Verdi Quartett
type: MusicGroup
genre: chamber music
popularity: 9
followers: 566
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    by artist: Franz Schubert
    by artist: Verdi Quartett
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      date published: 2018-04-20
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    genre: classical
    genre: classical-piano
    genre: chamber-music
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-07T16:54:37Z
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  track: String Quartet in C Minor: II. Andantino
  track: String Quartet in C Minor: III. Intermezzo. Allegretto
  track: String Quartet in C Minor: IV. Variazione con finale fugato
  track: String Quartet No. 1 in G Minor: I. Allegro moderato
  track: String Quartet No. 1 in G Minor: II. Minuet
  track: String Quartet No. 1 in G Minor: III. Romance. Andante sostenuto
  track: String Quartet No. 1 in G Minor: IV. Finale. Rondo capriccioso
  track: String Quartet No. 2 in A Minor: I. Prelude. Allegro appassionato
  track: String Quartet No. 2 in A Minor: II. Romance. Largo
  track: String Quartet No. 2 in A Minor: III. Scherzo. Allegro
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album: Richter, Dittersdorf & Rosetti: String Quartets
album: Brahms: String Quartets, Quintets & Sextets
album: Heller: Herbstmusik
album: Schubert: Famous String Quartets, D. 804 & D. 810 (Famous Classical Music)
album: Schubert: Famous String Quartets, D. 353, D. 703 & D. 887 (Famous Classical Music)
album: Schubert: String Quartets Nos. 11-15
album: Schubert, F.: Complete String Quartets
album: Brahms, J.: String Sextet No. 1 / String Quintet No. 2
album: Brahms: String Quintet No. 1 & String Sextet No. 2
album: Brahms, J.: String Quintet No. 1 / String Sextet No. 2
album: Verdi: String Quartet in E Minor / Britten: String Quartet No. 3, Op. 94
album: Schubert: String Quintet in C Major, D. 956 - Overture in C Minor, D. 8A
album: Schubert: String Quartets Nos. 9-10 and D. 103 "Quartettsatz"
album: Schubert: String Quartets Nos. 4, 11, and 12 "Quartettsatz"
album: Schubert: String Quartets Nos. 1, 6-7
album: Schubert: String Quartet No. 15 in G Major, D. 887 - String Quartet No. 5 in B-Flat Major, D. 68
album: Schubert: String Quartet No. 13 in A Minor, D. 804 - String Quartet No. 3 in B-Flat Major, D. 36
album: For Your Evening I Crisantemi, Romances op.94, Fairy tale for cello and piano, Goldberg Variations BWV988….. (Classical Masterpieces)
album: Toch: String Quartets Nos. 8 & 9
album: Toch: String Quartets Nos. 6 & 12
album: Schubert: String Quartet No. 14 in D Minor, D. 810 - String Quartet No. 2 in C Major, D. 32
album: Schubert: String Quartet No. 10 - Minuets - 5 German Dances
album: Brahms: String Quartet in C Minor, Op. 51
album: Brahms: Clarinet Quintet in B Minor, Op. 115 & String Quartet No. 3 in B-Flat Major, Op. 67
album: Franz Schubert: String Quartet D353, D887&D804 Rosamunde (Classical Masterpieces)
album: Franz Schubert: Stringquartett D703 &D810 The Death and the Maiden (Classical Masterpieces)
album: Berger: Piano Quintet
album: Shostakovich: String Quartet No. 3 in F Major, Op. 73
album: La Magie Des Plus Beaux Adagios, Vol. 2
album: Adagio
album: Schubert: String Quartet No. 13 in A Minor, D. 804 / String Quartet No. 3 in B-Flat Major, D. 36
album: Schubert: String Quartet No. 10 / Minuets / 5 German Dances
album: Brahms: String Quartet in C Minor, Op. 51, No. 1 / String Quartet in A Minor, Op. 51, No. 2
album: Schubert: String Quintet in C Major, D. 956 / Overture in C Minor, D. 8A
album: Spannende Krimiabende - Classical Music fo Thriller Evening
album: Schubert: String Quartet No. 14 in D Minor, D. 810 / String Quartet No. 2 in C Major, D. 32
album: Schubert: String Quartet No. 15 in G Major, D. 887 / String Quartet No. 5 in B-Flat Major, D. 68
album: Essen Und Verwohnen - Classical Music for Dinner
album: Brahms: Clarinet Quintet / String Quartet No. 3
album: Romantische Leseabende

