Piano, "in modo antico": II. Menuett - Allegretto poco vivo
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Suite No. 1 for Violin and Piano, "in modo antico": III. Sarabande - Largamente
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Suite No. 1 for Violin and Piano, "in modo antico": IV. Tambourin - Allegretto poco rubato
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Sonata No. 2 for Solo Violin: I. Moderato energico
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Sonata No. 2 for Solo Violin: II. Allegro moderato
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Sonata alla leggenda for Violin and Piano: I. Allegro moderato
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Sonata alla leggenda for Violin and Piano: II. Andante
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Sonata alla leggenda for Violin and Piano: III. Scherzo - Vivace ma discrezione
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Sonatina for Violin and Piano, Op. 15: I. Allegro
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Sonatina for Violin and Piano, Op. 15: II. Andantino
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Sonatina for Violin and Piano, Op. 15: III. Vivace
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Two Sentimental Romances for Violin and Orchestra, Op. 28: No. 2 in F Minor
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Violin Sonata in A Minor, Op. 1: I. Allegro moderato ed energico
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Violin Sonata in A Minor, Op. 1: II. Andante cantabile
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Violin Sonata in A Minor, Op. 1: III. Allegro ma non troppo
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Davids nimm (Version for 3 Treble Voices)
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Emil Sjögren: 100 Year Commemorative Collection
Poéme in C Major for Violin and Piano, Op. 40
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From Julius Wolff's Tannhäuser, Op. 12: Jahrlang möcht' ich so Dich halten
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Violin Sonata No. 1 in G Minor, Op. 19: I. Allegro vivace
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Violin Sonata No. 1 in G Minor, Op. 19: II. Andante
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Violin Sonata No. 1 in G Minor, Op. 19: III. Finale
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Violin Sonata No. 2 in E Minor, Op. 24: I. Allegro moderato
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Violin Sonata No. 2 in E Minor, Op. 24: II. Allegretto scherzando
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Violin Sonata No. 2 in E Minor, Op. 24: III. Andante sostenuto
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Violin Sonata No. 2 in E Minor, Op. 24: IV. Con fuoco
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Violin Sonata No. 3 in G Minor, Op. 32: I. Allegro moderato
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Violin Sonata No. 3 in G Minor, Op. 32: II. Allegro vivace
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Violin Sonata No. 3 in G Minor, Op. 32: III. Molto andante
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Violin Sonata No. 3 in G Minor, Op. 32: IV. Allegro assai - Allegro energico
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Two Lyric Pieces: I. Andantino quasi allegretto
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Sinfonia Concertante for Cello and Orchestra: I. Grave
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Sinfonia Concertante for Cello and Orchestra: II. Allegro bucolico
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Sinfonia Concertante for Cello and Orchestra: III. Lento
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Concertino for Cello and Strings, Op. 45: I. Allegro moderato
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Concertino for Cello and Strings, Op. 45: II. Siciliano: Andante sostenuto
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Concertino for Cello and Strings, Op. 45: III. Allegro moderato ma ritmico
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Cello Concerto: II. Tema con variazioni (Andante)
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Cello Concerto No. 2: I. Allegro moderato
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Largo in F Major for Cello and Basso Continuo
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Natanael Berg: Suite from "Birgitta" - Piano Concerto in C-Sharp Minor - Symphony No. 4 "Pezzo Sinfonico"
Agrell, Linde, Carlstedt, Börtz & Larsson: Works for Orchestra
Larsson: Pastoral Suite - Söderman: Swedish Festival Music - Lundquist: Violin Concerto
Sinfonietta for Strings, Op. 10: I. Allegro
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Ginastera, Gershwin, Barber, Villa-Lobos & Ives
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Josef Otto Af Sillen: Violin Concerto in E Minor
Sandström: Piano Concerto / Hammerth: Piano Concerto No. 1