Penguin Cafe Orchestra
type: MusicGroup
genre: minimalism
description: The Penguin Cafe Orchestra (PCO) was an avant-pop band led by English guitarist Simon Jeffes. Co-founded with cellist Helen Liebmann, the band toured extensively during the 1980s and 1990s. The band's
popularity: 42
followers: 141512
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-12T19:24:56Z
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album: Preludes, Airs And Yodels (A Penguin Cafe Primer)
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  date published: 1996-01-01
  track: Perpetuum Mobile
track: Music for a Found Harmonium

Perpetuum Mobile
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duration: PT4M29S
duration ms: 269800
explicit: false
by artist: Penguin Cafe Orchestra
in album: Preludes, Airs And Yodels (A Penguin Cafe Primer)
  type: MusicAlbum
  date published: 1996-01-01
popularity: 44
isrc code: GBAAA8700127
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additional property: OTSTimestamp
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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: 2026-06-13T15:41:10Z
audio: Perpetuum Mobile
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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Music for a Found Harmonium
type: MusicRecording
duration: PT3M4S
duration ms: 184266
explicit: false
by artist: Simon Jeffes
by artist: Penguin Cafe Orchestra
by artist: James Galway
by artist: Phil Coulter
in album: Legends
  type: MusicAlbum
  date published: 1997
isrc code: USBC19704127
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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: 2026-07-07T18:50:38Z
audio: Music for a Found Harmonium
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