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description: thumb|Nicola Zaccaria in Rigoletto, Teatro alla Scala, Milan, lyric season 1933-1934 (photo with 1953 dedication) Nicola Zaccaria (9 March 1923 – 24 July 2007), born Nicholas Angelos Zachariou was a G
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album: Puccini: Turandot (Recorded 1955)
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album: Puccini: Turandot (Recorded Live 1961)
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album: Pelléas et Mélisande live 1962 Herbert von Karajan
  type: MusicAlbum
  date published: 2022-01-07
album: Pavarotti – The Opera Collection 1: Bellini: I Capuleti e I Montecchi (Live in Amsterdam, 1966)
  type: MusicAlbum
  date published: 2010
album: Bellini: La Sonnambula
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  date published: 2000-01-01
track: Verdi: La Traviata: Un di, felice, eterea - Act One
track: Verdi: Un ballo in maschera, Act 1: "Volta la terrea" (Oscar, Riccardo, Giudice, Renato, Samuel, Tom, Coro)
track: Verdi: Un ballo in maschera, Act 1: "Ogni cura si doni al diletto" (Riccardo, Renato, Oscar, Samuel, Tom, Coro)
track: Norma, Act II Scene 3: Qual cor tradisti, qual cor perdesti (Coro/Norma/Pollione/Oroveso)
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track: Turandot / Act 1: Non piangere Liù
track: Verdi: La Traviata: Prelude - Act One
track: Verdi: Un ballo in maschera, Act 1: "Posa in pace, a’ bei sogni ristora" (Coro, Samuel, Tom)
track: Verdi: Un ballo in maschera, Act 1: "La rivedrà nell’estasi" (Riccardo, Oscar, Coro, Samuel, Tom)
track: Verdi: La Traviata: Libiamo ne'lieti calici - Act One
track: Verdi: Un ballo in maschera, Act 1: "È scherzo od è follia" (Riccardo, Ulrica, Samuel, Tom, Oscar, Coro)
track: Verdi: Un ballo in maschera, Act 1: "Finisci il vaticinio" (Riccardo, Ulrica, Coro, Samuel, Tom, Silvano, Oscar, Renato)
track: Verdi: Un ballo in maschera, Act 2: "Seguitemi" (Renato, Amelia, Coro, Samuel, Tom)
track: Verdi: Un ballo in maschera, Act 2: "Ve', se di notte qui colla sposa" (Renato, Amelia, Coro, Samuel, Tom)

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audio: Verdi: La Traviata: Un di, felice, eterea - Act One
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Verdi: Un ballo in maschera, Act 1: "Volta la terrea" (Oscar, Riccardo, Giudice, Renato, Samuel, Tom, Coro)
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  date published: 2026-07-08T03:20:19Z
audio: Verdi: Un ballo in maschera, Act 1: "Volta la terrea" (Oscar, Riccardo, Giudice, Renato, Samuel, Tom, Coro)
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Verdi: Un ballo in maschera, Act 1: "Ogni cura si doni al diletto" (Riccardo, Renato, Oscar, Samuel, Tom, Coro)
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audio: Verdi: Un ballo in maschera, Act 1: "Ogni cura si doni al diletto" (Riccardo, Renato, Oscar, Samuel, Tom, Coro)
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Turandot / Act 1: Non piangere Liù
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audio: Turandot / Act 1: Non piangere Liù
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Verdi: La Traviata: Prelude - Act One
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audio: Verdi: La Traviata: Prelude - Act One
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Verdi: Un ballo in maschera, Act 1: "Posa in pace, a’ bei sogni ristora" (Coro, Samuel, Tom)
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  date published: 2026-07-30T22:27:30Z
audio: Verdi: Un ballo in maschera, Act 1: "Posa in pace, a’ bei sogni ristora" (Coro, Samuel, Tom)
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Verdi: Un ballo in maschera, Act 1: "La rivedrà nell’estasi" (Riccardo, Oscar, Coro, Samuel, Tom)
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  date published: 2026-07-31T00:26:26Z
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Verdi: La Traviata: Libiamo ne'lieti calici - Act One
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by artist: Alfredo Giacomotti
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by artist: Limbania Leoni
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by artist: Herbert von Karajan
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popularity: 2
genre: classical
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  date published: 2026-07-30T14:36:16Z
audio: Verdi: La Traviata: Libiamo ne'lieti calici - Act One
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Verdi: Un ballo in maschera, Act 1: "È scherzo od è follia" (Riccardo, Ulrica, Samuel, Tom, Oscar, Coro)
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popularity: 2
genre: classical
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  date published: 2026-07-30T08:30:10Z
audio: Verdi: Un ballo in maschera, Act 1: "È scherzo od è follia" (Riccardo, Ulrica, Samuel, Tom, Oscar, Coro)
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Verdi: Un ballo in maschera, Act 1: "Finisci il vaticinio" (Riccardo, Ulrica, Coro, Samuel, Tom, Silvano, Oscar, Renato)
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popularity: 2
genre: classical
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  date published: 2026-07-30T21:00:46Z
audio: Verdi: Un ballo in maschera, Act 1: "Finisci il vaticinio" (Riccardo, Ulrica, Coro, Samuel, Tom, Silvano, Oscar, Renato)
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  type: PropertyValue
  value: 2026-07-30T21:00:46+00:00
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 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

