The Lark Quartet
type: MusicGroup
genre: chamber music
genre: minimalism
popularity: 7
followers: 316
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4161759e20c60013ca683ba5672eefef1841d796dc3ce8abdf3bc3f3ce8bb727. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/040b4015-d8bb-4b97-8a18-8deb22871f00.json and https://artists.proofprofile.net/proofs/artist/040b4015-d8bb-4b97-8a18-8deb22871f00.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T02:39:16Z
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album: Schoenberg & Zemlinsky String Quartets
  type: MusicAlbum
  date published: 2006-01-01
album: Schnittke: String Quartets Nos. 2 & 3, Piano Quintet
  type: MusicAlbum
  date published: 2006-01-01
album: Schumann Quartets Op. 41, Nos. 1 & 3
  type: MusicAlbum
  date published: 2006-02-16
album: Borodin: String Quartets Nos. 1 & 2
  type: MusicAlbum
  date published: 2006-02-21
album: Klap Ur Handz
  type: MusicAlbum
  date published: 2006-10-10
album: Schickele: Sextet, String Quartet No. 2 "In Memorium", Quintet No. 2 for Piano and Strings
  type: MusicAlbum
  date published: 2008-03-17
album: Composing America: The Lark Quartet
  type: MusicAlbum
  date published: 2014-02-03
album: Composing America
  type: MusicAlbum
  date published: 2014-02-11
album: Composing America
  type: MusicAlbum
  date published: 2014-02-11
album: A Farewell Celebration
  type: MusicAlbum
  date published: 2019-08-23
album: A Farewell Celebration
  type: MusicAlbum
  date published: 2019-08-23
album: Cumbia Navideña
  type: MusicAlbum
  date published: 2024-11-01
  track: Cumbia Navideña
    type: MusicRecording
    duration: PT6M0S
    duration ms: 360363
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    by artist: The Lark Quartet
    in album: Cumbia Navideña
      type: MusicAlbum
      date published: 2024-11-01
    genre: chamber music
    genre: minimalism
    isrc code: QZZ8A2496720
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    additional property: OTSTimestamp
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    additional property: OTSVerifyInstructions
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      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
    subject of: OpenTimestamps Proof of Existence
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0e693764d7fd7ae3a07cc865ab3dba9045a607aaab213779913252566260b3. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:06:09Z), 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/QZZ8A2496720.
      date published: 2026-07-16T02:06:09Z
    audio: Cumbia Navideña
      type: AudioObject
      additional property: Tempo (BPM)
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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
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        value: G
      additional property: Mode Name
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