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  date published: 2019-08-30
  track: 4 Bagatelles, Op. 28: I. Aus der Zopfzeit
album: Chausson: Concert for Violin, Piano and String Quartet in D Major, Op. 21 & String Quartet in C Minor, Op. 35
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album: Famous Violin Sonatas
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      date published: 2026-07-08T03:20:19Z
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  track: Violin Sonata No. 5 in F, Op. 24 'Spring': IV. Rondo: Allegro ma non Troppo
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  track: Violin Sonata No. 1 in A Minor, Op. 105: III. Lebhaft
  track: Sonata No. 2 in A Major, Op. 100: II. Andante tranquillo - Vivace - Andante - Vivace di più - Andante - Vivace
  track: Violin Sonata No. 2 in E-Flat Major, Op. 102: IV. Allegro grazioso, non presto
  track: Violin Sonata No. 10 in G, Op. 96: II. Adagio Espressivo
  track: Violin Sonata, L.140: I. Allegro vivo
  track: Violin Sonata No. 2 in G Major, M.77: III. Perpetuum mobile, allegro
  track: Sonata No. 3 in D Minor, Op. 108: IV. Presto Agitato
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album: Italian Violin Sonatas
album: Brahms: Quintet for Piano, 2 Violins, Viola and Cello in F Minor, Op. 34
album: Barison: Works for violin and piano
album: Concertos & Symphonies of the 18th Century
album: Virtuoso Violin
album: Paganini: String Quartet in A Minor, MS 20 No. 3 & 3 Duetti concertante, MS 130

4 Bagatelles, Op. 28: I. Aus der Zopfzeit
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  date published: 2026-07-08T03:22:41Z
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Duo Concertans, Op. 9 No. 1: I. Andante
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Duo Concertans, Op. 9 No. 1: II. Allegro vivace e con Brio
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Duo Concertans, Op. 9 No. 1: III. Andante
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 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

Duo, Op. 29 No. 1: I. Allegro Vivace
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by artist: Giovanni Battista Viotti
by artist: Fabrizio Falasca
by artist: Gianmaria Melis
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genre: classical
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T18:48:12Z
audio: Duo, Op. 29 No. 1: I. Allegro Vivace
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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Libesleid
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duration: PT3M51S
duration ms: 231879
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by artist: Fritz Kreisler
by artist: Fabrizio Falasca
by artist: Stefania Redaelli
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genre: classical
genre: post-romantic-era
genre: violin
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 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
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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  date published: 2026-07-08T03:20:19Z
audio: Libesleid
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Energy
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Acousticness
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Instrumentalness
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Liveness
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Valence (Positivity)
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Loudness (dB)
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Key Name
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Violin Sonata No. 1 in A Minor, Op. 105: III. Lebhaft
type: MusicRecording
duration: PT5M35S
duration ms: 335253
explicit: false
by artist: Robert Schumann
by artist: Andrea Cortesi
by artist: Marco Venturi
in album: Famous Violin Sonatas
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  date published: 2020-09-04
popularity: 6
genre: classical
genre: classical-piano
genre: chamber-music
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Violin Sonata No. 1 in A Minor, Op. 105: III. Lebhaft
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Sonata No. 2 in A Major, Op. 100: II. Andante tranquillo - Vivace - Andante - Vivace di più - Andante - Vivace
type: MusicRecording
duration: PT6M21S
duration ms: 381280
explicit: false
by artist: Johannes Brahms
by artist: Kristóf Baráti
by artist: Klára Würtz
in album: Famous Violin Sonatas
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popularity: 6
genre: classical
genre: german-romanticism
genre: late-romantic-era
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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  value: 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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-07T16:07:00Z
audio: Sonata No. 2 in A Major, Op. 100: II. Andante tranquillo - Vivace - Andante - Vivace di più - Andante - Vivace
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Violin Sonata No. 2 in E-Flat Major, Op. 102: IV. Allegro grazioso, non presto
type: MusicRecording
duration: PT4M38S
duration ms: 278200
explicit: false
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by artist: Mauro Tortorelli
by artist: Angela Meluso
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  date published: 2020-09-04
popularity: 6
genre: classical
genre: late-romantic-era
genre: french-romanticism
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additional property: CopyrightRegisteredAt
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
  type: PropertyValue
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: Violin Sonata No. 2 in E-Flat Major, Op. 102: IV. Allegro grazioso, non presto
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Violin Sonata No. 10 in G, Op. 96: II. Adagio Espressivo
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duration: PT5M16S
duration ms: 316920
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by artist: Kristóf Baráti
by artist: Klára Würtz
in album: Famous Violin Sonatas
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popularity: 6
genre: classical
genre: classical-piano
genre: chamber-music
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additional property: OTSVerificationAPI
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additional property: OTSVerifyInstructions
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  value: 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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: Violin Sonata No. 10 in G, Op. 96: II. Adagio Espressivo
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Violin Sonata, L.140: I. Allegro vivo
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duration: PT4M33S
duration ms: 273306
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by artist: Claude Debussy
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Sonata No. 3 in D Minor, Op. 108: IV. Presto Agitato
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Beethoven: Violin Sonata No. 9 "Kreutzer " & Franck: Sonata in A Major
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Viotti: Duos for 2 Violins
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track: Duo, Op. 29 No. 1: I. Allegro Vivace

Italian Violin Sonatas
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Brahms: Quintet for Piano, 2 Violins, Viola and Cello in F Minor, Op. 34
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Barison: Works for violin and piano
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Concertos & Symphonies of the 18th Century
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Virtuoso Violin
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Paganini: String Quartet in A Minor, MS 20 No. 3 & 3 Duetti concertante, MS 130
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