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description: Nikolai Demidenko (born 1 July 1955) is a Russian-born classical pianist. Biography Demidenko studied at the Gnessin State Musical College with Anna Kantor for 12 years,Cause and Effect. Nikolai De
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Polonaise in B-Flat Minor, KK IVa/5 - Excerpt
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Piano Concerto No. 3 in E Minor, Op. 60: II. Interludium. Allegro, molto sostenuto, misterioso
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track: 6 Variations on "Nel cor più non mi sento" from "La molinara" by Paisiello, WoO 70: Var. 2
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6 Variations on "Nel cor più non mi sento" from "La molinara" by Paisiello, WoO 70: Var. 6
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11 Bagatelles, Op. 119: No. 5 in C Minor. Risoluto
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48 Esquisses, Op. 63, Book 3: No. 26, Petit air
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The Tale of Tsar Saltan: The Flight of the Bumblebee (Transcr. Rachmaninoff for Piano)
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Piano Sonata No. 16 in C Major, K. 545 "Sonata facile": III. Rondo. Allegretto
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Marie-Poème, S. 701b
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Responsorien und Antiphonen, S. 30: V. In Officio defunctorum: z. Responsorium 9a Reprise. Libera me, Domine, de morte
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6 Waltzes, Op. 28: No. 3, Animato
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Prole do bebê 1, W140: VII. O Polichinelo
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12 Monferrinas, Op. 49: VIII. Vivace assai
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24 Preludes in All Major and Minor Keys, Op. 102: No. 20 in A Minor
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2 Poèmes, Op. 63: No. 1, Masque. Allegretto
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3 Morceaux, Op. 49: No. 3, Rêverie. Con finezza
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Freie Fantasie fürs Clavier in F-Sharp Minor, H. 300: VIII. Adagio
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Partita No. 2 in C Minor, BWV 826: V. Rondeau - Recorded 2018
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March in E-Flat Major, BWV Anh. 127
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Sonata in A Major, Op. 6 No. 11: III. Adagio
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Violin Sonata in D Minor, RV 14: III. Adagio
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2-Part Invention No. 1 in C Major, BWV 772
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Sonata in A Minor, Op. 6 No. 6: IV. Allegro
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Nouvelles suites de pièces de clavecin, Suite in A Minor, RCT 5: VIId. Double 3
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: Nouvelles suites de pièces de clavecin, Suite in A Minor, RCT 5: VIId. Double 3
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Flute Sonata in B Minor, HWV 376 "Halle No. 3": III. Largo
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by artist: Richard Tunnicliffe
by artist: Paul Nicholson
in album: Bourrée - Baroque Favourites
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genre: early-music
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genre: english-baroque
genre: german-baroque
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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
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Nouvelles suites de pièces de clavecin, Suite in A Minor, RCT 5: VIIb. Double 1
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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: 2026-07-08T03:22:41Z
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Violin Sonata No. 11 in E Major, Op. 5 No. 11: V. Gavotta. Allegro
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by artist: Convivium
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: Violin Sonata No. 11 in E Major, Op. 5 No. 11: V. Gavotta. Allegro
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Premier livre de pièces de clavecin, Suite in A Minor, RCT 1: IX. Menuet
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: Premier livre de pièces de clavecin, Suite in A Minor, RCT 1: IX. Menuet
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Sonata in B-Flat Major, Op. 6 No. 3: I. Grave
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: Sonata in B-Flat Major, Op. 6 No. 3: I. Grave
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Sonata in B-Flat Major, Op. 6 No. 3: IV. Presto
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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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Concerto for Strings in G Minor, RV 157: II. Largo
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Ottone in villa, RV 729: Sinfonia: b. Larghetto
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track: Scherzo in B Minor, MWV U69
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Piano Sonata No. 16 in C Major, K. 545 "Sonata facile": III. Rondo. Allegretto
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16 German Dances, D. 783: No. 3 in B-Flat Major
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Scherzo in B Minor, MWV U69
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Piano Piece in D Minor (c. 1884)
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY8719806
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:22:41Z
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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e83f200e5709a167f6b2c1662d1ba2e2450508e122b8a08b5698f8c141bfd7. 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/GBAJY8719806.