Verdi: Un ballo in maschera, Act 2: "Seguitemi" (Renato, Amelia, Coro, Samuel, Tom)
type: MusicRecording
duration: PT2M38S
duration ms: 158666
explicit: false
by artist: Giuseppe Verdi
by artist: Maria Callas
by artist: Coro Del Teatro Alla Scala Di Milano
by artist: Nicola Zaccaria
by artist: Silvio Maionica
by artist: Tito Gobbi
by artist: Antonino Votto
by artist: Orchestra Del Teatro Alla Scala, Milano
in album: Verdi: Un ballo in maschera
  type: MusicAlbum
  date published: 2022-12-02
popularity: 2
genre: classical
genre: opera
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38904f0fd443a1a58ce54189157af12dacc7410ab972e82ed7f8c9872f2dad7. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1401221.
  date published: 2026-07-30T20:09:33Z
audio: Verdi: Un ballo in maschera, Act 2: "Seguitemi" (Renato, Amelia, Coro, Samuel, Tom)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 100.506
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.422
  additional property: Energy
    type: PropertyValue
    value: 0.099
  additional property: Speechiness
    type: PropertyValue
    value: 0.07
  additional property: Acousticness
    type: PropertyValue
    value: 0.987
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.216
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.151
  additional property: Loudness (dB)
    type: PropertyValue
    value: -20.729
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: GBAYC1401221
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960302
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-30T20:09:33+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1401221
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960302
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960302
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T20:09:33+00:00
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 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

Verdi: Un ballo in maschera, Act 2: "Ve', se di notte qui colla sposa" (Renato, Amelia, Coro, Samuel, Tom)
type: MusicRecording
duration: PT5M7S
duration ms: 307453
explicit: false
by artist: Giuseppe Verdi
by artist: Maria Callas
by artist: Coro Del Teatro Alla Scala Di Milano
by artist: Nicola Zaccaria
by artist: Silvio Maionica
by artist: Tito Gobbi
by artist: Antonino Votto
by artist: Orchestra Del Teatro Alla Scala, Milano
in album: Verdi: Un ballo in maschera
  type: MusicAlbum
  date published: 2022-12-02
popularity: 2
genre: classical
genre: opera
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7be3b7147989c2dc3ba99833827712a0cdf487339f67b10c58977732169ba2. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1401222.
  date published: 2026-07-31T22:27:44Z
audio: Verdi: Un ballo in maschera, Act 2: "Ve', se di notte qui colla sposa" (Renato, Amelia, Coro, Samuel, Tom)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 151.825
  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: 0.47
  additional property: Energy
    type: PropertyValue
    value: 0.187
  additional property: Speechiness
    type: PropertyValue
    value: 0.08
  additional property: Acousticness
    type: PropertyValue
    value: 0.98
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.006
  additional property: Liveness
    type: PropertyValue
    value: 0.157
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.309
  additional property: Loudness (dB)
    type: PropertyValue
    value: -18.218
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: GBAYC1401222
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960473
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-31T22:27:44+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1401222
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960473
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960473
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T22:27:44+00:00
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 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