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description: thumb|Alexandre Kniazev and Plamena Mangova, during la Folle Journée, 2009. Alexandre Alexandrovitch Kniazev () (born 26 April 1961 in Moscow) is a Russian cellist and organist. He was named best mus
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album: 150 Years Rachmaninoff
album: Igor Raykhelson: Piano & Chamber Music, Vol. 1
album: Tchaikovsky, Rachmaninoff: Piano Trio in A Minor, Trio Élégiaque
album: Nikolai Lugansky Plays Chopin
album: Bach: Work of Art
album: Tchaikovsky: Swan Lake and Other Masterpieces
album: Cello Concertos
album: Russian Classics
album: Sad Violin
album: Sonatas, Op. 120, Four Serious Songs, Op. 121
album: Igor Raykhelson: Piano & Chamber Music, Vol. 2
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album: J.S.Bach: Goldberg Variations BWV 988
album: Brahms: Cello Sonatas
album: The Pipe Organ of the Riga Cathedral
album: Raykhelson: Orchestral Music, Vol. 3
album: Franck & Ysaÿe: Works for Cello and Piano
album: J.S.Bach: Six Suites for Violoncello solo, Chaconne (arr. Kniazev)
album: Mozart & Brahms: Trios for Clarinet, Cello and Piano
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album: ショスタコーヴィチ：チェロ・ソナタ 作品 40、ヴィオラ・ソナタ 作品147
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album: Rachmaninoff: Complete Chamber Music
album: Life of Tchaikovsky
album: Tchaikovsky : Rococo Variations, Andante Cantabile, Romances
album: The Classical Guide to Rachmaninov
album: Verbier Festival - 25 Years of Excellence
album: Rendez-vous With Martha Argerich, Vol. 3
album: Rachmaninov: Piano Concerto No. 4 - Chopin, Beethoven

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Tchaikovsky / Arr. Stetsuk for Cello and Orchestra: 16 Children's Songs, Op. 54: No. 10, Lullaby in a Storm
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Boccherini: Cello Concerto No. 9 in B-Flat Major, G. 482: III. Rondo. Allegro (Cadenza by Grützmacher)
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Vivaldi: Concerto for Two Cellos in G Minor, RV 531: II. Largo
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Chopin: Cello Sonata in G Minor, Op. 65: III. Largo
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Haydn, Michael / Arr Stoll : Polonaise in C major
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Haydn: Cello Concerto No. 2 in D Major, Hob. VIIb:2: III. Rondo. Allegro
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Duport : Duo for 2 cellos in G major, Op.1/3 : Adagio-Presto
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Vivaldi: Cello Sonata No. 4 in B-Flat Major, Op. 14, RV 45: I. Largo
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Fauré: Cello Sonata No. 1 in D Minor, Op. 109: II. Andante
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Fauré: Élégie, Op. 24
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Tchaikovsky / Arr. Stetsuk for Cello and Orchestra: 6 Romances, Op. 73: No. 6, Again, as Before, Alone
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Duport : Cello Concerto No.1 in G major : Romance
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Debussy: Cello Sonata in D Minor, CD 144, L. 135: III. Final. Animé, léger et nerveux
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Tchaikovsky: String Quartet No. 1 in D Major, Op. 11: II. Andante cantabile
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Bach, JS: Cello Suite No. 3 in C Major, BWV 1009: VI. Gigue
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Vivaldi: Chamber Concerto in D Major, RV 92: III. Allegro
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Spohr : Sonata for Cello & Harp in G major Op.115 : III Rondo
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Bach, JS: Cello Suite No. 4 in E-Flat Major, BWV 1010: II. Allemande
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Vivaldi: Cello Concerto in G Minor, RV 416: III. Allegro
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Tchaikovsky / Arr. Stetsuk for Cello and Orchestra: 6 Romances, Op. 57: No. 3, Do Not Ask
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Vivaldi: Cello Concerto in B-Flat Major, RV 423: I. Allegro
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Boccherini: Cello Sonata No. 7 in B-Flat Major, G8: III. Larghetto - Allegro - Larghetto
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Sammartini : Sonata No.3 for 2 Cellos in A minor : III Minuet - Allegro
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Kraft : Sonata No.1 in B flat major : II Adagio
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Boccherini: Cello Concerto No. 8 in C Major, G. 481: III. Allegretto
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Lalo: Cello Concerto in D Minor: II. Intermezzo - Allegro presto
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Chopin: Cello Sonata in G Minor, Op. 65: II. Allegro con brio
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Bach, JS: Cello Suite No. 1 in G Major, BWV 1007: I. Prelude
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Rachmaninov: Cello Sonata in G Minor, Op. 19: III. Andante
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Tchaikovsky / Arr. Stetsuk for Cello and Orchestra: 6 Romances, Op. 16: No. 5, Thy Radiant Image
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Tchaikovsky / Arr. Stetsuk for Cello and Orchestra: 6 Romances, Op. 6: No. 5, Why?