  date published: 2026-07-08T03:22:41Z
audio: Piano Piece in D Minor (c. 1884)
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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Children's Album, Op. 39: No. 4. Maman
type: MusicRecording
duration: PT0M49S
duration ms: 49400
explicit: false
by artist: Pyotr Ilyich Tchaikovsky
by artist: Lívia Rév
in album: Allegretto - Piano Works
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  date published: 2024-11-19
isrc code: GBAJY8618514
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957124
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY8618514
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:53:27Z
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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8beb0f2b75e3c80383172ecaf639309c146c4c667ea94a9e0feb5af4238a05. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAJY8618514.
  date published: 2026-07-08T03:53:27Z
audio: Children's Album, Op. 39: No. 4. Maman
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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Papillons, Op. 2: No. 9 in B-Flat Minor. Prestissimo
type: MusicRecording
duration: PT0M42S
duration ms: 42000
explicit: false
by artist: Robert Schumann
by artist: Marc-André Hamelin
in album: Allegretto - Piano Works
  type: MusicAlbum
  date published: 2024-11-19
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: GBAJY0512010
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957145
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY0512010
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T08:56:20Z
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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113bc5208c27da113edea5140e57ba5723a42a7b0a47b0839f7362869c6e919e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAJY0512010.
  date published: 2026-07-08T08:56:20Z
audio: Papillons, Op. 2: No. 9 in B-Flat Minor. Prestissimo
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
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  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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Bach - Baroque Evening
type: MusicAlbum
date published: 2024-12-05
track: Cello Suite No. 1 in G Major, BWV 1007: VI. Gigue
  type: MusicRecording
  duration: PT1M47S
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  explicit: false
  by artist: Johann Sebastian Bach
  by artist: Steven Isserlis
  in album: Bach - Baroque Evening
    type: MusicAlbum
    date published: 2024-12-05
  genre: classical
  genre: classical-piano
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  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
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  additional property: CopyrightRegisteredAt
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  additional property: CopyrightChainExplorerURL
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  additional property: OTSHash
  additional property: OTSBitcoinBlock
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  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY0754106
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T08:56:20Z
  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
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2be8466febacf5e3f33734cd229414989fa1dbbb2a50c95a6369f709653235b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAJY0754106.
    date published: 2026-07-08T08:56:20Z
  audio: Cello Suite No. 1 in G Major, BWV 1007: VI. Gigue
    type: AudioObject
    additional property: Tempo (BPM)
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    additional property: Musical Key
      type: PropertyValue
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    additional property: Mode (Major/Minor)
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    additional property: Time Signature
      type: PropertyValue
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    additional property: Danceability
      type: PropertyValue
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    additional property: Energy
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    additional property: Speechiness
      type: PropertyValue
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    additional property: Acousticness
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    additional property: Instrumentalness
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    additional property: Liveness
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    additional property: Valence (Positivity)
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    additional property: Loudness (dB)
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    additional property: Key Name
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    additional property: Mode Name
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track: The Well-Tempered Clavier, Book 1: Fugue No. 7 in E-Flat Major, BWV 852/2 - Recorded 1997
  type: MusicRecording
  duration: PT1M42S
  duration ms: 102426
  explicit: false
  by artist: Johann Sebastian Bach
  by artist: Angela Hewitt
  in album: Bach - Baroque Evening
    type: MusicAlbum
    date published: 2024-12-05
  genre: classical
  genre: classical-piano
  isrc code: GBAJY9730114
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-07T05:24:19+00:00
  additional property: CopyrightChainExplorerURL
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    value: https://explorer.copyrightchains.com/tx/0x18e4e951ba79b1a4f2d2f7425169cf03791477535d6c4da10c95feea5f0735a3
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  additional property: OTSBitcoinBlock
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  additional property: OTSBitcoinBlockVerifyURL
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9730114
  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
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e4e951ba79b1a4f2d2f7425169cf03791477535d6c4da10c95feea5f0735a3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBAJY9730114.
