Monica Sinclair
type: MusicGroup
genre: opera
description: Monica Sinclair (23 March 19257 May 2002) was a British operatic contralto, who sang many roles with the Royal Opera, Covent Garden during the 1950s and 1960s, and appeared on stage and in recordings
popularity: 19
followers: 368
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc115f1366d031ab5f5c00db7282e76d767b27bb1af274236f1494d7a87d1d22d. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da8dfc4f-b0fa-47a4-9dd8-fd128d75c4a8.json and https://artists.proofprofile.net/proofs/artist/da8dfc4f-b0fa-47a4-9dd8-fd128d75c4a8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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album: Alcina
  type: MusicAlbum
  date published: 2000-01-01
album: The Gondoliers
  type: MusicAlbum
  date published: 2000-01-01
track: Soldiers’ Chorus (Faust)

Soldiers’ Chorus (Faust)
type: MusicRecording
duration: PT6M25S
duration ms: 385173
explicit: false
by artist: Charles Gounod
by artist: Margreta Elkins
by artist: Monica Sinclair
by artist: Robert Massard
by artist: Ambrosian Opera Chorus
by artist: London Symphony Orchestra
by artist: Richard Bonynge
in album: Best of Opera - Die 50 größten Opern-Arien
  type: MusicAlbum
  date published: 2011-01-01
popularity: 4
genre: opera
isrc code: GBF076610100
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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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  date published: 2026-07-08T03:53:27Z
audio: Soldiers’ Chorus (Faust)
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Time Signature
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  additional property: Danceability
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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  additional property: Key Name
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    value: Bb
  additional property: Mode Name
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