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Vivaldi: Cello Sonata No. 1 in B-Flat Major, Op. 14, RV 47: IV. Allegro
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Dvořák: Cello Concerto in B Minor, Op. 104, B. 191: II. Adagio ma non troppo
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Spohr : Sonata for Cello & Harp in G major Op.115 : II Larghetto
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Bach, JS: Cello Suite No. 5 in C Minor, BWV 1011: V. Gavottes I & II
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Boccherini / Arr Stoll : Sonata No.3 in G major : III Minuetto
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Saint-Saëns: Cello Concerto No. 1 in A Minor, Op. 33: I. Allegro non troppo
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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/FRZ200200011
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 0x226640c16297099da100871af358759577303d4966b19abdaa7034744a9d106f. 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/FRZ200200011.
  date published: 2026-07-08T03:53:27Z
audio: Chopin: 24 Preludes, Op. 28: No. 7 in A Major
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  additional property: Mode (Major/Minor)
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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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Chopin: 24 Preludes, Op. 28: No. 8 in F-Sharp Minor
type: MusicRecording
duration: PT1M50S
duration ms: 110466
explicit: false
by artist: Frédéric Chopin
by artist: Nikolai Lugansky
in album: Nikolai Lugansky Plays Chopin
  type: MusicAlbum
  date published: 2022-05-27
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: FRZ200200012
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/FRZ200200012
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 0x257747eeefa4da8cfc21fa187de89afbb65e43bd78952f33b1dedc4eedb414e8. 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/FRZ200200012.
  date published: 2026-07-08T03:53:27Z
audio: Chopin: 24 Preludes, Op. 28: No. 8 in F-Sharp Minor
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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
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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: Valence (Positivity)
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Chopin: 24 Preludes, Op. 28: No. 9 in E Major
type: MusicRecording
duration: PT1M47S
duration ms: 107680
explicit: false
by artist: Frédéric Chopin
by artist: Nikolai Lugansky
in album: Nikolai Lugansky Plays Chopin
  type: MusicAlbum
  date published: 2022-05-27
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: FRZ200200013
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/957145
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ200200013
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 0x4ccc3a61e29c2e10a2dd20508b33d08b0c5f54babe6c2b09a8cee3060f21263f. 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/FRZ200200013.
  date published: 2026-07-08T08:56:20Z
audio: Chopin: 24 Preludes, Op. 28: No. 9 in E Major
  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: 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: Valence (Positivity)
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  additional property: Loudness (dB)
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Chopin: 24 Preludes, Op. 28: No. 11 in B Major
type: MusicRecording
duration: PT0M43S
duration ms: 43786
explicit: false
by artist: Frédéric Chopin
by artist: Nikolai Lugansky
in album: Nikolai Lugansky Plays Chopin
  type: MusicAlbum
  date published: 2022-05-27
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: FRZ200200015
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
  type: PropertyValue
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additional property: CopyrightChainExplorerURL
  type: PropertyValue
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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/957120
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ200200015
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 0xe860f380d780f8633972d3a034bb3281e7800145167122564e84cc38847fbff8. 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/FRZ200200015.
