Cesare Siepi
type: MusicGroup
genre: classical
genre: opera
description: thumb|Siepi in the 1950s Cesare Siepi (10 February 19235 July 2010) was an Italian operatic bass, generally considered to have been one of the finest basses of the post-war period. His voice was chara
popularity: 22
followers: 4031
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subject of: OpenTimestamps Proof of Existence
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album: Le nozze di Figaro / The Marriage of Figaro
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  date published: 2023-03-03
  track: Le nozze di Figaro / The Marriage of Figaro: Ouverture
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    by artist: Erich Kleiber
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      date published: 2023-03-03
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    genre: classical-era
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    genre: opera
    genre: chamber-music
    genre: concerto
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-06-13T13:32:09Z
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  track: Le nozze di Figaro / The Marriage of Figaro: Duettino: Cinque ... Dieci ... Venti ... Trenta …Cosa stai misurando
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-30T16:10:47Z
    audio: Le nozze di Figaro / The Marriage of Figaro: Duettino: Cinque ... Dieci ... Venti ... Trenta …Cosa stai misurando
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  track: Le nozze di Figaro / The Marriage of Figaro: Duettino: Se a caso Madama la notte ti chiama …Or bene, ascolta
  track: Le nozze di Figaro / The Marriage of Figaro: Bravo, Signor Padrone … Cavatina. Se vuol ballare … Ed aspettaste
  track: Le nozze di Figaro / The Marriage of Figaro: Aria. La vendetta …Tutto ancor non ho perso
  track: Le nozze di Figaro / The Marriage of Figaro: Duettino: Via, resti servita … Va là, vecchia pedante
  track: Le nozze di Figaro / The Marriage of Figaro: Aria. Non so più … Ah, son perduto!
  track: Le nozze di Figaro / The Marriage of Figaro: Terzetto. Cosa sento! ... Murray Dickie (tenor), in traccia tosto… Giovani liete…Evviva!
  track: Le nozze di Figaro / The Marriage of Figaro: Aria. Non più andrai
  track: Le nozze di Figaro / The Marriage of Figaro: Cavatina; Porgi amor … Vieni, cara Susanna
  track: Le nozze di Figaro / The Marriage of Figaro: Arietta. Voi che sapete … Bravo, che bella voce!
  track: Le nozze di Figaro / The Marriage of Figaro: Signori, di fuori … Ah! Signor ... Signor!
  track: Le nozze di Figaro / The Marriage of Figaro: Sestetto: Riconosci in questo amplesso …. Eccovi, o caro amico...Andiamo, andiam, bel paggio
  track: Le nozze di Figaro / The Marriage of Figaro: Recitativo ed Aria Tutto è disposto
album: Il dissoluto punito ossia Il Don Giovanni
album: Verdi: Requiem
album: Verdi: Don Carlos (Recorded 1956) [Live]
album: Puccini: La bohème & Highlights from Tosca (Live)
album: La Gioconda
album: Highlights From Don Giovanni
album: Verdi: La forza del destino [Recorded 1956]
album: Rigoletto
album: Mozart: Don Giovanni, K. 527 (Live)
album: Ponchielli: La Gioconda, Op. 9 (Live)
album: Gounod: Faust (Live Recordings 1959)
album: Gounod: Faust (Bjorling, Siepi, Kirsten) (1950)
album: Verdi: Rigoletto
album: Mozart: Le nozze di Figaro, K. 492 (Live)
album: Mozart: Requiem in D Minor, K. 626 (Remastered 2020)
album: The 1956 Salzburg Recital (Live)
album: Verdi: Don Carlo (Recorded Live 1950)
album: Schumann & Brahms: Lieder - Ravel: Don Quichotte à Dulcinée, M. 84 (Live)
album: Boito: Mefistofele
album: Musical Moments to Remember: Wunderbar – Essential Songs of Cole Porter & Vincent Youmans
album: Mozart: Le nozze di Figaro, K. 492
album: Mozart: Don Giovanni, K. 527
album: Singer Portrait: Cesare Siepi
album: Recital (1951-1957)
album: Il mito dell'opera: Cesare Siepi (Live)
album: The Romantic Voice Of Cesare Siepi: Songs Of Italy
album: Easy To Love - Songs Of Cole Porter
album: Performs Cole Porter
album: Porter, Tosti & Others: Songs
album: Bravo Giovani (original Broadway Cast Recording)
album: The Artistry of Cesare Siepi
album: Cesare Siepi
album: Lebendige Vergangenheit - Cesare Siepi III
album: Don Giovanni
album: Rossini: Il Barbiere Di Siviglia
album: Mozart: Don Giovanni
album: Cesare Siepi (Recorded 1947/8)
album: Lebendige Vergangenheit - Cesare Siepi (Vol.2)
album: Lebendige Vergangenheit - Cesare Siepi
album: Rossini: The Barber Of Seville
track: Mefistofele, Prologue: Ave, signor, perdona se il mio gergo
track: Mefistofele, Prologue: T'è noto Faust?
track: Mefistofele, Act I: Son lo spirito che nega
track: Mefistofele, Epilogue: Ave signor, signor degli angeli