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String Quartet in C Minor: II. Andantino
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  date published: 2026-07-08T03:20:19Z
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String Quartet in C Minor: III. Intermezzo. Allegretto
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T20:09:33Z
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  date published: 2026-07-08T03:20:19Z
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  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.319
  additional property: Energy
    type: PropertyValue
    value: 0.112
  additional property: Speechiness
    type: PropertyValue
    value: 0.045
  additional property: Acousticness
    type: PropertyValue
    value: 0.949
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.807
  additional property: Liveness
    type: PropertyValue
    value: 0.102
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.231
  additional property: Loudness (dB)
    type: PropertyValue
    value: -21.611
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Minor

String Quartet No. 1 in G Minor: I. Allegro moderato
type: MusicRecording
duration: PT10M1S
duration ms: 601000
explicit: false
by artist: Ralph Vaughan Williams
by artist: Verdi Quartett
in album: Vaughan Williams: The Complete String Quartets
  type: MusicAlbum
  date published: 2024-05-31
isrc code: DEB201734505
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T03:44:53+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x62f43226bfb53de22f04c12feaad4af1ba5dcc42407dc12457cdce5027dda51d
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/DEB201734505
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 0x62f43226bfb53de22f04c12feaad4af1ba5dcc42407dc12457cdce5027dda51d. 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/DEB201734505.
  date published: 2026-07-08T03:20:19Z
audio: String Quartet No. 1 in G Minor: I. Allegro moderato
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 115.864
  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: 0.15
  additional property: Energy
    type: PropertyValue
    value: 0.047
  additional property: Speechiness
    type: PropertyValue
    value: 0.045
  additional property: Acousticness
    type: PropertyValue
    value: 0.917
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.838
  additional property: Liveness
    type: PropertyValue
    value: 0.067
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.037
  additional property: Loudness (dB)
    type: PropertyValue
    value: -25.334
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major

String Quartet No. 1 in G Minor: II. Minuet
type: MusicRecording
duration: PT4M8S
duration ms: 248000
explicit: false
by artist: Ralph Vaughan Williams
by artist: Verdi Quartett
in album: Vaughan Williams: The Complete String Quartets
  type: MusicAlbum
  date published: 2024-05-31
isrc code: DEB201734506
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T07:51:11+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5773d7ffe5e9cfd9f85b8adb9701f530a3b71151c9e45cfce32628b43a243da9
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/DEB201734506
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 0x5773d7ffe5e9cfd9f85b8adb9701f530a3b71151c9e45cfce32628b43a243da9. 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/DEB201734506.
  date published: 2026-07-08T03:20:19Z
audio: String Quartet No. 1 in G Minor: II. Minuet
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 133.254
  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: 0.42
  additional property: Energy
    type: PropertyValue
    value: 0.067
  additional property: Speechiness
    type: PropertyValue
    value: 0.039
  additional property: Acousticness
    type: PropertyValue
    value: 0.889
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.929
  additional property: Liveness
    type: PropertyValue
    value: 0.166
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.28
  additional property: Loudness (dB)
    type: PropertyValue
    value: -27.185
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major

String Quartet No. 1 in G Minor: III. Romance. Andante sostenuto
type: MusicRecording
duration: PT7M18S
duration ms: 438233
explicit: false
by artist: Ralph Vaughan Williams
by artist: Verdi Quartett
in album: Vaughan Williams: The Complete String Quartets
  type: MusicAlbum
  date published: 2024-05-31
isrc code: DEB201734507
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-30T12:53:46+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x83a4bfc7572f959790051e045528cc40bd48dba34481ae138ce3691043fc4ace
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960264
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960264
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB201734507
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T14:36:16Z
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 0x83a4bfc7572f959790051e045528cc40bd48dba34481ae138ce3691043fc4ace. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEB201734507.
  date published: 2026-07-30T14:36:16Z
audio: String Quartet No. 1 in G Minor: III. Romance. Andante sostenuto
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 104.095
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.14
  additional property: Energy
    type: PropertyValue
    value: 0.041
  additional property: Speechiness
    type: PropertyValue
    value: 0.046
  additional property: Acousticness
    type: PropertyValue
    value: 0.93
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.705
  additional property: Liveness
    type: PropertyValue
    value: 0.088
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.036
  additional property: Loudness (dB)
    type: PropertyValue
    value: -29.358
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Minor

