Mark Rucker
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genre: classical
genre: opera
popularity: 22
followers: 80
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  date published: 2026-06-12T19:24:56Z
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album: Great Opera
  type: MusicAlbum
  date published: 2012-05-01
  track: Il barbiere di Siviglia (The Barber of Seville): Act I Duetto: Dunque io son... tu non m'inganni? (Rosina, Figaro)
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    duration: PT5M3S
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    by artist: Gioachino Rossini
    by artist: Franco de Grandis
    by artist: Sonia Ganassi
    by artist: Ingrid Kertesi
    by artist: Angelo Romero
    by artist: Roberto Servile
    by artist: Ramón Vargas
    by artist: Hungarian Radio Chorus
    by artist: Budapest Failoni Chamber Orchestra
    by artist: Will Humburg
    in album: Great Opera
      type: MusicAlbum
      date published: 2012-05-01
    popularity: 4
    genre: classical
    genre: opera
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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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-30T18:46:00Z
    audio: Il barbiere di Siviglia (The Barber of Seville): Act I Duetto: Dunque io son... tu non m'inganni? (Rosina, Figaro)
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      additional property: Loudness (dB)
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      additional property: Key Name
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        value: G
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album: Opera - 50 of the Best
  type: MusicAlbum
  date published: 2012-10-01
album: A Guided Tour of the Romantic Era, Vol. 8
  type: MusicAlbum
  date published: 2013-03-12
album: Become an Instant Expert: Verdi
  type: MusicAlbum
  date published: 2013-07-23
album: Verdi: Aida
  type: MusicAlbum
  date published: 2009-01-28
album: Verdi: Aida (Highlights)
  type: MusicAlbum
  date published: 2000-11-13
album: 50 of the Best: Verdi
  type: MusicAlbum
  date published: 2011-11-15