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Le nozze di Figaro / The Marriage of Figaro: Duettino: Se a caso Madama la notte ti chiama …Or bene, ascolta
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by artist: Vienna State Opera Chorus
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by artist: Cesare Siepi
by artist: Hilde Gueden
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  date published: 2023-03-03
popularity: 3
genre: classical
genre: classical-era
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genre: opera
genre: chamber-music
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Le nozze di Figaro / The Marriage of Figaro: Bravo, Signor Padrone … Cavatina. Se vuol ballare … Ed aspettaste
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T02:19:15Z
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD62142105
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:22:41Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7668a3cd70cdd1c228fd9c93e1d76b013841448adf6e071baaaba40f7c82fd41. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEAD62142105.
  date published: 2026-07-08T03:22:41Z
audio: Le nozze di Figaro / The Marriage of Figaro: Aria. La vendetta …Tutto ancor non ho perso
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 101.937
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.364
  additional property: Energy
    type: PropertyValue
    value: 0.209
  additional property: Speechiness
    type: PropertyValue
    value: 0.078
  additional property: Acousticness
    type: PropertyValue
    value: 0.89
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.653
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.257
  additional property: Loudness (dB)
    type: PropertyValue
    value: -19.517
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Major

Le nozze di Figaro / The Marriage of Figaro: Duettino: Via, resti servita … Va là, vecchia pedante
type: MusicRecording
duration: PT4M11S
duration ms: 251666
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Wiener Philharmoniker
by artist: Vienna State Opera Chorus
by artist: Erich Kleiber
by artist: Hilde Rössel Majdan
by artist: Hilde Gueden
by artist: Suzanne Danco
in album: Le nozze di Figaro / The Marriage of Figaro
  type: MusicAlbum
  date published: 2023-03-03
popularity: 3
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: DEAD62142106
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T19:33:17+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x306df10d0a580cef39987e234dbb1d3f06f933dd29ea7df8ac52ecb493c4bc42
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960455
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960455
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD62142106
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T19:53:13Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306df10d0a580cef39987e234dbb1d3f06f933dd29ea7df8ac52ecb493c4bc42. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEAD62142106.
  date published: 2026-07-31T19:53:13Z
audio: Le nozze di Figaro / The Marriage of Figaro: Duettino: Via, resti servita … Va là, vecchia pedante
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 131.371
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 6
  additional property: Danceability
    type: PropertyValue
    value: 0.494
  additional property: Energy
    type: PropertyValue
    value: 0.154
  additional property: Speechiness
    type: PropertyValue
    value: 0.065
  additional property: Acousticness
    type: PropertyValue
    value: 0.895
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.168
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.363
  additional property: Loudness (dB)
    type: PropertyValue
    value: -21.433
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Major

Le nozze di Figaro / The Marriage of Figaro: Aria. Non so più … Ah, son perduto!
type: MusicRecording
duration: PT5M54S
duration ms: 354453
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Wiener Philharmoniker
by artist: Vienna State Opera Chorus
by artist: Erich Kleiber
by artist: Suzanne Danco
by artist: Hilde Gueden
by artist: Alfred Poell
by artist: Murray Dickie
in album: Le nozze di Figaro / The Marriage of Figaro
  type: MusicAlbum
  date published: 2023-03-03
popularity: 3
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: DEAD62142107
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T14:01:35+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8e8712ed6a1c417e4024c7a24623aa7617744b4ab1da02fd0120f32f9a78ebe7
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960418
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960418
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD62142107
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T15:20:15Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8712ed6a1c417e4024c7a24623aa7617744b4ab1da02fd0120f32f9a78ebe7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEAD62142107.
  date published: 2026-07-31T15:20:15Z
audio: Le nozze di Figaro / The Marriage of Figaro: Aria. Non so più … Ah, son perduto!
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 110.926
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.475
  additional property: Energy
    type: PropertyValue
    value: 0.18
  additional property: Speechiness
    type: PropertyValue
    value: 0.216
  additional property: Acousticness
    type: PropertyValue
    value: 0.905
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.119
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.285
  additional property: Loudness (dB)
    type: PropertyValue
    value: -21.48
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Major

Le nozze di Figaro / The Marriage of Figaro: Terzetto. Cosa sento! ... Murray Dickie (tenor), in traccia tosto… Giovani liete…Evviva!
type: MusicRecording
duration: PT10M32S
duration ms: 632160
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Wiener Philharmoniker
by artist: Vienna State Opera Chorus
by artist: Erich Kleiber
by artist: Hilde Gueden
by artist: Alfred Poell
by artist: Murray Dickie
by artist: Suzanne Danco
by artist: Cesare Siepi
in album: Le nozze di Figaro / The Marriage of Figaro
  type: MusicAlbum
  date published: 2023-03-03
popularity: 2
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: DEAD62142108
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T08:01:01+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdc5dab97d9e7c04cac8b3222e9be24f61280c138d51fb34603e00e4c9380d5ae
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960368
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960368
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD62142108
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T08:26:41Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5dab97d9e7c04cac8b3222e9be24f61280c138d51fb34603e00e4c9380d5ae. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEAD62142108.
  date published: 2026-07-31T08:26:41Z
audio: Le nozze di Figaro / The Marriage of Figaro: Terzetto. Cosa sento! ... Murray Dickie (tenor), in traccia tosto… Giovani liete…Evviva!
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 111.524
  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: 0.44
  additional property: Energy
    type: PropertyValue
    value: 0.167
  additional property: Speechiness
    type: PropertyValue
    value: 0.079
  additional property: Acousticness
    type: PropertyValue
    value: 0.895
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.181
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.315
  additional property: Loudness (dB)
    type: PropertyValue
    value: -20.793
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Le nozze di Figaro / The Marriage of Figaro: Aria. Non più andrai
type: MusicRecording
duration: PT3M51S
duration ms: 231160
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Wiener Philharmoniker
by artist: Vienna State Opera Chorus
by artist: Erich Kleiber
by artist: Cesare Siepi
in album: Le nozze di Figaro / The Marriage of Figaro
  type: MusicAlbum
  date published: 2023-03-03
popularity: 3
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: DEAD62142109
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T08:11:02+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x46a366d35e141225d4c3238503f79a8765fa912c3c6ad158afbf5d6bd802e2ae
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957118
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD62142109
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a366d35e141225d4c3238503f79a8765fa912c3c6ad158afbf5d6bd802e2ae. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEAD62142109.
  date published: 2026-07-08T03:20:19Z
audio: Le nozze di Figaro / The Marriage of Figaro: Aria. Non più andrai
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 136.72
  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: 0.563
  additional property: Energy
    type: PropertyValue
    value: 0.302
  additional property: Speechiness
    type: PropertyValue
    value: 0.041
  additional property: Acousticness
    type: PropertyValue
    value: 0.766
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.009
  additional property: Liveness
    type: PropertyValue
    value: 0.153
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.351
  additional property: Loudness (dB)
    type: PropertyValue
    value: -17.656
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Major