    date published: 2026-07-08T03:20:19Z
  audio: The Well-Tempered Clavier, Book 1: Fugue No. 7 in E-Flat Major, BWV 852/2 - Recorded 1997
    type: AudioObject
    additional property: Tempo (BPM)
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    additional property: Musical Key
      type: PropertyValue
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    additional property: Mode (Major/Minor)
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    additional property: Time Signature
      type: PropertyValue
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    additional property: Danceability
      type: PropertyValue
      value: 0.443
    additional property: Energy
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    additional property: Speechiness
      type: PropertyValue
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    additional property: Acousticness
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    additional property: Instrumentalness
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    additional property: Liveness
      type: PropertyValue
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    additional property: Valence (Positivity)
      type: PropertyValue
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    additional property: Loudness (dB)
      type: PropertyValue
      value: -28.866
    additional property: Key Name
      type: PropertyValue
      value: Eb
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: The Well-Tempered Clavier, Book 1: Prelude No. 5 in D Major, BWV 850/1
  type: MusicRecording
  duration: PT1M47S
  duration ms: 107000
  explicit: false
  by artist: Johann Sebastian Bach
  by artist: Colin Tilney
  in album: Bach - Baroque Evening
    type: MusicAlbum
    date published: 2024-12-05
  genre: classical
  genre: classical-piano
  isrc code: GBAJY9035109
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
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  additional property: CopyrightRegisteredAt
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  additional property: CopyrightChainExplorerURL
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  additional property: OTSHash
  additional property: OTSBitcoinBlock
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
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  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: The Well-Tempered Clavier, Book 1: Prelude No. 5 in D Major, BWV 850/1
track: The Well-Tempered Clavier, Book 1: Fugue No. 9 in E Major, BWV 854/2 - Recorded 2008
track: Suite in G Minor, BWV 822: IV. Bourrée
track: Sonata in D Major, BWV 963: II. [Grave]
track: Violin Sonata in G Major, BWV 1021: III. Largo
track: 2-Part Invention No. 11 in G Minor, BWV 782

OTSHash
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OTSBitcoinBlock
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value: 957120

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/957120

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9035109

OTSTimestamp
type: PropertyValue
value: 2026-07-08T03:22:41Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481ed56337db46cda417d6a1adab2331ea7affa5e1641a58890fc065d512609e. 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/GBAJY9035109.
date published: 2026-07-08T03:22:41Z

The Well-Tempered Clavier, Book 1: Prelude No. 5 in D Major, BWV 850/1
type: AudioObject
additional property: Tempo (BPM)
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additional property: Musical Key
  type: PropertyValue
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additional property: Mode (Major/Minor)
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additional property: Time Signature
  type: PropertyValue
  value: 5
additional property: Danceability
  type: PropertyValue
  value: 0.24
additional property: Energy
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  value: 0.596
additional property: Speechiness
  type: PropertyValue
  value: 0.034
additional property: Acousticness
  type: PropertyValue
  value: 0.685
additional property: Instrumentalness
  type: PropertyValue
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additional property: Liveness
  type: PropertyValue
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additional property: Valence (Positivity)
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additional property: Loudness (dB)
  type: PropertyValue
  value: -26.029
additional property: Key Name
  type: PropertyValue
  value: F
additional property: Mode Name
  type: PropertyValue
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The Well-Tempered Clavier, Book 1: Fugue No. 9 in E Major, BWV 854/2 - Recorded 2008
type: MusicRecording
duration: PT1M6S
duration ms: 66920
explicit: false
by artist: Johann Sebastian Bach
by artist: Angela Hewitt
in album: Bach - Baroque Evening
  type: MusicAlbum
  date published: 2024-12-05
genre: classical
genre: classical-piano
isrc code: GBAJY0974118
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9eccfa816513108df02da84bf8e48fc48380a2982bbe6d341ceb1395582011. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAJY0974118.