  date published: 2026-07-08T03:22:41Z
audio: Chopin: 24 Preludes, Op. 28: No. 11 in B Major
  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
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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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  additional property: Key Name
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  additional property: Mode Name
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Chopin: 24 Preludes, Op. 28: No. 12 in G-Sharp Minor
type: MusicRecording
duration: PT1M11S
duration ms: 71746
explicit: false
by artist: Frédéric Chopin
by artist: Nikolai Lugansky
in album: Nikolai Lugansky Plays Chopin
  type: MusicAlbum
  date published: 2022-05-27
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: FRZ200200016
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
  type: PropertyValue
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additional property: CopyrightChainExplorerURL
  type: PropertyValue
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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/FRZ200200016
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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1f94ccb29feb0e247282415188305b09a1c5de13c333a4130493be953c3585. 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/FRZ200200016.
  date published: 2026-07-08T08:56:20Z
audio: Chopin: 24 Preludes, Op. 28: No. 12 in G-Sharp Minor
  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
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  additional property: Danceability
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  additional property: Acousticness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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Chopin: 24 Preludes, Op. 28: No. 13 in F-Sharp Major
type: MusicRecording
duration: PT3M33S
duration ms: 213013
explicit: false
by artist: Frédéric Chopin
by artist: Nikolai Lugansky
in album: Nikolai Lugansky Plays Chopin
  type: MusicAlbum
  date published: 2022-05-27
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: FRZ200200017
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
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additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x265b0743e08a611a9c7c2e2acd5451d691916d6a6392aed9170a723363e11a52
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/FRZ200200017
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 0x265b0743e08a611a9c7c2e2acd5451d691916d6a6392aed9170a723363e11a52. 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/FRZ200200017.
  date published: 2026-07-08T03:20:19Z
audio: Chopin: 24 Preludes, Op. 28: No. 13 in F-Sharp Major
  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
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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: Valence (Positivity)
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  additional property: Loudness (dB)
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Chopin: 24 Preludes, Op. 28: No. 14 in E-Flat Minor
type: MusicRecording
duration: PT0M31S
duration ms: 31773
explicit: false
by artist: Frédéric Chopin
by artist: Nikolai Lugansky
in album: Nikolai Lugansky Plays Chopin
  type: MusicAlbum
  date published: 2022-05-27
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: FRZ200200018
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
  type: PropertyValue
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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
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b09459e47fc91be6d82e31376459282a9a2a5cafe4c286092d47c824e66b68e. 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/FRZ200200018.
  date published: 2026-07-08T03:20:19Z
audio: Chopin: 24 Preludes, Op. 28: No. 14 in E-Flat Minor
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  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: Danceability
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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Chopin: 24 Preludes, Op. 28: No. 15 in D-Flat Major "Raindrop"
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duration: PT5M52S
duration ms: 352520
explicit: false
by artist: Frédéric Chopin
by artist: Nikolai Lugansky
in album: Nikolai Lugansky Plays Chopin
  type: MusicAlbum
  date published: 2022-05-27
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: FRZ200200019
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-04T09:14:30+00:00
additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957124
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1c98f14e0eebcaf7528f7608f6f506501b7f0490077a522d829af980ec9e47. 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/FRZ200200019.
  date published: 2026-07-08T03:53:27Z
audio: Chopin: 24 Preludes, Op. 28: No. 15 in D-Flat Major "Raindrop"
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  additional property: Acousticness
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  additional property: Valence (Positivity)
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Chopin: 24 Preludes, Op. 28: No. 16 in B-Flat Minor
type: MusicRecording
duration: PT1M2S
duration ms: 62306
explicit: false
by artist: Frédéric Chopin
by artist: Nikolai Lugansky
in album: Nikolai Lugansky Plays Chopin
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genre: classical
genre: early-romantic-era
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additional property: OTSHash
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/FRZ200200020
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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e5e07a4588f703e08a79ae46720e27ce6147db2786da7d6668167174e37832. 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/FRZ200200020.
  date published: 2026-07-08T08:56:20Z
audio: Chopin: 24 Preludes, Op. 28: No. 16 in B-Flat Minor
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  additional property: Mode (Major/Minor)
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  additional property: Valence (Positivity)
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Chopin: 24 Preludes, Op. 28: No. 17 in A-Flat Major
type: MusicRecording
duration: PT2M54S
duration ms: 174653
explicit: false
by artist: Frédéric Chopin
by artist: Nikolai Lugansky
in album: Nikolai Lugansky Plays Chopin
  type: MusicAlbum
  date published: 2022-05-27
genre: classical
genre: early-romantic-era
genre: polish-classical
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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
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ200200021
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe396e7316c535d3ad98c484f22ebe9afc6907e1fc38d15d773bf9eabca378499. 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/FRZ200200021.
