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    subject of: OpenTimestamps Proof of Existence
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-08T03:20:19Z
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  track: Piano Concerto No. 2 in BB Major, Op. 83: Ii. Allegro appassionato
  track: Piano Concerto No. 1 in D Minor, Op. 15: Iii. Rondo (Allegro non troppo)
  track: Piano Concerto No. 2 in BB Major, Op. 83: Iii. Andante
  track: Polonaise No. 6, In AB Major , Op. 53
  track: Piano Concerto No. 2 in BB Major, Op. 83: Iv. Allegretto grazioso
  track: Andante Spianato & Grand Polonaise Brillante Op. 22
  track: Piano Concerto No. 23 in A Major, K. 488: I. Allegro
  track: Mazurka in C Minor, Op. 56 No. 3
  track: Piano Concerto No. 23 in A Major, K. 488: Ii. Adagio
  track: Piano Concerto No. 23 in A Major, K. 488: Iii. Allegro assai
album: Strauss: Vier letzte Lieder - Four Last Songs [Daphne - Closing Scene - 12 Lieder]
album: Farewells - Czyż: Pożegnania: No. 2, Na wzgórzach Gruzji
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Piano Concerto No. 2 in BB Major, Op. 83: Ii. Allegro appassionato
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T19:53:57Z
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Piano Concerto No. 1 in D Minor, Op. 15: Iii. Rondo (Allegro non troppo)
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subject of: OpenTimestamps Proof of Existence
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by artist: Kölner Rundfunk-Sinfonie-Orchester
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T02:51:48Z
audio: Piano Concerto No. 2 in BB Major, Op. 83: Iii. Andante
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Polonaise No. 6, In AB Major , Op. 53
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by artist: Arthur Rubinstein
in album: Arthur Rubinstein Live, Vol. 1
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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: Polonaise No. 6, In AB Major , Op. 53
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Piano Concerto No. 2 in BB Major, Op. 83: Iv. Allegretto grazioso
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duration: PT9M10S
duration ms: 550306
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by artist: Johannes Brahms
by artist: Arthur Rubinstein
by artist: Christoph von Dohnányi
by artist: Kölner Rundfunk-Sinfonie-Orchester
in album: Arthur Rubinstein Live, Vol. 1
  type: MusicAlbum
  date published: 2023-03-03
genre: classical
genre: german-romanticism
genre: classical-piano
genre: late-romantic-era
genre: chamber-music
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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
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Andante Spianato & Grand Polonaise Brillante Op. 22
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duration: PT14M4S
duration ms: 844880
explicit: false
by artist: Frédéric Chopin
by artist: Arthur Rubinstein
in album: Arthur Rubinstein Live, Vol. 1
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  date published: 2023-03-03
genre: classical
genre: early-romantic-era
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T15:42:38Z
audio: Andante Spianato & Grand Polonaise Brillante Op. 22
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Piano Concerto No. 23 in A Major, K. 488: I. Allegro
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duration ms: 651600
explicit: false
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by artist: Arthur Rubinstein
by artist: Paul Paray
by artist: Detroit Symphony
in album: Arthur Rubinstein Live, Vol. 1
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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: Piano Concerto No. 23 in A Major, K. 488: I. Allegro
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Mazurka in C Minor, Op. 56 No. 3
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duration: PT5M26S
duration ms: 326320
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by artist: Arthur Rubinstein
in album: Arthur Rubinstein Live, Vol. 1
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genre: classical
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T12:24:41Z
audio: Mazurka in C Minor, Op. 56 No. 3
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Piano Concerto No. 23 in A Major, K. 488: Ii. Adagio
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duration ms: 400613
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by artist: Arthur Rubinstein
by artist: Paul Paray
by artist: Detroit Symphony
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T17:29:52Z
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Schumann: Die Großen Chorwerke / The Great Choral Works
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    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.511
  additional property: Energy
    type: PropertyValue
    value: 0.289
  additional property: Speechiness
    type: PropertyValue
    value: 0.045
  additional property: Acousticness
    type: PropertyValue
    value: 0.87
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.039
  additional property: Liveness
    type: PropertyValue
    value: 0.125
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.241
  additional property: Loudness (dB)
    type: PropertyValue
    value: -16.346
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Major