  date published: 2026-07-08T03:53:27Z
audio: The Well-Tempered Clavier, Book 1: Fugue No. 9 in E Major, BWV 854/2 - Recorded 2008
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  additional property: Tempo (BPM)
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  additional property: Musical Key
    type: PropertyValue
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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Suite in G Minor, BWV 822: IV. Bourrée
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by artist: Johann Sebastian Bach
by artist: Mahan Esfahani
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genre: classical
genre: classical-piano
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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: 2026-07-08T03:22:41Z
audio: Suite in G Minor, BWV 822: IV. Bourrée
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Sonata in D Major, BWV 963: II. [Grave]
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by artist: Johann Sebastian Bach
by artist: Angela Hewitt
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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: 2026-07-08T08:56:20Z
audio: Sonata in D Major, BWV 963: II. [Grave]
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Violin Sonata in G Major, BWV 1021: III. Largo
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by artist: Johann Sebastian Bach
by artist: Paul Nicholson
by artist: Richard Tunnicliffe
by artist: Elizabeth Wallfisch
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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: 2026-07-08T03:22:41Z
audio: Violin Sonata in G Major, BWV 1021: III. Largo
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2-Part Invention No. 11 in G Minor, BWV 782
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T08:56:20Z
audio: 2-Part Invention No. 11 in G Minor, BWV 782
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'January': A Calendar of Classics: Chopin
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track: 12 Etudes, Op. 10: No. 2 In A Minor - "Chromatique"
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T03:22:41Z
  audio: 12 Etudes, Op. 10: No. 2 In A Minor - "Chromatique"
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track: 12 Études, Op. 10: No. 11 in E-Flat Major
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T08:56:20Z
  audio: 12 Études, Op. 10: No. 11 in E-Flat Major
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track: 12 Etudes, Op. 10: No. 4 in C Sharp Minor
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OTSVerificationAPI
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OTSTimestamp
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OTSVerifyInstructions
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OpenTimestamps Proof of Existence
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date published: 2026-07-08T08:56:20Z

12 Etudes, Op. 10: No. 4 in C Sharp Minor
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Herr Jesu Christ, wahr' Mensch und Gott, BWV 127: III. Aria. Die Seele ruht in Jesu Händen (Arr. Rummel for Piano) - Excerpt
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Partita No. 4 in D Major, BWV 828: Gigue - Excerpt
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Dich hab ich je und je geliebet, BWV 49 (Arr. Rummel for Piano) - Excerpt
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subject of: OpenTimestamps Proof of Existence
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The Well-Tempered Clavier: Prelude No. 22 in B-Flat Minor, BWV 867/1 - Excerpt
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Partita No. 3 in A Minor, BWV 827: Sarabande - Excerpt
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Prelude No. 24 in B Minor, BWV 869/1 - Excerpt
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Air on the G String (Arr. Siloti for Piano) - Excerpt
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Liebster Gott, wenn werd ich sterben?, BWV 8 (Arr. Saint-Saëns for Piano) - Excerpt
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Prelude & Fugue in D Major, BWV 532 (Arr. Busoni for Piano): Prelude - Excerpt
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Jesu, der du meine Seele, BWV 78: Wir eilen mit schwachen (Arr. Rummel for Piano) - Excerpt
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Magnificat in D Major, BWV 243: Esurientes implevit bonis (Arr. Rummel for Piano) - Excerpt
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  date published: 2026-07-06T06:56:49Z
