Martin Jopp
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genre: chamber music
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-17T08:10:43Z
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track: Musical Offering, BWV 1079: Ricercar a 3

Musical Offering, BWV 1079: Ricercar a 3
type: MusicRecording
duration: PT5M8S
duration ms: 308226
explicit: false
by artist: Johann Sebastian Bach
by artist: Gottfried Von Der Goltz
by artist: Martin Jopp
by artist: Karl Kaiser
by artist: Ekkehard Weber
by artist: Michael Behringer
in album: Bach, J.S.: Musical Offering, Bwv 1079
  type: MusicAlbum
  date published: 2000-01-01
genre: classical
genre: classical-piano
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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
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T08:56:20Z
audio: Musical Offering, BWV 1079: Ricercar a 3
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