  date published: 2026-07-08T03:22:41Z
audio: Chopin: 24 Preludes, Op. 28: No. 17 in A-Flat Major
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  additional property: Mode (Major/Minor)
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  additional property: Danceability
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  additional property: Valence (Positivity)
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Chopin: 24 Preludes, Op. 28: No. 24 in D Minor
type: MusicRecording
duration: PT2M40S
duration ms: 160386
explicit: false
by artist: Frédéric Chopin
by artist: Nikolai Lugansky
in album: Nikolai Lugansky Plays Chopin
  type: MusicAlbum
  date published: 2022-05-27
genre: classical
genre: early-romantic-era
genre: polish-classical
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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
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additional property: OTSVerificationAPI
  type: PropertyValue
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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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d70478fe4e18c3b716c59d250e56c918a798f919d3df1afda190022b660aa11. 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/FRZ200200028.
  date published: 2026-07-08T08:56:20Z
audio: Chopin: 24 Preludes, Op. 28: No. 24 in D Minor
  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
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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: Valence (Positivity)
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Chopin: 12 Études, Op. 10: No. 1 in C Major
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duration: PT2M1S
duration ms: 121826
explicit: false
by artist: Frédéric Chopin
by artist: Nikolai Lugansky
in album: Nikolai Lugansky Plays Chopin
  type: MusicAlbum
  date published: 2022-05-27
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: FRZ209908201
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/FRZ209908201
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
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ff2c4a521256861bea8fb9d7e1ab920acca9abdb1ea99f2956b794b3152849. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRZ209908201.
  date published: 2026-07-06T06:56:49Z
audio: Chopin: 12 Études, Op. 10: No. 1 in C Major
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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Chopin: 12 Études, Op. 10: No. 2 in A Minor
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duration: PT1M20S
duration ms: 80466
explicit: false
by artist: Frédéric Chopin
by artist: Nikolai Lugansky
in album: Nikolai Lugansky Plays Chopin
  type: MusicAlbum
  date published: 2022-05-27
genre: classical
genre: early-romantic-era
genre: polish-classical
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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
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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
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111c8be9652f44ccb2873a3882d767dfac1c762d43268f41975ecf16f0617919. 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/FRZ209908202.
  date published: 2026-07-08T08:56:20Z
audio: Chopin: 12 Études, Op. 10: No. 2 in A Minor
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  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: Danceability
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Chopin: 12 Études, Op. 10: No. 3 in E Major "Tristesse"
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by artist: Nikolai Lugansky
in album: Nikolai Lugansky Plays Chopin
  type: MusicAlbum
  date published: 2022-05-27
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: FRZ209908203
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
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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
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a04e2d6281431ac1660c01ee4783f2cffcf6e6d645e4313106581196c6867d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T17:35:24Z), 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/FRZ209908203.
  date published: 2026-07-21T17:35:24Z
audio: Chopin: 12 Études, Op. 10: No. 3 in E Major "Tristesse"
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  additional property: Mode (Major/Minor)
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  additional property: Valence (Positivity)
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Chopin: 12 Études, Op. 10: No. 4 in C-Sharp Minor
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duration: PT1M59S
duration ms: 119560
explicit: false
by artist: Frédéric Chopin
by artist: Nikolai Lugansky
in album: Nikolai Lugansky Plays Chopin
  type: MusicAlbum
  date published: 2022-05-27
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: FRZ209908204
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: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d489196bd504ff2ed4d0864c6a08d40ec701a5356196cc49744eb6b4389c44. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRZ209908204.
  date published: 2026-07-02T03:55:08Z
audio: Chopin: 12 Études, Op. 10: No. 4 in C-Sharp Minor
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  additional property: Valence (Positivity)
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Chopin: 12 Études, Op. 10: No. 5 in G-Flat Major
type: MusicRecording
duration: PT1M45S
duration ms: 105866
explicit: false
by artist: Frédéric Chopin
by artist: Nikolai Lugansky
in album: Nikolai Lugansky Plays Chopin
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  date published: 2022-05-27
genre: classical
genre: early-romantic-era
genre: polish-classical
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additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: OTSHash
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/FRZ209908205
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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb228c02e3ce5faafad6b567a2db717377a82bb0d989db3bebd4666f699bc1e6. 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/FRZ209908205.