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Ach bleib' bei uns, Herr Jesu Christ, BWV 649 (Arr. Vaughan Williams) - Excerpt
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Violin Sonata No. 5 in F Minor, BWV 1018: Adagio (Arr. Siloti for Piano) - Excerpt
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Piano Sonata No. 1 in C Major, K. 279: I. Allegro - Excerpt
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Piano Sonata No. 8 in A Minor, K. 310: II. Andante cantabile con espressione - Excerpt
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Piano Sonata No. 5 in G Major, K. 283: I. Allegro - Excerpt
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Piano Sonata No. 13 in B-Flat Major, K. 333: III. Allegretto grazioso - Excerpt
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Piano Sonata No. 4 in E-Flat Major, K. 282: Menuetto I-II - Excerpt
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Piano Concerto No. 27 in B-Flat Major, K. 595: II. Larghetto - Excerpt
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Piano Sonata No. 13 in B-Flat Major, K. 333: I. Allegro - Excerpt
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Piano Sonata No. 10 in C Major, K. 330: Andante cantabile - Excerpt
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Piano Sonata No. 12 in F Major, K. 332: II. Adagio - Excerpt
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Piano Sonata No. 8 in C Minor, Op. 13 "Pathétique": II. Adagio cantabile - Excerpt
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Helios Highlights: J.S. Bach
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track: 11 Bagatelles, Op. 119: 5. Risoluto
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track: Fantasia and Fugue in C Minor, BWV 537 (Arr. Albert for Piano): Prelude - Excerpt
track: Polonaise in B-Flat Minor, KK IVa/5 - Excerpt
track: Brandenburg Concerto No. 3 in G Major, BWV 1048: Allegro (Arr. Friedman for Piano) - Edit

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11 Bagatelles, Op. 119: 5. Risoluto
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Allemande in A Major, WoO 81
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Mazurka No. 28 in B Major, Op. 41 No. 3. Animato
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11 Bagatelles, Op. 119: 5. Risoluto
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24 Préludes, Op. 28, C. 166-189: 18 in F Minor
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Wiosna, Op. 74 No. 2 (Version for Solo Piano)
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Three Ecossaises Op. Post 72, No. 3 - 1, 2 + 3: No. 1 In D Major
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Sinfonia (3-Part Invention) No. 3 in D Major, BWV 789
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Goldberg Variations, BWV 988: Var. 4
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Piano Sonata No. 26 in E-Flat Major, Op. 81a "Les Adieux": I. Das Lebewohl. Adagio - Allegro
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24 Préludes, Op. 28: 12. In G Sharp Minor
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Piano Sonata No. 8 in C Minor, Op. 13 "Pathétique": II. Adagio cantabile - Excerpt
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Piano Sonata No. 32 in C Minor, Op. 111: II. Arietta - Excerpt
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Piano Sonata No. 32 in C Minor, Op. 111: Maestoso – Allegro con brio ed appassionato - Excerpt
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The Well-Tempered Clavier: Prelude No. 22 in B-Flat Minor, BWV 867/1 - Excerpt
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Partita No. 2 in C Minor, BWV 826: Allemande - Excerpt
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Mazurka No. 32 in C-Sharp Minor, Op. 50 No. 3 - Excerpt
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6 Bagatelles, Op. 126: No. 4 in B Minor - Excerpt
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Piano Sonata No. 27 in E Minor, Op. 90: Nicht zu geschwind und sehr singbar vorgetragen - Excerpt
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Nocturne No. 15 in F Minor, Op. 55 No. 1 - Excerpt
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Mazurka in C-Sharp Minor, Op. 41 No. 4 - Excerpt
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audio: Mazurka in C-Sharp Minor, Op. 41 No. 4 - Excerpt
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Polonaise in G-Flat Major, KK IVa/8 - Excerpt
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Jesu, der du meine Seele, BWV 78: Wir eilen mit schwachen (Arr. Rummel for Piano) - Excerpt