Le nozze di Figaro / The Marriage of Figaro: Cavatina; Porgi amor … Vieni, cara Susanna
type: MusicRecording
duration: PT8M10S
duration ms: 490333
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Wiener Philharmoniker
by artist: Vienna State Opera Chorus
by artist: Erich Kleiber
by artist: Lisa della Casa
by artist: Hilde Gueden
by artist: Cesare Siepi
by artist: Suzanne Danco
in album: Le nozze di Figaro / The Marriage of Figaro
  type: MusicAlbum
  date published: 2023-03-03
popularity: 2
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: DEAD62142110
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T17:23:34+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9648717c820dc88ee8de4f2b435708c0125c51d95f7c8322659c11e17e7b44f0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957118
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD62142110
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9648717c820dc88ee8de4f2b435708c0125c51d95f7c8322659c11e17e7b44f0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEAD62142110.
  date published: 2026-07-08T03:20:19Z
audio: Le nozze di Figaro / The Marriage of Figaro: Cavatina; Porgi amor … Vieni, cara Susanna
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 106.444
  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: 0.415
  additional property: Energy
    type: PropertyValue
    value: 0.128
  additional property: Speechiness
    type: PropertyValue
    value: 0.152
  additional property: Acousticness
    type: PropertyValue
    value: 0.912
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.155
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.211
  additional property: Loudness (dB)
    type: PropertyValue
    value: -22.98
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Le nozze di Figaro / The Marriage of Figaro: Arietta. Voi che sapete … Bravo, che bella voce!
type: MusicRecording
duration: PT3M50S
duration ms: 230573
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Wiener Philharmoniker
by artist: Vienna State Opera Chorus
by artist: Erich Kleiber
by artist: Suzanne Danco
by artist: Lisa della Casa
by artist: Hilde Gueden
in album: Le nozze di Figaro / The Marriage of Figaro
  type: MusicAlbum
  date published: 2023-03-03
popularity: 3
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: DEAD62142111
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T10:33:32+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdf96faaf3720daf0eaadc99af218dea5c70d2b3797ffd04eef77a4896f11ca84
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960397
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960397
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD62142111
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T12:24:41Z
additional property: OTSVerifyInstructions
  type: PropertyValue
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subject of: OpenTimestamps Proof of Existence
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Le nozze di Figaro / The Marriage of Figaro: Signori, di fuori … Ah! Signor ... Signor!
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Le nozze di Figaro / The Marriage of Figaro: Sestetto: Riconosci in questo amplesso …. Eccovi, o caro amico...Andiamo, andiam, bel paggio
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T19:53:13Z
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Le nozze di Figaro / The Marriage of Figaro: Recitativo ed Aria Tutto è disposto
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Il dissoluto punito ossia Il Don Giovanni
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Verdi: Requiem
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Verdi: Don Carlos (Recorded 1956) [Live]
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Puccini: La bohème & Highlights from Tosca (Live)
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La Gioconda
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Highlights From Don Giovanni
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Verdi: La forza del destino [Recorded 1956]
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Rigoletto
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Mozart: Don Giovanni, K. 527 (Live)
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Ponchielli: La Gioconda, Op. 9 (Live)
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Gounod: Faust (Live Recordings 1959)
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Gounod: Faust (Bjorling, Siepi, Kirsten) (1950)
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    date published: 2026-07-08T03:22:41Z
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Mozart: Le nozze di Figaro, K. 492 (Live)
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Mozart: Requiem in D Minor, K. 626 (Remastered 2020)
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The 1956 Salzburg Recital (Live)
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Schumann & Brahms: Lieder - Ravel: Don Quichotte à Dulcinée, M. 84 (Live)
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Boito: Mefistofele
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Musical Moments to Remember: Wunderbar – Essential Songs of Cole Porter & Vincent Youmans
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Mozart: Le nozze di Figaro, K. 492
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Mozart: Don Giovanni, K. 527
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Singer Portrait: Cesare Siepi
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Recital (1951-1957)
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Il mito dell'opera: Cesare Siepi (Live)
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The Romantic Voice Of Cesare Siepi: Songs Of Italy
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Easy To Love - Songs Of Cole Porter
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Performs Cole Porter
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Porter, Tosti & Others: Songs
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Bravo Giovani (original Broadway Cast Recording)
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  by artist: George S. Irving
  in album: Bravo Giovani (original Broadway Cast Recording)
    type: MusicAlbum
    date published: 2010-10-21
  isrc code: USX7N1015262
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-30T08:46:46+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x46f749db2bc3777bbe7a5c316910eb031205f159a8b26fb7c6a8e1eeb74ee69d
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960236
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960236
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX7N1015262
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-30T09:37:10Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f749db2bc3777bbe7a5c316910eb031205f159a8b26fb7c6a8e1eeb74ee69d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USX7N1015262.
    date published: 2026-07-30T09:37:10Z
  audio: Uriti
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 113.313
    additional property: Musical Key
      type: PropertyValue
      value: 1
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.608
    additional property: Energy
      type: PropertyValue
      value: 0.886
    additional property: Speechiness
      type: PropertyValue
      value: 0.047
    additional property: Acousticness
      type: PropertyValue
      value: 0.334
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.188
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.972
    additional property: Loudness (dB)
      type: PropertyValue
      value: -9.799
    additional property: Key Name
      type: PropertyValue
      value: C#
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: If I Were The Man
  type: MusicRecording
  duration: PT2M4S
  duration ms: 124666
  explicit: false
  by artist: Cesare Siepi
  in album: Bravo Giovani (original Broadway Cast Recording)
    type: MusicAlbum
    date published: 2010-10-21
  genre: classical
  genre: opera
  isrc code: USX7N1015267
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-30T16:45:25+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xbdb9e599997cf81884023ed8e7372d238fccb3b73951b69166c0c01b51799db1
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960284
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960284
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: If I Were The Man
track: Ah! Camminare