String Quartet No. 1 in G Minor: IV. Finale. Rondo capriccioso
type: MusicRecording
duration: PT8M41S
duration ms: 521286
explicit: false
by artist: Ralph Vaughan Williams
by artist: Verdi Quartett
in album: Vaughan Williams: The Complete String Quartets
  type: MusicAlbum
  date published: 2024-05-31
isrc code: DEB201734508
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T08:37:18+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf7a18ce974d9697c5d65263cbf3c78f5cf9c3b6971fdb4e9d1894ada3e2c41b2
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/DEB201734508
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 0xf7a18ce974d9697c5d65263cbf3c78f5cf9c3b6971fdb4e9d1894ada3e2c41b2. 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/DEB201734508.
  date published: 2026-07-08T03:20:19Z
audio: String Quartet No. 1 in G Minor: IV. Finale. Rondo capriccioso
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 149.436
  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: 0.36
  additional property: Energy
    type: PropertyValue
    value: 0.142
  additional property: Speechiness
    type: PropertyValue
    value: 0.04
  additional property: Acousticness
    type: PropertyValue
    value: 0.911
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.846
  additional property: Liveness
    type: PropertyValue
    value: 0.101
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.191
  additional property: Loudness (dB)
    type: PropertyValue
    value: -22.894
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major

String Quartet No. 2 in A Minor: I. Prelude. Allegro appassionato
type: MusicRecording
duration: PT4M22S
duration ms: 262114
explicit: false
by artist: Ralph Vaughan Williams
by artist: Verdi Quartett
in album: Vaughan Williams: The Complete String Quartets
  type: MusicAlbum
  date published: 2024-05-31
isrc code: DEB201734509
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T11:28:11+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x555a50861f8a8c96bbcbd909dac69a5bfeab78ed2041e12726653cdf6f7a6f76
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/DEB201734509
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 0x555a50861f8a8c96bbcbd909dac69a5bfeab78ed2041e12726653cdf6f7a6f76. 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/DEB201734509.
  date published: 2026-07-08T03:20:19Z
audio: String Quartet No. 2 in A Minor: I. Prelude. Allegro appassionato
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 112.288
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.178
  additional property: Energy
    type: PropertyValue
    value: 0.114
  additional property: Speechiness
    type: PropertyValue
    value: 0.051
  additional property: Acousticness
    type: PropertyValue
    value: 0.976
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.834
  additional property: Liveness
    type: PropertyValue
    value: 0.181
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.076
  additional property: Loudness (dB)
    type: PropertyValue
    value: -21.375
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Minor

String Quartet No. 2 in A Minor: II. Romance. Largo
type: MusicRecording
duration: PT8M17S
duration ms: 497500
explicit: false
by artist: Ralph Vaughan Williams
by artist: Verdi Quartett
in album: Vaughan Williams: The Complete String Quartets
  type: MusicAlbum
  date published: 2024-05-31
isrc code: DEB201734510
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T08:56:00+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd1af5ed60aade9131e5195de1fb37d77ec47ccdbf43ab8fb89f666f967bf9ab6
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/DEB201734510
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 0xd1af5ed60aade9131e5195de1fb37d77ec47ccdbf43ab8fb89f666f967bf9ab6. 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/DEB201734510.
  date published: 2026-07-08T03:20:19Z
audio: String Quartet No. 2 in A Minor: II. Romance. Largo
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 173.535
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.074
  additional property: Energy
    type: PropertyValue
    value: 0.039
  additional property: Speechiness
    type: PropertyValue
    value: 0.046
  additional property: Acousticness
    type: PropertyValue
    value: 0.903
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.886
  additional property: Liveness
    type: PropertyValue
    value: 0.134
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.054
  additional property: Loudness (dB)
    type: PropertyValue
    value: -26.951
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Minor