  date published: 2026-07-08T03:53:27Z
audio: Chopin: 12 Études, Op. 10: No. 5 in G-Flat Major
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Chopin: 12 Études, Op. 10: No. 6 in E-Flat Minor
type: MusicRecording
duration: PT3M58S
duration ms: 238600
explicit: false
by artist: Frédéric Chopin
by artist: Nikolai Lugansky
in album: Nikolai Lugansky Plays Chopin
  type: MusicAlbum
  date published: 2022-05-27
genre: classical
genre: early-romantic-era
genre: polish-classical
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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
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ209908206
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5daa4259adf2666886f51979f70390c95887e845265b3e3511cb5e77b466f0c4. 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/FRZ209908206.
  date published: 2026-07-08T03:20:19Z
audio: Chopin: 12 Études, Op. 10: No. 6 in E-Flat Minor
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  additional property: Danceability
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Chopin: 12 Études, Op. 10: No. 8 in F Major
type: MusicRecording
duration: PT2M11S
duration ms: 131893
explicit: false
by artist: Frédéric Chopin
by artist: Nikolai Lugansky
in album: Nikolai Lugansky Plays Chopin
  type: MusicAlbum
  date published: 2022-05-27
genre: classical
genre: early-romantic-era
genre: polish-classical
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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
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additional property: OTSVerificationAPI
  type: PropertyValue
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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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f8284cc67f878adcecfd8e16ddfe5eba1b830ee6f6ff04b86b8ffe44e83c76. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRZ209908208.
  date published: 2026-07-06T01:25:57Z
audio: Chopin: 12 Études, Op. 10: No. 8 in F Major
  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: Danceability
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  additional property: Speechiness
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Chopin: 12 Études, Op. 10: No. 9 in F Minor
type: MusicRecording
duration: PT2M3S
duration ms: 123506
explicit: false
by artist: Frédéric Chopin
by artist: Nikolai Lugansky
in album: Nikolai Lugansky Plays Chopin
  type: MusicAlbum
  date published: 2022-05-27
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: FRZ209908209
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
  type: PropertyValue
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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/FRZ209908209
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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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb992756986eed7cbce75f5e084bca852361842e74be02815bc18ea543339e8a0. 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/FRZ209908209.
  date published: 2026-07-08T03:53:27Z
audio: Chopin: 12 Études, Op. 10: No. 9 in F Minor
  type: AudioObject
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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
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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: Valence (Positivity)
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Chopin: 12 Études, Op. 10: No. 11 in E-Flat Major
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duration: PT3M2S
duration ms: 182200
explicit: false
by artist: Frédéric Chopin
by artist: Nikolai Lugansky
in album: Nikolai Lugansky Plays Chopin
  type: MusicAlbum
  date published: 2022-05-27
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: FRZ209908211
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
  type: PropertyValue
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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/FRZ209908211
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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd367c08b71e77d87915b4d97d16999d52c85ef8c00824184ebb3aa30bdc9a4. 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/FRZ209908211.
  date published: 2026-07-08T08:56:20Z
audio: Chopin: 12 Études, Op. 10: No. 11 in E-Flat Major
  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
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  additional property: Danceability
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  additional property: Energy
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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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Chopin: 12 Études, Op. 10: No. 12 in C Minor "Revolutionary"
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duration: PT2M48S
duration ms: 168706
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by artist: Frédéric Chopin
by artist: Nikolai Lugansky
in album: Nikolai Lugansky Plays Chopin
  type: MusicAlbum
  date published: 2022-05-27
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: FRZ209908212
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
  type: PropertyValue
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d08ba2363e13ea4ed1ba20d6576e497fad88e9bd4a6d203548de23a1749a72. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRZ209908212.
