Sleep
type: MusicGroup
genre: doom metal
genre: drone
genre: sludge metal
genre: stoner rock
description: Sleep is a state of reduced mental and physical activity in which consciousness is altered and certain sensory activity is inhibited. During sleep, there is a marked decrease in muscle activity and in
popularity: 44
followers: 307027
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-12T19:24:56Z
album: Volume 1
  type: MusicAlbum
  date published: 1993
  track: Prey
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    by artist: Sleep
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      type: MusicAlbum
      date published: 1993
    genre: doom metal
    genre: drone
    genre: sludge metal
    genre: stoner rock
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-15T19:08:53Z
    audio: Prey
      type: AudioObject
      additional property: Tempo (BPM)
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album: Sleep's Holy Mountain
  type: MusicAlbum
  date published: 1993
album: Sleep's Holy Mountain
  type: MusicAlbum
  date published: 1993
album: Sleeps Holy Mountain
  type: MusicAlbum
  date published: 1993
album: Sleep's Holy Mountain
  type: MusicAlbum
  date published: 1993
album: Jerusalem
  type: MusicAlbum
  date published: 1999
album: Jerusalem
  type: MusicAlbum
  date published: 1999
album: Dopesmoker
  type: MusicAlbum
  date published: 2003
album: Dopesmoker
  type: MusicAlbum
  date published: 2003
album: The Clarity
  type: MusicAlbum
  date published: 2014
album: The Clarity
  type: MusicAlbum
  date published: 2017-02-10
album: The Clarity
  type: MusicAlbum
  date published: 2017-02-10
album: The Sciences
  type: MusicAlbum
  date published: 2018-04-20
album: The Sciences
  type: MusicAlbum
  date published: 2018-04-20
album: The Sciences
  type: MusicAlbum
  date published: 2018-04-20
album: The Sciences
  type: MusicAlbum
  date published: 2018-04-20
album: Leagues Beneath
  type: MusicAlbum
  date published: 2018-06-01
album: Dopesmoker
  type: MusicAlbum
  date published: 2022-08-26
track: Dragonaut

Dragonaut
type: MusicRecording
duration: PT5M42S
duration ms: 342733
explicit: false
by artist: Sleep
in album: Immortalised
  type: MusicAlbum
  date published: 2000-03-13
isrc code: GBBPB2102615
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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
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T05:09:12Z
audio: Dragonaut
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