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album: Tchaikovsky: Complete Works For String Quartet. Vol. 1
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  date published: 1994
album: Tchaikovsky: Complete Works For String Quartet. Vol. 2
  type: MusicAlbum
  date published: 1994
album: Borodin: Chamber Music Vol. 3
  type: MusicAlbum
  date published: 1997
album: Alexander Borodin: Chamber Music Vol.1
  type: MusicAlbum
  date published: 1997
album: Borodin: Chamber Music Vol. 2
  type: MusicAlbum
  date published: 1997
album: Moscow String Quartet & Gary Graffman - Shostakovich, Schnittke
  type: MusicAlbum
  date published: 1998-04-21
album: Moscow String Quartet: Borodin, Stravinsky, Tchaikovsky
  type: MusicAlbum
  date published: 2006-10-07
album: Haydn - Seven Last Words of Christ
  type: MusicAlbum
  date published: 2009-11-13
album: Webern - Nono - Gubaidulina: Musica da Camera
  type: MusicAlbum
  date published: 2011-05-10
album: Beethoven String Quartets 10 & 11
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track: String Quartet No. 1 in A Major: II. Andante con moto
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    date published: 2026-07-29T21:09:47Z
  audio: String Quartet No. 1 in A Major: II. Andante con moto
track: String Quartet No. 1 in A Major: III. Scherzo. Prestissimo
track: String Quartet No. 1 in A Major: IV. Finale. Andante - Allegro risoluto
track: Piano Quintet in C Minor: I. Andante
track: String Quartet No. 2 in D Major: I. Allegro moderato
track: String Quartet No. 2 in D Major: II. Scherzo. Allegro
track: String Quartet No. 2 in D Major: III. Nocturne. Andante
track: String Quintet in F Minor: I. Allegro con brio

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String Quartet No. 1 in A Major: III. Scherzo. Prestissimo
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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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String Quartet No. 1 in A Major: IV. Finale. Andante - Allegro risoluto
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subject of: OpenTimestamps Proof of Existence
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Piano Quintet in C Minor: I. Andante
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  date published: 2026-07-08T03:20:19Z
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String Quartet No. 2 in D Major: I. Allegro moderato
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  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY330905083
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-08-01T00:40:43Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48262c794feea89bc5cacc8bf806741a88583c6483c1392b6fe019d099c6490d. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/NLY330905083.
  date published: 2026-08-01T00:40:43Z
audio: String Quartet No. 2 in D Major: I. Allegro moderato
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 163.139
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.173
  additional property: Energy
    type: PropertyValue
    value: 0.087
  additional property: Speechiness
    type: PropertyValue
    value: 0.043
  additional property: Acousticness
    type: PropertyValue
    value: 0.945
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.844
  additional property: Liveness
    type: PropertyValue
    value: 0.109
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.129
  additional property: Loudness (dB)
    type: PropertyValue
    value: -22.038
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

String Quartet No. 2 in D Major: II. Scherzo. Allegro
type: MusicRecording
duration: PT4M54S
duration ms: 294413
explicit: false
by artist: Alexander Borodin
by artist: Moscow String Quartet
in album: Borodin: Chamber Music
  type: MusicAlbum
  date published: 2009
genre: classical
genre: late-romantic-era
genre: early-modern-classical
genre: russian-romanticism
isrc code: NLY330905084
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T19:15:53+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x417f4cbbe5c84475d42ab9db094e555323ecf0c1843326381f3383a621738649
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957120
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/NLY330905084
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417f4cbbe5c84475d42ab9db094e555323ecf0c1843326381f3383a621738649. 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/NLY330905084.
  date published: 2026-07-08T03:22:41Z
audio: String Quartet No. 2 in D Major: II. Scherzo. Allegro
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 101.819
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.249
  additional property: Energy
    type: PropertyValue
    value: 0.177
  additional property: Speechiness
    type: PropertyValue
    value: 0.042
  additional property: Acousticness
    type: PropertyValue
    value: 0.955
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.817
  additional property: Liveness
    type: PropertyValue
    value: 0.097
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.258
  additional property: Loudness (dB)
    type: PropertyValue
    value: -22.222
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major

String Quartet No. 2 in D Major: III. Nocturne. Andante
type: MusicRecording
duration: PT8M4S
duration ms: 484400
explicit: false
by artist: Alexander Borodin
by artist: Moscow String Quartet
in album: Borodin: Chamber Music
  type: MusicAlbum
  date published: 2009
genre: classical
genre: late-romantic-era
genre: early-modern-classical
genre: russian-romanticism
isrc code: NLY330905085
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T12:41:23+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb5383a64e9192fd4592d77e46f8f283a6fcd51d80c53d692be7051aaa803c802
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957118
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY330905085
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5383a64e9192fd4592d77e46f8f283a6fcd51d80c53d692be7051aaa803c802. 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/NLY330905085.
  date published: 2026-07-08T03:20:19Z
audio: String Quartet No. 2 in D Major: III. Nocturne. Andante
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 90.561
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.131
  additional property: Energy
    type: PropertyValue
    value: 0.128
  additional property: Speechiness
    type: PropertyValue
    value: 0.056
  additional property: Acousticness
    type: PropertyValue
    value: 0.939
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.798
  additional property: Liveness
    type: PropertyValue
    value: 0.16
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.066
  additional property: Loudness (dB)
    type: PropertyValue
    value: -23.753
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Major

String Quintet in F Minor: I. Allegro con brio
type: MusicRecording
duration: PT10M42S
duration ms: 642466
explicit: false
by artist: Alexander Borodin
by artist: Alexander Gotthelf
by artist: Moscow String Quartet
in album: Borodin: Chamber Music
  type: MusicAlbum
  date published: 2009
genre: classical
genre: late-romantic-era
genre: early-modern-classical
genre: russian-romanticism
isrc code: NLY330905087
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-30T07:49:35+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3f1fc554aefd93ef2be6b1e3110add47da0dc4b464f68ba6b9d79705571658b5
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960225
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960225
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY330905087
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T08:04:30Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1fc554aefd93ef2be6b1e3110add47da0dc4b464f68ba6b9d79705571658b5. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/NLY330905087.
  date published: 2026-07-30T08:04:30Z
audio: String Quintet in F Minor: I. Allegro con brio
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 133.586
  additional property: Musical Key
    type: PropertyValue
    value: 8
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.326
  additional property: Energy
    type: PropertyValue
    value: 0.142
  additional property: Speechiness
    type: PropertyValue
    value: 0.047
  additional property: Acousticness
    type: PropertyValue
    value: 0.97
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.819
  additional property: Liveness
    type: PropertyValue
    value: 0.318
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.22
  additional property: Loudness (dB)
    type: PropertyValue
    value: -23.814
  additional property: Key Name
    type: PropertyValue
    value: Ab
  additional property: Mode Name
    type: PropertyValue
    value: Major