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX7N1015267

OTSTimestamp
type: PropertyValue
value: 2026-07-30T17:23:26Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb9e599997cf81884023ed8e7372d238fccb3b73951b69166c0c01b51799db1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USX7N1015267.
date published: 2026-07-30T17:23:26Z

If I Were The Man
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 116.813
additional property: Musical Key
  type: PropertyValue
  value: 5
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 0
additional property: Time Signature
  type: PropertyValue
  value: 5
additional property: Danceability
  type: PropertyValue
  value: 0.553
additional property: Energy
  type: PropertyValue
  value: 0.93
additional property: Speechiness
  type: PropertyValue
  value: 0.09
additional property: Acousticness
  type: PropertyValue
  value: 0.386
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.082
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.961
additional property: Loudness (dB)
  type: PropertyValue
  value: -8.789
additional property: Key Name
  type: PropertyValue
  value: F
additional property: Mode Name
  type: PropertyValue
  value: Minor

Ah! Camminare
type: MusicRecording
duration: PT2M6S
duration ms: 126160
explicit: false
by artist: Gene Varrone
in album: Bravo Giovani (original Broadway Cast Recording)
  type: MusicAlbum
  date published: 2010-10-21
isrc code: USX7N1015270
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T10:38:24+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xfd5320eb11c40b938f844b0c45b6ae549208a532e4b1e820f0ffaeb9ae5a7d19
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960397
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960397
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX7N1015270
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T12:24:41Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5320eb11c40b938f844b0c45b6ae549208a532e4b1e820f0ffaeb9ae5a7d19. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USX7N1015270.
  date published: 2026-07-31T12:24:41Z
audio: Ah! Camminare
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 118.531
  additional property: Musical Key
    type: PropertyValue
    value: 1
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.585
  additional property: Energy
    type: PropertyValue
    value: 0.881
  additional property: Speechiness
    type: PropertyValue
    value: 0.186
  additional property: Acousticness
    type: PropertyValue
    value: 0.312
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.249
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.802
  additional property: Loudness (dB)
    type: PropertyValue
    value: -9.684
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Major

The Artistry of Cesare Siepi
type: MusicAlbum
date published: 2010-09-30

Cesare Siepi
type: MusicAlbum
date published: 2010-09-30

Lebendige Vergangenheit - Cesare Siepi III
type: MusicAlbum
date published: 2010-08-05

Don Giovanni
type: MusicAlbum
date published: 2008-12-01

Rossini: Il Barbiere Di Siviglia
type: MusicAlbum
date published: 2006-01-01

Mozart: Don Giovanni
type: MusicAlbum
date published: 2000-01-01

Cesare Siepi (Recorded 1947/8)
type: MusicAlbum
date published: 2007-01-01

Lebendige Vergangenheit - Cesare Siepi (Vol.2)
type: MusicAlbum
date published: 2006-08-14
track: Vi ravviso, o luoghi ameni (La Sonnambula)
  type: MusicRecording
  duration: PT5M22S
  duration ms: 322066
  explicit: false
  by artist: Cesare Siepi
  by artist: Ferruccio Tagliavini
  by artist: Orchestra of Radio Italiana, Milan
  in album: Lebendige Vergangenheit - Cesare Siepi (Vol.2)
    type: MusicAlbum
    date published: 2006-08-14
  genre: classical
  genre: opera
  isrc code: ATP130664201
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-07T05:48:01+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xa46fa847211a4700ada216132fa455117e6ca977c194c26b4024517aa05319df
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957118
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957118
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATP130664201
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T03:20:19Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46fa847211a4700ada216132fa455117e6ca977c194c26b4024517aa05319df. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATP130664201.
    date published: 2026-07-08T03:20:19Z
  audio: Vi ravviso, o luoghi ameni (La Sonnambula)
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 111.967
    additional property: Musical Key
      type: PropertyValue
      value: 8
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.247
    additional property: Energy
      type: PropertyValue
      value: 0.314
    additional property: Speechiness
      type: PropertyValue
      value: 0.066
    additional property: Acousticness
      type: PropertyValue
      value: 0.988
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.107
    additional property: Liveness
      type: PropertyValue
      value: 0.097
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.185
    additional property: Loudness (dB)
      type: PropertyValue
      value: -17.203
    additional property: Key Name
      type: PropertyValue
      value: Ab
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Seigneur, rempart et seul soutien (Les Huguenots)
  type: MusicRecording
  duration: PT2M33S
  duration ms: 153466
  explicit: false
  by artist: Cesare Siepi
  by artist: Orchestra of the Accademia di Santa Celilia
  in album: Lebendige Vergangenheit - Cesare Siepi (Vol.2)
    type: MusicAlbum
    date published: 2006-08-14
  genre: classical
  genre: opera
  isrc code: ATP130664203
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-31T15:00:52+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x0e9b027935836b144e3cb5c0c206c1e3d02a6e43c38dba917226ef52d541b104
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960418
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960418
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATP130664203
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-31T15:20:15Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9b027935836b144e3cb5c0c206c1e3d02a6e43c38dba917226ef52d541b104. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ATP130664203.
    date published: 2026-07-31T15:20:15Z
  audio: Seigneur, rempart et seul soutien (Les Huguenots)
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 114.304
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.249
    additional property: Energy
      type: PropertyValue
      value: 0.135
    additional property: Speechiness
      type: PropertyValue
      value: 0.034
    additional property: Acousticness
      type: PropertyValue
      value: 0.988
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.001
    additional property: Liveness
      type: PropertyValue
      value: 0.15
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.276
    additional property: Loudness (dB)
      type: PropertyValue
      value: -16.287
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Si la rigueur (La Juive)
  type: MusicRecording
  duration: PT4M0S
  duration ms: 240600
  explicit: false
  by artist: Cesare Siepi
  by artist: Orchestra of the Accademia di Santa Celilia
  in album: Lebendige Vergangenheit - Cesare Siepi (Vol.2)
    type: MusicAlbum
    date published: 2006-08-14
  genre: classical
  genre: opera
  isrc code: ATP130664205
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-30T17:42:47+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x800ae9fd7ae6d38ef86c4dee38c61402f4d88e73693decb0807a4a4a8ec81ae9
  additional property: OTSHash
  additional property: OTSBitcoinBlock
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Si la rigueur (La Juive)
track: Il lacerato spirito (Simon Boccanegra)
track: Ella giammai m´amò (Don Carlo)
track: Di sposo, di padre le gioie serene (Salvator Rosa)
track: Vecchia zimarra, senti (La Bohème)
track: Le veau d´or (Faust)
track: Vous qui faites l´endormie (Faust)