  date published: 2026-07-02T05:09:12Z
audio: Chopin: 12 Études, Op. 10: No. 12 in C Minor "Revolutionary"
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  additional property: Mode (Major/Minor)
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  additional property: Loudness (dB)
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Chopin: 12 Études, Op. 25: No. 1 in A-Flat Major "Aeolian Harp"
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duration: PT2M33S
duration ms: 153733
explicit: false
by artist: Frédéric Chopin
by artist: Nikolai Lugansky
in album: Nikolai Lugansky Plays Chopin
  type: MusicAlbum
  date published: 2022-05-27
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: FRZ209908213
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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subject of: OpenTimestamps Proof of Existence
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Chopin: 12 Études, Op. 25: No. 5 in E Minor
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:53:27Z
audio: Chopin: 12 Études, Op. 25: No. 5 in E Minor
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Chopin: 12 Études, Op. 25: No. 10 in B Minor
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:53:27Z
audio: Chopin: 12 Études, Op. 25: No. 10 in B Minor
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Chopin: 12 Études, Op. 25: No. 11 in A Minor "Winter Wind"
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: Chopin: 12 Études, Op. 25: No. 11 in A Minor "Winter Wind"
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Chopin: 12 Études, Op. 25: No. 12 in C Minor
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-07T16:07:00Z
audio: Chopin: 12 Études, Op. 25: No. 12 in C Minor
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Bach: Work of Art
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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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    date published: 2026-07-08T08:56:20Z
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Mass in B Minor, BWV 232, Pt. 1: IV. Gloria in excelsis (chorus)
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OpenTimestamps Proof of Existence
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Tchaikovsky: Swan Lake, Op. 20, Act 2: No. 10, Scene. Moderato
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Tchaikovsky: The Sleeping Beauty, Op. 66, Act I "The Spell": No. 6, Waltz
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:53:27Z
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Tchaikovsky: Violin Concerto in D Major, Op. 35: II. Canzonetta. Andante
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T11:38:34Z
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Tchaikovsky / Orch. Ducros: 6 Pieces, Op. 51: No. 6, Valse sentimentale
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-13T13:32:09Z
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Tchaikovsky: The Nutcracker, Op. 71, Act II: No. 14a, Pas de deux. Andante maestoso
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Tchaikovsky: The Nutcracker, Op. 71, Act II: No. 14a, Pas de deux. Andante maestoso
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Tchaikovsky: Violin Concerto in D Major, Op. 35: I. Allegro moderato
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:30:09Z
audio: Tchaikovsky: Violin Concerto in D Major, Op. 35: I. Allegro moderato
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Tchaikovsky: Symphony No. 1, Op. 13 "Winter Daydreams": I. Daydreams on a Winter Journey. Allegro tranquillo
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  date published: 2026-07-02T03:55:08Z
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Tchaikovsky: Symphony No. 1, Op. 13 "Winter Daydreams": IV. Finale. Andante lugubre - Allegro moderato
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  date published: 2026-07-02T03:30:09Z
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Tchaikovsky / Arr. Stetsuk for Cello and Orchestra: 16 Children's Songs, Op. 54: No. 10, Lullaby in a Storm
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track: The Nutcracker, Op. 71, Act I Scene 1: March
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The Nutcracker, Op. 71, Act I Scene 1: March
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:53:27Z
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The Nutcracker, Op. 71, Act II Scene 3: Waltz of the Flowers
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:53:27Z
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The Nutcracker, Op. 71, Act II Scene 3: Pas de deux, Dance of the Sugar-Plum Fairy - Coda [to Pas de deux]
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T08:56:20Z
audio: The Nutcracker, Op. 71, Act II Scene 3: Pas de deux, Dance of the Sugar-Plum Fairy - Coda [to Pas de deux]
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The Nutcracker, Op.71, Divertissement: Final Waltz and Apotheosis
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T08:56:20Z
audio: The Nutcracker, Op.71, Divertissement: Final Waltz and Apotheosis
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String Quartet No. 2 in D Major: III. Nocturne (Andante)
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: String Quartet No. 2 in D Major: III. Nocturne (Andante)
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Le Sacre du printemps, Pt. 1: L'Adoration de la Terre, 2. Les Augures printaniers - Danses des adolescentes (Tempo giusto)
