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genre: classical
genre: opera
popularity: 45
followers: 277
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  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 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. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-12T21:20:00Z
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  date published: 2004-05-08
  track: Le nozze di Figaro, K. 492: Sinfonia
  track: Le nozze di Figaro, K. 492: Act I No. 1: Duettino - Cinque...dieci...venti...trenta
  track: Le nozze di Figaro, K. 492: Act I No. 6: Aria - Non so piu cosa son faccio
  track: Le nozze di Figaro, K. 492: Act I No. 10: Aria - Non piu andrai, farfallone amoroso
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    by artist: Gabriele Sima
    by artist: Alexander Klinger
    by artist: Michael Roider
    by artist: Bo Skovhus
    by artist: Peter Koves
    by artist: Janusz Monarcha
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    additional property: OTSVerifyInstructions
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-08T08:56:20Z
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  track: Le nozze di Figaro, K. 492: Act II No. 12: Arietta - Voi, che sapete
album: A Guided Tour of the Classical Era, Vol. 2
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  date published: 2013-04-09
album: Lehár: Operettas
  type: MusicAlbum
  date published: 2021-06-18
album: Poetic Tones Pictures and Mazurkas
  type: MusicAlbum
  date published: 2024-05-24
album: Lehar: Lustige Witwe (Die)
  type: MusicAlbum
  date published: 2005-01-01

Le nozze di Figaro, K. 492: Sinfonia
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by artist: Judith Halász
by artist: Michelle Breedt
by artist: Orsolya Safar
by artist: Gabriele Sima
by artist: Alexander Klinger
by artist: Michael Roider
by artist: Bo Skovhus
by artist: Peter Koves
by artist: Janusz Monarcha
by artist: Renato Girolami
by artist: Nicolaus Esterhazy Sinfonia
by artist: Michael Halasz
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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
additional property: ProofProfileEvidenceStatus
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Le nozze di Figaro, K. 492: Sinfonia
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Le nozze di Figaro, K. 492: Act I No. 1: Duettino - Cinque...dieci...venti...trenta
type: MusicRecording
duration: PT2M45S
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by artist: Wolfgang Amadeus Mozart
by artist: Marina Mescheriakova
by artist: Judith Halász
by artist: Michelle Breedt
by artist: Orsolya Safar
by artist: Gabriele Sima
by artist: Alexander Klinger
by artist: Michael Roider
by artist: Bo Skovhus
by artist: Peter Koves
by artist: Janusz Monarcha
by artist: Renato Girolami
by artist: Nicolaus Esterhazy Sinfonia
by artist: Michael Halasz
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additional property: OTSVerifyInstructions
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additional property: ProofProfileEvidenceStatus
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  date published: 2026-07-08T08:56:20Z
audio: Le nozze di Figaro, K. 492: Act I No. 1: Duettino - Cinque...dieci...venti...trenta
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Le nozze di Figaro, K. 492: Act I No. 6: Aria - Non so piu cosa son faccio
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by artist: Marina Mescheriakova
by artist: Judith Halász
by artist: Michelle Breedt
by artist: Orsolya Safar
by artist: Gabriele Sima
by artist: Alexander Klinger
by artist: Michael Roider
by artist: Bo Skovhus
by artist: Peter Koves
by artist: Janusz Monarcha
by artist: Renato Girolami
by artist: Nicolaus Esterhazy Sinfonia
by artist: Michael Halasz
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additional property: OTSVerifyInstructions
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additional property: ProofProfileEvidenceStatus
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  date published: 2026-07-08T03:53:27Z
audio: Le nozze di Figaro, K. 492: Act I No. 6: Aria - Non so piu cosa son faccio
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Le nozze di Figaro, K. 492: Act II No. 12: Arietta - Voi, che sapete
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by artist: Judith Halász
by artist: Michelle Breedt
by artist: Orsolya Safar
by artist: Gabriele Sima
by artist: Alexander Klinger
by artist: Michael Roider
by artist: Bo Skovhus
by artist: Peter Koves
by artist: Janusz Monarcha
by artist: Renato Girolami
by artist: Nicolaus Esterhazy Sinfonia
by artist: Michael Halasz
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  date published: 2026-07-08T03:53:27Z
audio: Le nozze di Figaro, K. 492: Act II No. 12: Arietta - Voi, che sapete
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  additional property: Tempo (BPM)
    type: PropertyValue
    value: 129.925
  additional property: Musical Key
    type: PropertyValue
    value: 10
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.322
  additional property: Energy
    type: PropertyValue
    value: 0.081
  additional property: Speechiness
    type: PropertyValue
    value: 0.052
  additional property: Acousticness
    type: PropertyValue
    value: 0.991
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.002
  additional property: Liveness
    type: PropertyValue
    value: 0.175
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.095
  additional property: Loudness (dB)
    type: PropertyValue
    value: -23.31
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Major