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type: MusicGroup
genre: opera
popularity: 2
followers: 12
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x68624f5f73462cea530f5b57ab480716a62e8ea7e53378a11af6c06c205532ed
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954705
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954705
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ec66c139-99e1-4732-b5de-b689f5dbf909.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ec66c139-99e1-4732-b5de-b689f5dbf909.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ec66c139-99e1-4732-b5de-b689f5dbf909
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T13:42:37Z
additional property: OTSCanonicalRecord
  type: PropertyValue
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin 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 0x68624f5f73462cea530f5b57ab480716a62e8ea7e53378a11af6c06c205532ed. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec66c139-99e1-4732-b5de-b689f5dbf909.json and https://artists.proofprofile.net/proofs/artist/ec66c139-99e1-4732-b5de-b689f5dbf909.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T13:42:37Z
  text: {"copyright_id":"0x68624f5f73462cea530f5b57ab480716a62e8ea7e53378a11af6c06c205532ed","name":"Magda Nádor","registered_at":"2026-06-21T11:21:20Z","symbol":"NIM1909321","token_address":"0xe70dd19ff246bdc808983b6d904724b400f4a631","type":"artist","uuid":"ec66c139-99e1-4732-b5de-b689f5dbf909"}
track: Un ballo in maschera, Act I: Act I Scene 1: Posa in pace (Dehorn, Ribbing, Oscar, Chorus)
  type: MusicRecording
  duration: PT1M45S
  duration ms: 105440
  explicit: false
  by artist: Giuseppe Verdi
  by artist: Franco de Grandis
  by artist: Goran Simic
  by artist: Magda Nádor
  by artist: Vienna State Opera Chorus
  by artist: Vienna State Opera Orchestra
  by artist: Claudio Abbado
  in album: Verdi: Un ballo in maschera (Live)
    type: MusicAlbum
    date published: 2016-08-01
  genre: classical
  genre: opera
  isrc code: DEB951590702
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-31T17:42:32+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x010d74d4e2e9867e1d8eeab4cc6f1a8f69786087a1a43dc3d36d9b69932fc384
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  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960448
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB951590702
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-31T18:48:12Z
  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 0x010d74d4e2e9867e1d8eeab4cc6f1a8f69786087a1a43dc3d36d9b69932fc384. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEB951590702.
    date published: 2026-07-31T18:48:12Z
  audio: Un ballo in maschera, Act I: Act I Scene 1: Posa in pace (Dehorn, Ribbing, Oscar, Chorus)
    type: AudioObject
    additional property: Tempo (BPM)
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      value: 102.004
    additional property: Musical Key
      type: PropertyValue
      value: 11
    additional property: Mode (Major/Minor)
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      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
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    additional property: Energy
      type: PropertyValue
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    additional property: Speechiness
      type: PropertyValue
      value: 0.042
    additional property: Acousticness
      type: PropertyValue
      value: 0.942
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.002
    additional property: Liveness
      type: PropertyValue
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    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.097
    additional property: Loudness (dB)
      type: PropertyValue
      value: -35.036
    additional property: Key Name
      type: PropertyValue
      value: B
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Un ballo in maschera, Act I: Act I Scene 1: Amici miei, soldati (Gustavo, Oscar, Dehorn, Ribbing, Chorus)
  type: MusicRecording
  duration: PT3M32S
  duration ms: 212640
  explicit: false
  by artist: Giuseppe Verdi
  by artist: Luciano Pavarotti
  by artist: Magda Nádor
  by artist: Franco de Grandis
  by artist: Goran Simic
  by artist: Vienna State Opera Chorus
  by artist: Vienna State Opera Orchestra
  by artist: Claudio Abbado
  in album: Verdi: Un ballo in maschera (Live)
    type: MusicAlbum
    date published: 2016-08-01
  genre: classical
  genre: opera
  isrc code: DEB951590703
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-31T02:27:38+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x2eee2f1f0973cd85045a0274daa7799e7bb2a5413b3ad91a1dc780bf6d4babbc
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960337
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960337
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB951590703
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-31T02:51:48Z
  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 0x2eee2f1f0973cd85045a0274daa7799e7bb2a5413b3ad91a1dc780bf6d4babbc. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEB951590703.
    date published: 2026-07-31T02:51:48Z
  audio: Un ballo in maschera, Act I: Act I Scene 1: Amici miei, soldati (Gustavo, Oscar, Dehorn, Ribbing, Chorus)
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 165.485
    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: 0.269
    additional property: Energy
      type: PropertyValue
      value: 0.254
    additional property: Speechiness
    additional property: Acousticness
    additional property: Instrumentalness
    additional property: Liveness
    additional property: Valence (Positivity)
    additional property: Loudness (dB)
    additional property: Key Name
    additional property: Mode Name
track: Un ballo in maschera, Act I: Act I Scene 1: Il cenno mio di la con essi attendi (Gustavo, Oscar, Renato)
track: Un ballo in maschera, Act I: Act I Scene 1: Il primo giudice (Oscar, Riccardo, Giudice, Gustavo, Dehorn, Ribbing, Chorus)
track: Un ballo in maschera, Act I: Act I Scene 2: Su profetssa, monta il trepie - Di' tu se fidele (Dehorn, Ribbing, Oscar, Gustavo, Chorus)
track: Un ballo in maschera, Act I: Act I Scene 2: Chi voi siate (Ulrica, Dehorn, Ribbing, Gustavo, Renato, Cristiano, Oscar, Chorus)
track: Un ballo in maschera, Act I: Act I: Finisci il vaticinio (Gustavo, Ulrica, Dehorn, Ribbing, Renato, Cristiano, Oscar, Chorus)
track: Un ballo in maschera, Act III: Act III Scene 2: Ah! dessa e la … Si, rivederti, Amelia (Gustavo, Oscar, Dehorn, Renato, Ribbing, Chorus)