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 960291

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/960291

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATP130664205

OTSTimestamp
type: PropertyValue
value: 2026-07-30T18:23:33Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800ae9fd7ae6d38ef86c4dee38c61402f4d88e73693decb0807a4a4a8ec81ae9. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ATP130664205.
date published: 2026-07-30T18:23:33Z

Si la rigueur (La Juive)
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 101.128
additional property: Musical Key
  type: PropertyValue
  value: 5
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 5
additional property: Danceability
  type: PropertyValue
  value: 0.173
additional property: Energy
  type: PropertyValue
  value: 0.267
additional property: Speechiness
  type: PropertyValue
  value: 0.051
additional property: Acousticness
  type: PropertyValue
  value: 0.991
additional property: Instrumentalness
  type: PropertyValue
  value: 0.002
additional property: Liveness
  type: PropertyValue
  value: 0.1
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.091
additional property: Loudness (dB)
  type: PropertyValue
  value: -20.301
additional property: Key Name
  type: PropertyValue
  value: F
additional property: Mode Name
  type: PropertyValue
  value: Major

Il lacerato spirito (Simon Boccanegra)
type: MusicRecording
duration: PT4M25S
duration ms: 265866
explicit: false
by artist: Cesare Siepi
by artist: Orchestra of the Accademia di Santa Celilia
in album: Lebendige Vergangenheit - Cesare Siepi (Vol.2)
  type: MusicAlbum
  date published: 2006-08-14
genre: classical
genre: opera
isrc code: ATP130664208
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-30T07:28:55+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb27b7203cfef3121390a1d3f7309c1af3f5038f2720510eea87ff32f616d54d2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960222
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960222
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATP130664208
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T07:48:45Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27b7203cfef3121390a1d3f7309c1af3f5038f2720510eea87ff32f616d54d2. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/ATP130664208.
  date published: 2026-07-30T07:48:45Z
audio: Il lacerato spirito (Simon Boccanegra)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 99.874
  additional property: Musical Key
    type: PropertyValue
    value: 11
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.182
  additional property: Energy
    type: PropertyValue
    value: 0.154
  additional property: Speechiness
    type: PropertyValue
    value: 0.045
  additional property: Acousticness
    type: PropertyValue
    value: 0.992
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.169
  additional property: Liveness
    type: PropertyValue
    value: 0.131
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.04
  additional property: Loudness (dB)
    type: PropertyValue
    value: -19.913
  additional property: Key Name
    type: PropertyValue
    value: B
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Ella giammai m´amò (Don Carlo)
type: MusicRecording
duration: PT9M36S
duration ms: 576240
explicit: false
by artist: Cesare Siepi
by artist: Orchestra of the Accademia di Santa Celilia
in album: Lebendige Vergangenheit - Cesare Siepi (Vol.2)
  type: MusicAlbum
  date published: 2006-08-14
genre: classical
genre: opera
isrc code: ATP130664209
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-30T12:42:05+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2ec132d48a8a40dbf97110690f1bbfb5aa4407b0db4fa472abf792ff5b5b44b9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960259
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960259
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATP130664209
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T12:51:24Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec132d48a8a40dbf97110690f1bbfb5aa4407b0db4fa472abf792ff5b5b44b9. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/ATP130664209.
  date published: 2026-07-30T12:51:24Z
audio: Ella giammai m´amò (Don Carlo)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 105.854
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.149
  additional property: Energy
    type: PropertyValue
    value: 0.163
  additional property: Speechiness
    type: PropertyValue
    value: 0.045
  additional property: Acousticness
    type: PropertyValue
    value: 0.979
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.205
  additional property: Liveness
    type: PropertyValue
    value: 0.106
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.047
  additional property: Loudness (dB)
    type: PropertyValue
    value: -20.125
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Di sposo, di padre le gioie serene (Salvator Rosa)
type: MusicRecording
duration: PT6M0S
duration ms: 360266
explicit: false
by artist: Cesare Siepi
by artist: Orchestra of the Accademia di Santa Celilia
in album: Lebendige Vergangenheit - Cesare Siepi (Vol.2)
  type: MusicAlbum
  date published: 2006-08-14
genre: classical
genre: opera
isrc code: ATP130664210
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-08-01T00:33:06+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6525ecbb502ae4e1bc4be731095d464da6eb9d1f993efdcf3a094ca4a8e547ba
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960494
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960494
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATP130664210
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-08-01T01:44:32Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6525ecbb502ae4e1bc4be731095d464da6eb9d1f993efdcf3a094ca4a8e547ba. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ATP130664210.
  date published: 2026-08-01T01:44:32Z
audio: Di sposo, di padre le gioie serene (Salvator Rosa)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 98.122
  additional property: Musical Key
    type: PropertyValue
    value: 11
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.208
  additional property: Energy
    type: PropertyValue
    value: 0.195
  additional property: Speechiness
    type: PropertyValue
    value: 0.045
  additional property: Acousticness
    type: PropertyValue
    value: 0.983
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.004
  additional property: Liveness
    type: PropertyValue
    value: 0.151
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.061
  additional property: Loudness (dB)
    type: PropertyValue
    value: -18.479
  additional property: Key Name
    type: PropertyValue
    value: B
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Vecchia zimarra, senti (La Bohème)
type: MusicRecording
duration: PT1M44S
duration ms: 104626
explicit: false
by artist: Cesare Siepi
by artist: Orchestra of Radio Italiana, Milan
in album: Lebendige Vergangenheit - Cesare Siepi (Vol.2)
  type: MusicAlbum
  date published: 2006-08-14
genre: classical
genre: opera
isrc code: ATP130664211
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T08:28:25+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3552e8c81bee925b751e20e9c3815914a714b69554f3ba14f68abeeac21efc3d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957118
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATP130664211
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3552e8c81bee925b751e20e9c3815914a714b69554f3ba14f68abeeac21efc3d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATP130664211.
  date published: 2026-07-08T03:20:19Z
audio: Vecchia zimarra, senti (La Bohème)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 78.278
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.26
  additional property: Energy
    type: PropertyValue
    value: 0.193
  additional property: Speechiness
    type: PropertyValue
    value: 0.123
  additional property: Acousticness
    type: PropertyValue
    value: 0.988
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.006
  additional property: Liveness
    type: PropertyValue
    value: 0.38
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.177
  additional property: Loudness (dB)
    type: PropertyValue
    value: -21.324
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Major