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Air on the G String (Arr. Siloti for Piano) - Excerpt
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6 Bagatelles, Op. 126: No. 6 in E-Flat Major - Excerpt
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The Well-Tempered Clavier: Prelude No. 8 in E-Flat Minor, BWV 853/1 - Excerpt
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12 Etudes, Op. 25: No. 10 in B Minor "Octave" - Excerpt
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Bagatelle No. 6 in D Major, Op. 33 - Excerpt
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audio: Bagatelle No. 6 in D Major, Op. 33 - Excerpt
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Magnificat in D Major, BWV 243: Esurientes implevit bonis (Arr. Rummel for Piano) - Excerpt
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Pathétique Sonata, Op. 13: Rondo. Allegro - Excerpt
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Allegretto in C Minor, WoO 53 - Excerpt
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Liebster Gott, wenn werd ich sterben?, BWV 8 (Arr. Saint-Saëns for Piano) - Excerpt
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Nocturne No. 14 in F-Sharp Minor, Op. 48 No. 2 - Excerpt
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Prelude No. 24 in B Minor, BWV 869/1 - Excerpt
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Ach bleib' bei uns, Herr Jesu Christ, BWV 649 (Arr. Vaughan Williams) - Excerpt
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audio: Ach bleib' bei uns, Herr Jesu Christ, BWV 649 (Arr. Vaughan Williams) - Excerpt
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Fantaisie in F Minor, Op. 49 - Excerpt
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24 Preludes, Op. 28: No. 15 in D-Flat Major "Raindrop Prelude" - Edit
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Partita No. 4 in D Major, BWV 828: Gigue - Excerpt
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Nocturne No. 4 in F Major, Op. 15 No. 1 - Excerpt
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Presto (Bagatelle) in C Minor, WoO 52 - Excerpt
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Variations on "Là ci darem la mano", Op. 2 - Excerpt
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Mazurka No. 33 in B Major, Op. 56 No. 1 - Excerpt
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audio: Ballade No. 3 in A-Flat Major, Op. 47 - Excerpt
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Mazurka No. 32 in C-Sharp Minor, Op. 50 No. 3 - Excerpt
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Piano Sonata No. 3 in B Minor, Op. 58: III. Largo - Excerpt
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Waltz No. 7 in C-Sharp Minor, Op. 64 No. 2 - Excerpt
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Nocturne No. 15 in F Minor, Op. 55 No. 1 - Excerpt
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12 Etudes, Op. 25: No. 10 in B Minor "Octave" - Excerpt
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Piano Sonata No. 2 in B-Flat Minor, Op. 35 "Funeral March": Marche funèbre - Excerpt
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Nocturne No. 4 in F Major, Op. 15 No. 1 - Excerpt
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Piano Concerto No. 1 in E Minor, Op. 11 (Arr. Balakirev): II. Romance. Larghetto - Excerpt
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24 Preludes, Op. 28: No. 15 in D-Flat Major "Raindrop Prelude" - Edit
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Nocturne No. 14 in F-Sharp Minor, Op. 48 No. 2 - Excerpt
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Fantaisie in F Minor, Op. 49 - Excerpt
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Variations on "Là ci darem la mano", Op. 2 - Excerpt
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Barcarolle in F-Sharp Major - Excerpt
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Impromptu No. 3 in G-Flat Major, Op. 51 - Excerpt
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audio: Impromptu No. 3 in G-Flat Major, Op. 51 - Excerpt
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Die schöne Müllerin, D. 795: Morgengrüss (Arr. Godowsky) - Excerpt
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Piano Sonata No. 21 in B-Flat Major, D. 960: Scherzo - Excerpt
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Piano Sonata No. 21 in B-Flat Major, D. 960: Andante sostenuto - Excerpt
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3 Klavierstücke, D. 946: No. 1 in E-Flat Minor - Excerpt
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