Speechiness
type: PropertyValue
value: 0.119

Acousticness
type: PropertyValue
value: 0.912

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.923

Valence (Positivity)
type: PropertyValue
value: 0.303

Loudness (dB)
type: PropertyValue
value: -23.284

Key Name
type: PropertyValue
value: C#

Mode Name
type: PropertyValue
value: Major

Un ballo in maschera, Act I: Act I Scene 1: Il cenno mio di la con essi attendi (Gustavo, Oscar, Renato)
type: MusicRecording
duration: PT2M17S
duration ms: 137480
explicit: false
by artist: Giuseppe Verdi
by artist: Luciano Pavarotti
by artist: Magda Nádor
by artist: Piero Cappuccilli
by artist: Vienna State Opera Orchestra
by artist: Claudio Abbado
in album: Verdi: Un ballo in maschera (Live)
  type: MusicAlbum
  date published: 2016-08-01
genre: classical
genre: opera
isrc code: DEB951590704
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T15:57:53+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5fe8fb7709f6c864a8dfb9c378894a3a155142bc0701b092886a90a2901155c5
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/DEB951590704
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 0x5fe8fb7709f6c864a8dfb9c378894a3a155142bc0701b092886a90a2901155c5. 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/DEB951590704.
  date published: 2026-07-08T03:20:19Z
audio: Un ballo in maschera, Act I: Act I Scene 1: Il cenno mio di la con essi attendi (Gustavo, Oscar, Renato)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 140.358
  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: 0.37
  additional property: Energy
    type: PropertyValue
    value: 0.14
  additional property: Speechiness
    type: PropertyValue
    value: 0.066
  additional property: Acousticness
    type: PropertyValue
    value: 0.95
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.247
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.195
  additional property: Loudness (dB)
    type: PropertyValue
    value: -24.91
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Major

