Richard Margison
type: MusicGroup
genre: opera
description: Richard Charles Margison, OC (born 16 July 1953) is a Canadian operatic tenor and lives in Stouffville, Ontario, Canada. Background Margison began his career in Victoria, BC, where, he sang folk song
popularity: 3
followers: 79
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-17T08:11:48Z
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album: French And Italian Arias
  type: MusicAlbum
  date published: 2000-01-01
album: French And Italian Arias
  type: MusicAlbum
  date published: 2000-01-01
track: Don Carlo - 1886 Modena version / Act 2: "Dio, che nell'alma infodere"
  type: MusicRecording
  duration: PT4M41S
  duration ms: 281826
  explicit: false
  by artist: Giuseppe Verdi
  by artist: Richard Margison
  by artist: Dmitri Hvorostovsky
  by artist: Chorus of the Royal Opera House, Covent Garden
  by artist: Orchestra of the Royal Opera House, Covent Garden
  by artist: Bernard Haitink
  in album: Verdi: Don Carlo
    type: MusicAlbum
    date published: 1997-01-01
  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: 2026-07-08T03:22:41Z
  audio: Don Carlo - 1886 Modena version / Act 2: "Dio, che nell'alma infodere"
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    additional property: Key Name
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