Hans Sitt (born Jan Hanuš Sitt on 21 September 1850, Prague – 10 March 1922, Leipzig), was a Bohemian violinist, violist, teacher, and composer. During his lifetime, he was regarded as one of the fore
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 0x15884b057dd57cd24fbbf41e7d9b3812aabb9f3293433e8eac2a4f6231a523ac. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9d18dfe-e51f-4d7e-894d-f695cb9b7127.json and https://artists.proofprofile.net/proofs/artist/e9d18dfe-e51f-4d7e-894d-f695cb9b7127.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8ca79ff69bf760036f3f794dba288edb35d91b48256183655ccc61896625aa. 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/QZNWY2482671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3ff46a21c4d0ec052c8c66adad61e85d6614d3d98330cd8d4ab4b773b8b386. 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/QZNWY2482672.
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Albumblätter, Op. 39: No. 2, Andante sostenuto
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Hans Sitt: Phantasiestüke und Albumblätter [Bratsche und Klavier (Viola Repertoire)]
Sitt: Albumblätter, Op. 39: No. 2, Andante Sostenuto
Short Stories - A Collection of Romantic Violin Pieces
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Peer Gynt-Suite Nr. 1, Op. 46: I. Morning mood
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Peer Gynt-Suite Nr. 1, Op. 46: IV. In the Hall of the Mountain King
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Maria Stuart i Skotland (arr. J. Halvorsen): Valse Caprice
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Norwegian Dances, Op. 35: No. 2 in A Major
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Student Violin Concertos: Conciertos para Violín y Piano
Küchler: Violin concertino Op. 11 in G Major: I. Allegro moderato
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Küchler: Violin concertino Op. 11 in G Major: II. Andante
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Küchler: Violin concertino Op. 11 in G Major: III. Rondo: Allegro
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Küchler: Violin concertino Op. 12 in D Major: I. Allegro moderato
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Küchler: Violin concertino Op. 12 in D Major: II. Andante cantabile
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Küchler: Violin concertino Op. 12 in D Major: III. Rondo: Allegreto
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Küchler: Violin concertino Op. 15 in D Major: I. Allegro moderato
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Küchler: Violin concertino Op. 15 in D Major: II. Siciliano / III. Allegro assai
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Rieding: Violin concertino in Hungarian Style Op. 21 in A Minor: Andante sostenuto - Allegro moderato
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Seitz: Student concerto No. 5, Op. 22 in D Major: I. Allegro moderato
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Seitz: Student concerto No. 5, Op. 22 in D Major: II. Andante cantabile
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Seitz: Student concerto No. 5, Op. 22 in D Major: III. Rondo: Allegreto
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Rieding: Violin concertino Op. 24 in G Major: I. Allegro moderato
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Rieding: Violin concertino Op. 24 in G Major: II. Andante sostenuto
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Rieding: Violin concertino Op. 24 in G Major: III. Allegro
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Rieding: Violin concertino Op. 25 in D Major: I. Allegro moderato
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Rieding: Violin concertino Op. 25 in D Major: II. Adagio
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Rieding: Violin concertino Op. 25 in D Major: III. Allegro
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Rieding: Violin concerto Op. 35 in B Minor: I. Allegro moderato
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Rieding: Violin concerto Op. 35 in B Minor: II. Andante
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Rieding: Violin concerto Op. 35 in B Minor: III. Allegro moderato
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Sitt: Violin concertino Op. 70 in A Minor: I. Allegro
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Sitt: Violin concertino Op. 70 in A Minor: III. Allegretto
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Mozart: The Violin Concertos; Sinfonia Concertante
Violin Concerto No. 2 in D Major, K. 211: I. Allegro moderato
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Violin Concerto No. 4 in D Major, K. 218: I. Allegro
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Violin Concerto No. 2 in D Major, K. 211: II. Andante
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Violin Concerto No. 4 in D Major, K. 218: II. Andante cantabile
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Violin Concerto No. 2 in D Major, K. 211: III. Rondeau (Allegro)
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Violin Concerto No. 4 in D Major, K. 218: III. Rondeau (Andante grazioso - Allegro ma non troppo)
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Violin Concerto No. 1 in B-Flat Major, K. 207: I. Allegro moderato
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Violin Concerto No. 3 in G Major, K. 216: I. Allegro
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Violin Concerto No. 1 in B-Flat Major, K. 207: II. Adagio
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Violin Concerto No. 3 in G Major, K. 216: II. Adagio