Le veau d´or (Faust)
type: MusicRecording
duration: PT2M51S
duration ms: 171373
explicit: false
by artist: Cesare Siepi
by artist: Metropolitan Opera Orchestra
by artist: Lawrence Davidson
in album: Lebendige Vergangenheit - Cesare Siepi (Vol.2)
  type: MusicAlbum
  date published: 2006-08-14
genre: classical
genre: opera
isrc code: ATP130664212
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T15:22:12+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1aacc5ec95b7a10dee5605d27c4723cdae64cbf631778af5e8515f2c72210b51
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960427
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960427
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATP130664212
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T15:59:18Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aacc5ec95b7a10dee5605d27c4723cdae64cbf631778af5e8515f2c72210b51. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/ATP130664212.
  date published: 2026-07-31T15:59:18Z
audio: Le veau d´or (Faust)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 134.277
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.452
  additional property: Energy
    type: PropertyValue
    value: 0.396
  additional property: Speechiness
    type: PropertyValue
    value: 0.073
  additional property: Acousticness
    type: PropertyValue
    value: 0.988
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.012
  additional property: Liveness
    type: PropertyValue
    value: 0.096
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.373
  additional property: Loudness (dB)
    type: PropertyValue
    value: -15.49
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Vous qui faites l´endormie (Faust)
type: MusicRecording
duration: PT4M6S
duration ms: 246733
explicit: false
by artist: Cesare Siepi
by artist: Eugene Conley
by artist: Metropolitan Opera Orchestra
in album: Lebendige Vergangenheit - Cesare Siepi (Vol.2)
  type: MusicAlbum
  date published: 2006-08-14
genre: classical
genre: opera
isrc code: ATP130664213
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T20:01:23+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x20b44a2e9c8ffe530ae5b8042148392cc00e69f3872e658008c5e41069f5820d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960459
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960459
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATP130664213
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T20:22:46Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b44a2e9c8ffe530ae5b8042148392cc00e69f3872e658008c5e41069f5820d. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ATP130664213.
  date published: 2026-07-31T20:22:46Z
audio: Vous qui faites l´endormie (Faust)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 96.039
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.258
  additional property: Energy
    type: PropertyValue
    value: 0.274
  additional property: Speechiness
    type: PropertyValue
    value: 0.064
  additional property: Acousticness
    type: PropertyValue
    value: 0.99
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.43
  additional property: Liveness
    type: PropertyValue
    value: 0.127
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.356
  additional property: Loudness (dB)
    type: PropertyValue
    value: -18.46
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Lebendige Vergangenheit - Cesare Siepi
type: MusicAlbum
date published: 2006-07-30
track: La calunnia (Il Barbiere di Siviglia)
  type: MusicRecording
  duration: PT4M23S
  duration ms: 263266
  explicit: false
  by artist: Cesare Siepi
  by artist: Orchestra Sinfonica di Torino della Radio Italiana
  in album: Lebendige Vergangenheit - Cesare Siepi
    type: MusicAlbum
    date published: 2006-07-30
  genre: classical
  genre: opera
  isrc code: ATP130051102
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-07T20:29:01+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xeea151af1de4df91f04b354f797596c47e569d9a462f17a34aacfe86678c68ac
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957124
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957124
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATP130051102
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T03:53:27Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea151af1de4df91f04b354f797596c47e569d9a462f17a34aacfe86678c68ac. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ATP130051102.
    date published: 2026-07-08T03:53:27Z
  audio: La calunnia (Il Barbiere di Siviglia)
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 100.972
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.389
    additional property: Energy
      type: PropertyValue
      value: 0.339
    additional property: Speechiness
      type: PropertyValue
      value: 0.107
    additional property: Acousticness
      type: PropertyValue
      value: 0.925
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.015
    additional property: Liveness
      type: PropertyValue
      value: 0.101
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.218
    additional property: Loudness (dB)
      type: PropertyValue
      value: -15.351
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Le femmine d´Italia (L´Italiana in Algeri)
  type: MusicRecording
  duration: PT3M24S
  duration ms: 204693
  explicit: false
  by artist: Cesare Siepi
  by artist: Orchestra Sinfonica di Torino della Radio Italiana
  in album: Lebendige Vergangenheit - Cesare Siepi
    type: MusicAlbum
    date published: 2006-07-30
  genre: classical
  genre: opera
  isrc code: ATP130051103
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-07T14:46:10+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x0134c26d4918d76e6c24f2382e7eab159b00b91230b2e95232ea59c0351d1748
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957118
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957118
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATP130051103
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T03:20:19Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0134c26d4918d76e6c24f2382e7eab159b00b91230b2e95232ea59c0351d1748. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATP130051103.
    date published: 2026-07-08T03:20:19Z
  audio: Le femmine d´Italia (L´Italiana in Algeri)
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 137.528
    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: 0.466
    additional property: Energy
      type: PropertyValue
      value: 0.264
    additional property: Speechiness
      type: PropertyValue
      value: 0.046
    additional property: Acousticness
      type: PropertyValue
      value: 0.993
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.059
    additional property: Liveness
      type: PropertyValue
      value: 0.076
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.339
    additional property: Loudness (dB)
      type: PropertyValue
      value: -14.167
    additional property: Key Name
      type: PropertyValue
      value: G
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Vi ravviso, luoghi ameni (La Sonnambula)
  type: MusicRecording
  duration: PT3M2S
  duration ms: 182333
  explicit: false
  by artist: Cesare Siepi
  by artist: Orchestra Sinfonica di Torino della Radio Italiana
  in album: Lebendige Vergangenheit - Cesare Siepi
    type: MusicAlbum
    date published: 2006-07-30
  genre: classical
  genre: opera
  isrc code: ATP130051104
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-22T07:03:30+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x9f0b3b64f839ffdb10826155161803ccae84e8e9cf85bbf06c1e83ade0381f88
  additional property: OTSHash
  additional property: OTSBitcoinBlock
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Vi ravviso, luoghi ameni (La Sonnambula)
track: Tu sul labbro de veggenti (Nabucco)
track: O tu Palermo (I vespri siciliani)

