Viotta Ensemble
type: MusicGroup
genre: chamber music
popularity: 2
followers: 56
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-16T14:29:53Z
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album: The Romantic Era in the Nederlands
  type: MusicAlbum
  date published: 1970-01-01
album: The Romantic Era in the Nederlands
  type: MusicAlbum
  date published: 1994-06-01
  track: Allegro for 4 String Quartets in D Minor
album: Le Bal Masqué
  type: MusicAlbum
  date published: 1995-01-01
album: Le Bal masqué: Works by Poulenc, D'Indy, Roussel & Koechlin
  type: MusicAlbum
  date published: 2006-01-01
album: Pierné - Widor - Bréville
  type: MusicAlbum
  date published: 2007-11-09
album: Early 20th Century French Woodwind Chamber Music
  type: MusicAlbum
  date published: 2009-04-17
album: Dutch Chamber Music by Van Bree, Röntgen & Coenen
  type: MusicAlbum
  date published: 2024-10-25

Allegro for 4 String Quartets in D Minor
type: MusicRecording
duration: PT11M17S
duration ms: 677160
explicit: false
by artist: Viotta Ensemble
in album: The Romantic Era in the Nederlands
  type: MusicAlbum
  date published: 1994-06-01
genre: chamber music
isrc code: QMFMG1540933
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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
additional property: ProofProfileEvidenceStatus
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d6461bf41877a51a0240136db8c4ac88447935d309116486a2d61b4fd25852. 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/QMFMG1540933.
  date published: 2026-07-08T08:56:20Z
audio: Allegro for 4 String Quartets 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: 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
    type: PropertyValue
    value: F
  additional property: Mode Name
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