Un ballo in maschera, Act I: Act I Scene 1: Il primo giudice (Oscar, Riccardo, Giudice, Gustavo, Dehorn, Ribbing, Chorus)
type: MusicRecording
duration: PT6M45S
duration ms: 405666
explicit: false
by artist: Giuseppe Verdi
by artist: Magda Nádor
by artist: Alexander Maly
by artist: Luciano Pavarotti
by artist: Franco de Grandis
by artist: Goran Simic
by artist: Vienna State Opera Chorus
by artist: Vienna State Opera Orchestra
by artist: Claudio Abbado
in album: Verdi: Un ballo in maschera (Live)
  type: MusicAlbum
  date published: 2016-08-01
genre: classical
genre: opera
isrc code: DEB951590706
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T04:51:53+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3d7e4f4916e86a4b30387a49273ebe4694e3e417eccdc25785c883e0a88d49a8
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/DEB951590706
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 0x3d7e4f4916e86a4b30387a49273ebe4694e3e417eccdc25785c883e0a88d49a8. 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/DEB951590706.
  date published: 2026-07-08T03:20:19Z
audio: Un ballo in maschera, Act I: Act I Scene 1: Il primo giudice (Oscar, Riccardo, Giudice, Gustavo, Dehorn, Ribbing, Chorus)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 99.816
  additional property: Musical Key
    type: PropertyValue
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  additional property: Mode (Major/Minor)
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    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.409
  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
    type: PropertyValue
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  additional property: Liveness
    type: PropertyValue
    value: 0.455
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.177
  additional property: Loudness (dB)
    type: PropertyValue
    value: -22.9
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Un ballo in maschera, Act I: Act I Scene 2: Su profetssa, monta il trepie - Di' tu se fidele (Dehorn, Ribbing, Oscar, Gustavo, Chorus)
type: MusicRecording
duration: PT4M17S
duration ms: 257666
explicit: false
by artist: Giuseppe Verdi
by artist: Franco de Grandis
by artist: Goran Simic
by artist: Magda Nádor
by artist: Luciano Pavarotti
by artist: Vienna State Opera Chorus
by artist: Vienna State Opera Orchestra
by artist: Claudio Abbado
in album: Verdi: Un ballo in maschera (Live)
  type: MusicAlbum
  date published: 2016-08-01
genre: classical
genre: opera
isrc code: DEB951590711
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T15:29:07+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xffa6702840595bdea8ecad3cc70ab41018d7892bcecbed19a7b88eddbf2b32f7
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/DEB951590711
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 0xffa6702840595bdea8ecad3cc70ab41018d7892bcecbed19a7b88eddbf2b32f7. 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/DEB951590711.
  date published: 2026-07-08T03:20:19Z
audio: Un ballo in maschera, Act I: Act I Scene 2: Su profetssa, monta il trepie - Di' tu se fidele (Dehorn, Ribbing, Oscar, Gustavo, Chorus)
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  additional property: Tempo (BPM)
    type: PropertyValue
    value: 164.694
  additional property: Musical Key
    type: PropertyValue
    value: 8
  additional property: Mode (Major/Minor)
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    value: 1
  additional property: Time Signature
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    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.34
  additional property: Energy
    type: PropertyValue
    value: 0.186
  additional property: Speechiness
    type: PropertyValue
    value: 0.135
  additional property: Acousticness
    type: PropertyValue
    value: 0.93
  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
    type: PropertyValue
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Un ballo in maschera, Act I: Act I Scene 2: Chi voi siate (Ulrica, Dehorn, Ribbing, Gustavo, Renato, Cristiano, Oscar, Chorus)
type: MusicRecording
duration: PT5M49S
duration ms: 349546
explicit: false
by artist: Giuseppe Verdi
by artist: Ludmila Schemtschuk
by artist: Franco de Grandis
by artist: Goran Simic
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by artist: Georg Tichy
by artist: Magda Nádor
by artist: Vienna State Opera Chorus
by artist: Vienna State Opera Orchestra
by artist: Claudio Abbado
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genre: opera
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T15:20:15Z
audio: Un ballo in maschera, Act I: Act I Scene 2: Chi voi siate (Ulrica, Dehorn, Ribbing, Gustavo, Renato, Cristiano, Oscar, Chorus)
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Un ballo in maschera, Act I: Act I: Finisci il vaticinio (Gustavo, Ulrica, Dehorn, Ribbing, Renato, Cristiano, Oscar, Chorus)
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by artist: Luciano Pavarotti
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by artist: Franco de Grandis
by artist: Goran Simic
by artist: Piero Cappuccilli
by artist: Georg Tichy
by artist: Magda Nádor
by artist: Vienna State Opera Chorus
by artist: Vienna State Opera Orchestra
by artist: Claudio Abbado
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  date published: 2016-08-01
genre: classical
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T08:38:45Z
audio: Un ballo in maschera, Act I: Act I: Finisci il vaticinio (Gustavo, Ulrica, Dehorn, Ribbing, Renato, Cristiano, Oscar, Chorus)
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Un ballo in maschera, Act III: Act III Scene 2: Ah! dessa e la … Si, rivederti, Amelia (Gustavo, Oscar, Dehorn, Renato, Ribbing, Chorus)
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duration: PT6M59S
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by artist: Giuseppe Verdi
by artist: Luciano Pavarotti
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by artist: Franco de Grandis
by artist: Piero Cappuccilli
by artist: Goran Simic
by artist: Vienna State Opera Chorus
by artist: Vienna State Opera Orchestra
by artist: Claudio Abbado
in album: Verdi: Un ballo in maschera (Live)
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  date published: 2016-08-01
genre: classical
genre: opera
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  date published: 2026-07-31T15:20:15Z
audio: Un ballo in maschera, Act III: Act III Scene 2: Ah! dessa e la … Si, rivederti, Amelia (Gustavo, Oscar, Dehorn, Renato, Ribbing, Chorus)
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