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 959107

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/959107

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATP130051104

OTSTimestamp
type: PropertyValue
value: 2026-07-22T07:19:23Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0b3b64f839ffdb10826155161803ccae84e8e9cf85bbf06c1e83ade0381f88. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/ATP130051104.
date published: 2026-07-22T07:19:23Z

Vi ravviso, luoghi ameni (La Sonnambula)
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 85.848
additional property: Musical Key
  type: PropertyValue
  value: 8
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 3
additional property: Danceability
  type: PropertyValue
  value: 0.217
additional property: Energy
  type: PropertyValue
  value: 0.364
additional property: Speechiness
  type: PropertyValue
  value: 0.061
additional property: Acousticness
  type: PropertyValue
  value: 0.979
additional property: Instrumentalness
  type: PropertyValue
  value: 0.383
additional property: Liveness
  type: PropertyValue
  value: 0.117
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.238
additional property: Loudness (dB)
  type: PropertyValue
  value: -13.012
additional property: Key Name
  type: PropertyValue
  value: Ab
additional property: Mode Name
  type: PropertyValue
  value: Major

Tu sul labbro de veggenti (Nabucco)
type: MusicRecording
duration: PT4M52S
duration ms: 292306
explicit: false
by artist: Cesare Siepi
by artist: Orchestra Sinfonica di Torino della Radio Italiana
in album: Lebendige Vergangenheit - Cesare Siepi
  type: MusicAlbum
  date published: 2006-07-30
genre: classical
genre: opera
isrc code: ATP130051105
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-30T15:40:07+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5aff85d5ec9c7e11659a74c5799b6849fa9a64e2b75fcd95588222e360faac4a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960276
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960276
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATP130051105
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T16:01:17Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aff85d5ec9c7e11659a74c5799b6849fa9a64e2b75fcd95588222e360faac4a. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/ATP130051105.
  date published: 2026-07-30T16:01:17Z
audio: Tu sul labbro de veggenti (Nabucco)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 99.059
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 6
  additional property: Danceability
    type: PropertyValue
    value: 0.221
  additional property: Energy
    type: PropertyValue
    value: 0.312
  additional property: Speechiness
    type: PropertyValue
    value: 0.054
  additional property: Acousticness
    type: PropertyValue
    value: 0.974
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.211
  additional property: Liveness
    type: PropertyValue
    value: 0.115
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.099
  additional property: Loudness (dB)
    type: PropertyValue
    value: -17.708
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Major