String Quartet No. 2 in A Minor: III. Scherzo. Allegro
type: MusicRecording
duration: PT3M30S
duration ms: 210296
explicit: false
by artist: Ralph Vaughan Williams
by artist: Verdi Quartett
in album: Vaughan Williams: The Complete String Quartets
  type: MusicAlbum
  date published: 2024-05-31
isrc code: DEB201734511
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T18:55:23+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x803470231e7a02fb1140f7972226cd4dcc396352a0ca6c01ceabf7f736cb0785
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960455
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960455
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB201734511
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T19:53:13Z
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 0x803470231e7a02fb1140f7972226cd4dcc396352a0ca6c01ceabf7f736cb0785. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEB201734511.
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    date published: 2026-07-08T08:56:20Z
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La Magie Des Plus Beaux Adagios, Vol. 2
type: MusicAlbum
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  additional property: OTSVerificationAPI
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  additional property: OTSVerifyInstructions
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-31T06:42:11Z
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track: Suite Pour Clavecin No. 11 En Ré Mineur, HWV 437: Sarabande
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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 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
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    date published: 2026-07-08T03:20:19Z
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  by artist: Ivan Moravec
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  subject of: OpenTimestamps Proof of Existence
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track: Sonate Pour Piano No. 16 En Do Majeur, K. 545, "Sonata Facile": II. Andante
track: Quintette En Do Majeur, D. 956: II. Adagio
track: Le Songe D'une Nuit D'été, Op. 61: VII. Nocturne, Con Moto Tranquillo
track: Nocturne Pour Violoncelle Et Harpe
track: Peer Gynt Suite No. 2, Op. 55: IV. Chanson De Solveig
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OTSBitcoinBlockVerifyURL
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OTSVerificationAPI
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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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf101deea965b4a2d6ed330b4b5358f676fb1245090cec010a70bd32e11cfe6b9. 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/FRV770601002.
date published: 2026-07-08T03:20:19Z

Concerto No. 20 En Ré Mineur Pour Piano Et Orchestre, K. 466: II. Romance
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Sonate Pour Piano No. 16 En Do Majeur, K. 545, "Sonata Facile": II. Andante
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Sonate Pour Piano No. 16 En Do Majeur, K. 545, "Sonata Facile": II. Andante
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Quintette En Do Majeur, D. 956: II. Adagio
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-07T18:39:05Z
audio: Quintette En Do Majeur, D. 956: II. Adagio
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Le Songe D'une Nuit D'été, Op. 61: VII. Nocturne, Con Moto Tranquillo
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by artist: Oregon Bach Festivals Choir & Orchestra
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additional property: OTSVerificationAPI
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Le Songe D'une Nuit D'été, Op. 61: VII. Nocturne, Con Moto Tranquillo
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Peer Gynt Suite No. 2, Op. 55: IV. Chanson De Solveig
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Prélude, Fugue & Variation En Si Mineur, Op. 18: I. Prélude
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Adagio
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Schubert: String Quartet No. 13 in A Minor, D. 804 / String Quartet No. 3 in B-Flat Major, D. 36
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Schubert: String Quartet No. 10 / Minuets / 5 German Dances
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Brahms: String Quartet in C Minor, Op. 51, No. 1 / String Quartet in A Minor, Op. 51, No. 2
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Schubert: String Quintet in C Major, D. 956 / Overture in C Minor, D. 8A
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Spannende Krimiabende - Classical Music fo Thriller Evening
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Schubert: String Quartet No. 14 in D Minor, D. 810 / String Quartet No. 2 in C Major, D. 32
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Schubert: String Quartet No. 15 in G Major, D. 887 / String Quartet No. 5 in B-Flat Major, D. 68
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Essen Und Verwohnen - Classical Music for Dinner
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Brahms: Clarinet Quintet / String Quartet No. 3
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Romantische Leseabende
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