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-22T05:39:04Z
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Suite for Jazz Orchestra No. 1: III. Foxtrot
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Piano Concerto No. 2 in C Minor, Op. 18: I. Moderato
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1812 Overture, Op. 49 (conclusion)
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Sad Violin
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Sonatas, Op. 120, Four Serious Songs, Op. 121
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Igor Raykhelson: Piano & Chamber Music, Vol. 2
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J.S.Bach: Goldberg Variations BWV 988
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Brahms: Cello Sonatas
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The Pipe Organ of the Riga Cathedral
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Raykhelson: Orchestral Music, Vol. 3
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track: Chopin: Cello Sonata in G Minor, Op. 65: IV. Finale. Allegro
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Rachmaninov: Trio élégiaque in D Minor, Op. 9 & Shostakovich: Piano Trio in E Minor, Op. 67
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ショスタコーヴィチ：チェロ・ソナタ 作品 40、ヴィオラ・ソナタ 作品147
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Bach: Cello Suites Nos. 1 - 6, BWV 1007 - 1012
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Mozart: Violin Sonatas Nos. 18, 24, and 27 (Arr. for Cello)
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Shostakovich: Piano Trio No. 2, Op. 67
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OpenTimestamps Proof of Existence
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Symphony No. 1 in G Minor, Op. 13 'Winter Daydreams': II Adagio cantabile, ma non tanto
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Swan Lake, Op. 20, Act I: No. 2, Valse in A-Flat Major (Tempo di valse)
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Swan Lake, Op. 20, Act II: No. 13, Danses des cygnes: IV. Allegro moderato
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The Seasons, Op. 37a: VI. June, Barcarolle (Andante cantabile)
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Violin Concerto in D Major, Op. 35: I. Allegro moderato
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Sleeping Beauty, Op. 66, Act I "The Spell": No. 6, Valse (Allegro: Tempo di valse)
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The Nutcracker, Op. 71, Act II Scene 3, 14. Pas de deux: a. Pas de deux
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track: Tchaikovsky / Arr. Stetsuk for Cello and Orchestra: 6 Romances, Op. 57: No. 3, Do Not Ask
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track: Tchaikovsky / Arr. Stetsuk for Cello and Orchestra: 7 Romances, Op. 47: No. 6, Does the Day Reign?

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OpenTimestamps Proof of Existence
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date published: 2026-06-13T17:25:41Z

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Tchaikovsky / Arr. Stetsuk for Cello and Orchestra: 6 Romances, Op. 16: No. 5, Thy Radiant Image
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Tchaikovsky / Arr. Stetsuk for Cello and Orchestra: 7 Romances, Op. 47: No. 6, Does the Day Reign?
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Verbier Festival - 25 Years of Excellence
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Suite for Piano and Orchestra: 1. Snowflakes. Allegro vivace - Live
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Suite for Piano and Orchestra: 3. Polka - Live
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Suite for Piano and Orchestra: 4. Career. Presto - Live
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Piano Trio No. 1 in B Major, Op. 8: 1. Allegro con brio - Live
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Rachmaninov: Piano Concerto No. 4 in G Minor, Op. 40: I. Allegro vivace, Pt. 7
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Rachmaninov: Piano Concerto No. 4 in G Minor, Op. 40: I. Allegro vivace, Pt. 8
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Rachmaninov: Piano Concerto No. 4 in G Minor, Op. 40: I. Allegro vivace, Pt. 9
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  date published: 2026-07-02T11:34:59Z
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Rachmaninov: Piano Concerto No. 4 in G Minor, Op. 40: I. Allegro vivace, Pt. 10
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Rachmaninov: Piano Concerto No. 4 in G Minor, Op. 40: I. Allegro vivace, Pt. 11
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Rachmaninov: Piano Concerto No. 4 in G Minor, Op. 40: I. Allegro vivace, Pt. 12
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  additional property: Loudness (dB)
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Rachmaninov: Piano Concerto No. 4 in G Minor, Op. 40: I. Allegro vivace, Pt. 13
type: MusicRecording
duration: PT0M46S
duration ms: 46640
explicit: false
by artist: Sergei Rachmaninoff
by artist: Nikolai Lugansky
by artist: Sakari Oramo
by artist: City Of Birmingham Symphony Orchestra
in album: Rachmaninov: Piano Concerto No. 4 - Chopin, Beethoven
  type: MusicAlbum
  date published: 2025-02-19
genre: classical
genre: classical-piano
isrc code: GBELP2400065
additional property: CopyrightID