O tu Palermo (I vespri siciliani)
type: MusicRecording
duration: PT4M25S
duration ms: 265533
explicit: false
by artist: Cesare Siepi
by artist: Orchestra Sinfonica di Torino della Radio Italiana
in album: Lebendige Vergangenheit - Cesare Siepi
  type: MusicAlbum
  date published: 2006-07-30
genre: classical
genre: opera
isrc code: ATP130051107
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T15:23:16+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2c8e4d68956f94574e8f600c5852fdc4fcff99d4aaa423b3cec20bcf68d402d8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960422
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960422
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATP130051107
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T15:27:29Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8e4d68956f94574e8f600c5852fdc4fcff99d4aaa423b3cec20bcf68d402d8. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/ATP130051107.
  date published: 2026-07-31T15:27:29Z
audio: O tu Palermo (I vespri siciliani)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 163.455
  additional property: Musical Key
    type: PropertyValue
    value: 6
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.218
  additional property: Energy
    type: PropertyValue
    value: 0.287
  additional property: Speechiness
    type: PropertyValue
    value: 0.04
  additional property: Acousticness
    type: PropertyValue
    value: 0.994
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.106
  additional property: Liveness
    type: PropertyValue
    value: 0.077
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.206
  additional property: Loudness (dB)
    type: PropertyValue
    value: -16.924
  additional property: Key Name
    type: PropertyValue
    value: F#
  additional property: Mode Name
    type: PropertyValue
    value: Major

Rossini: The Barber Of Seville
type: MusicAlbum
date published: 2000-01-01

Mefistofele, Prologue: Ave, signor, perdona se il mio gergo
type: MusicRecording
duration: PT4M14S
duration ms: 254546
explicit: false
by artist: Arrigo Boito
by artist: Cesare Siepi
by artist: Orchestra dell'Accademia Nazionale di Santa Cecilia
by artist: Tullio Serafin
in album: Boito: Mefistofele
  type: MusicAlbum
  date published: 2018-07-06
popularity: 2
isrc code: ITCC51104198
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T08:52:33+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa3d3ca349ec73c1b2b2843589b9bdf680fac29b433325191a7cfc115e93091b0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960376
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960376
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITCC51104198
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T09:09:19Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d3ca349ec73c1b2b2843589b9bdf680fac29b433325191a7cfc115e93091b0. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/ITCC51104198.
  date published: 2026-07-31T09:09:19Z
audio: Mefistofele, Prologue: Ave, signor, perdona se il mio gergo
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 164.857
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.312
  additional property: Energy
    type: PropertyValue
    value: 0.155
  additional property: Speechiness
    type: PropertyValue
    value: 0.07
  additional property: Acousticness
    type: PropertyValue
    value: 0.851
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.001
  additional property: Liveness
    type: PropertyValue
    value: 0.419
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.168
  additional property: Loudness (dB)
    type: PropertyValue
    value: -25.895
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Major

Mefistofele, Prologue: T'è noto Faust?
type: MusicRecording
duration: PT3M46S
duration ms: 226386
explicit: false
by artist: Arrigo Boito
by artist: Cesare Siepi
by artist: Coro dell'Accademia Nazionale Di Santa Cecilia
by artist: Orchestra dell'Accademia Nazionale di Santa Cecilia
by artist: Tullio Serafin
in album: Boito: Mefistofele
  type: MusicAlbum
  date published: 2018-07-06
popularity: 2
isrc code: ITCC51104199
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T22:05:49+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x67eb60dda762f972abdddff00a13673e27a6b7629f9cd0df4cf0f3cfb4c30d0c
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: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITCC51104199
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T22:27:44Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67eb60dda762f972abdddff00a13673e27a6b7629f9cd0df4cf0f3cfb4c30d0c. 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/ITCC51104199.
  date published: 2026-07-31T22:27:44Z
audio: Mefistofele, Prologue: T'è noto Faust?
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 116.138
  additional property: Musical Key
    type: PropertyValue
    value: 8
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 6
  additional property: Danceability
    type: PropertyValue
    value: 0.266
  additional property: Energy
    type: PropertyValue
    value: 0.163
  additional property: Speechiness
    type: PropertyValue
    value: 0.062
  additional property: Acousticness
    type: PropertyValue
    value: 0.939
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.192
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.081
  additional property: Loudness (dB)
    type: PropertyValue
    value: -25.619
  additional property: Key Name
    type: PropertyValue
    value: Ab
  additional property: Mode Name
    type: PropertyValue
    value: Major

Mefistofele, Act I: Son lo spirito che nega
type: MusicRecording
duration: PT8M41S
duration ms: 521559
explicit: false
by artist: Arrigo Boito
by artist: Cesare Siepi
by artist: Mario del Monaco
by artist: Orchestra dell'Accademia Nazionale di Santa Cecilia
by artist: Tullio Serafin
in album: Boito: Mefistofele
  type: MusicAlbum
  date published: 2018-07-06
popularity: 2
isrc code: ITCC51104205
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T03:12:52+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf1848f04d98d4ba9a4554a13152da812e53e67385faa97ec9be94efb837c6b97
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960344
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960344
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITCC51104205
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T04:14:58Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1848f04d98d4ba9a4554a13152da812e53e67385faa97ec9be94efb837c6b97. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ITCC51104205.
  date published: 2026-07-31T04:14:58Z
audio: Mefistofele, Act I: Son lo spirito che nega
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 105.779
  additional property: Musical Key
    type: PropertyValue
    value: 8
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
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Mefistofele, Epilogue: Ave signor, signor degli angeli
type: MusicRecording
duration: PT3M20S
duration ms: 200266
explicit: false
by artist: Arrigo Boito
by artist: Coro dell'Accademia Nazionale Di Santa Cecilia
by artist: Cesare Siepi
by artist: Mario del Monaco
by artist: Orchestra dell'Accademia Nazionale di Santa Cecilia
by artist: Tullio Serafin
in album: Boito: Mefistofele
  type: MusicAlbum
  date published: 2018-07-06
popularity: 2
isrc code: ITCC51104224
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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: 2026-07-30T21:35:24Z
audio: Mefistofele, Epilogue: Ave signor, signor degli angeli
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