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Violin Concerto No. 1 in B-Flat Major, K. 207: III. Presto
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Violin Concerto No. 3 in G Major, K. 216: III. Rondo (Allegro)
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Violin Concerto No. 5 in A Major, K. 219: I. Allegro aperto
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Sinfonia Concertante for Violin, Viola and Orchestra in E Flat Major, K. 364: I. Allegro maestoso
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Violin Concerto No. 5 in A Major, K. 219: II. Adagio
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Sinfonia Concertante for Violin, Viola and Orchestra in E Flat Major, K. 364: II. Andante
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Violin Concerto No. 5 in A Major, K. 219: III. Rondeau (Tempo di minuetto)
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Sinfonia Concertante for Violin, Viola and Orchestra in E Flat Major, K. 364: III. Presto
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Divertimento (Piano Trio) In B Flat, K.254: 1. Allegro assai - Live At Festspielhaus, Baden-Baden / 2005
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Wohin mit der Freud?, Op. 58, No. 2, "Ach du klarblauer Himmel"
Carl Maria von Weber Men's Choir, Berlin
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Die Lorelei: Ich weiss nicht, was soll es bedeuten
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Heidenroslein (Rose on the Heath) (arr. H. Sitt)
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Schone Ahnung ist erglommen, Op. 57, No. 2, J. 228, "Fruhlingslied"
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Ritornelle in canonischen Weisen, Op. 65: No. 1. Die Rose stand im Tau (The Rose stand in the Dew)
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Wenn ich einmal soll scheiden (arr. G. Schreck)
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6 Songs, Op. 48: No. 4. Die Ehre Gottes aus der Natur, "Die Himmel ruhmen des Ewigen Ehre" (arr. C. Reinecke)
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Piano Concerto in A Minor, Op. 16: I. Allegro molto moderato
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2 Elegiac Melodies, Op. 34: No. 2. Varen (Last Spring)
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Norwegian Dances, Op. 35: No. 2 in A Major (arr. for orchestra)
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Peer Gynt-Suite Nr. 1, Op. 46: I. Morning
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Peer Gynt-Suite Nr. 1, Op. 46: III. Anitra's Dance
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Peer Gynt Suite No. 2, Op. 55: II. Arabian Dance
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Peer Gynt Suite No. 2, Op. 55: IV. Solveig's Song
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Fra Holbergs tid (From Holberg's Time), Op. 40 (version for orchestra): IV. Air
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Lyric Pieces, Book 8, Op. 65: No. 6. Wedding Day at Troldhaugen (arr. for orchestra)
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2 Elegiac Melodies, Op. 34: No. 1. Hjertesar (The Wounded Heart)
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Eine kleine Nachtmusik, K. 525: I. Allegro
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Three Compositions, Op. 19: No. 3, Lullaby
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Clarinet Concerto in A Major, K. 622: 2. Adagio
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Die Walküre, WWV 86B, Act III: Ride of the Valkyries
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Swan Lake, Op. 20, TH. 12, Act II: No. 10 Scène
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Carmen Suite No. 1: 6. The Toreador Song
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Symphony No. 7 in A Major, Op. 92: II. Allegretto
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The Sleeping Beauty, Op. 66, TH. 13, Act I: 6. Waltz
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Albumblätter, Op. 39: II. Andante sostenuto
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Albumblätter, Op. 39: VI. Allegro, molto vivace
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Romance in E-Flat Major, Op. 4 (Arr. Zimmermann for Viola & Piano)
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3 Gymnopédies: 1. Lent et douloureux (Arr. for orchestra by Claude Debussy)
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Serenade in B-Flat Major, K. 361 "Gran partita": 3. Adagio
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Peer Gynt Suite No. 1, Op. 46: III. Anitras dans (Anitra's Dance)
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Peer Gynt Suite No. 1, Op. 46: IV. I Dovregubbens hall (In the Hall of the Mountain King)
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Lyric Pieces, Book I, Op. 12: I. Arietta
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Abdelazer, Z. 570: Rondeau - Arr. by Mary Cohen
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Concerto in G Major, TWV 51:G8: I. Allegro
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Violin Concerto No. 2: I. Allegro giocoso - Allegro - Moderato
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Violin Concerto No. 2: II. Andante - Doppio movimento - Tempo I
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Violin Concerto No. 2: III. Allegro molto - Presto
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Grieg: Orchestral Music, Vol. 2 - Orchestrated Piano Pieces
Grieg, E.: From Holberg's Time / Sibelius, J.: Karelia Suite / Finlandia / Valse Triste / Suite Champetre
Brahms / Reinecke / Herzogenberg / Kiel / Fuchs / Sitt: Viola Works