Laurel Hurley
type: MusicGroup
genre: opera
description: Laurel Hurley (February 14, 1927 – December 6, 2013) was an American soprano performer. She performed a diverse repertoire from musical theatre, operetta and opera, encompassing roles in the lyric sop
popularity: 3
followers: 16
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subject of: OpenTimestamps Proof of Existence
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album: Offenbach: Les contes d'Hoffmann [Recorded 1956]
  type: MusicAlbum
  date published: 2014-07-01
album: Puccini: La Bohème (Metropolitan Opera)
  type: MusicAlbum
  date published: 2011-01-21
album: Puccini: La bohème & Highlights from Tosca (Live)
  type: MusicAlbum
  date published: 2015-02-01
album: Beethoven: Fidelio (Live Recording 1960)
  type: MusicAlbum
  date published: 2014-08-01
album: Verdi: Un ballo in maschera (Recorded 1959)
  type: MusicAlbum
  date published: 2015-03-01
album: Mussorgsky: Boris Godunov (Sung in English) [Live Recording 1956]
  type: MusicAlbum
  date published: 2014-07-01
album: Bellini: I Capuleti e i Montecchi (Live)
  type: MusicAlbum
  date published: 2007-09-02
album: The Merry Widow Highlights
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  date published: 2000-01-01
album: Mozart: Don Giovanni
  type: MusicAlbum
  date published: 2013-06-21
album: The Merry Widow
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    by artist: Charles Davis
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-08-01T01:44:32Z
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  track: The Merry Widow: Vilja
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    subject of: OpenTimestamps Proof of Existence
    audio: The Merry Widow: Vilja
album: Essential Opera: The Best Duets Ever
album: Beethoven: Fidelio (Metropolitan Opera)
album: Mozart: Don Giovanni, K. 527 (Recorded 1959)
album: Puccini: Gianni Schicchi (1958)
album: Offenbach: Les contes d'Hoffmann (The Tales of Hoffmann) [Recorded 1956]
album: Puccini: La Bohème (1958)
album: Die Zauberflote (Sung in English) (1956)
album: Wagner: Parsifal, WWV 111
album: Mozart, W.A.: Zauberflote (Die) [Sung in English] [Opera] (Walter) (1956)
album: Wagner: Siegfried (1957)
album: Mozart: Die Zauberflöte, K. 620 (Sung in English) [Recorded 1956]
album: Giacomo Puccini : La Boheme, Pagine scelte

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date published: 2026-08-01T00:10:46Z

The Merry Widow: Vilja
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Essential Opera: The Best Duets Ever
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date published: 2019-09-06
track: La traviata, Act I: "Libiamo ne'lieti" (Brindisi )
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T03:22:41Z
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track: Madama Butterfly, Act I: Finale. Duet, "Vogliatemi bene"
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-30T20:45:02Z
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Beethoven: Fidelio (Metropolitan Opera)
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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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track: Fidelio: Act I: Jetzt, Schätzchen, jetzt sind wir allein
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  by artist: Laurel Hurley
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  in album: Beethoven: Fidelio (Metropolitan Opera)
    type: MusicAlbum
    date published: 2011-04-29
  genre: classical
  genre: classical-piano
  genre: chamber-music
  isrc code: USSM11101046
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-31T07:38:59+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x8bb72ce323b61e38bb703952c7b15c443b970148ecac3e93aa816c57637c7a3f
  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/USSM11101046
  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 0x8bb72ce323b61e38bb703952c7b15c443b970148ecac3e93aa816c57637c7a3f. 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/USSM11101046.
    date published: 2026-07-31T08:26:41Z
  audio: Fidelio: Act I: Jetzt, Schätzchen, jetzt sind wir allein
    type: AudioObject
    additional property: Tempo (BPM)
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      value: 109.987
    additional property: Musical Key
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    additional property: Mode (Major/Minor)
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    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.512
    additional property: Energy
      type: PropertyValue
      value: 0.155
    additional property: Speechiness
      type: PropertyValue
      value: 0.146
    additional property: Acousticness
      type: PropertyValue
      value: 0.985
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.693
    additional property: Valence (Positivity)
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    additional property: Loudness (dB)
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      value: -22.266
    additional property: Key Name
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    additional property: Mode Name
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track: Fidelio: Der arme Jaquino ... O wär' ich schon mit dir vereint
  type: MusicRecording
  duration: PT4M22S
  duration ms: 262933
  explicit: false
  by artist: Ludwig van Beethoven
  by artist: Laurel Hurley
  by artist: Karl Böhm
  in album: Beethoven: Fidelio (Metropolitan Opera)
    type: MusicAlbum
    date published: 2011-04-29
  genre: classical
  genre: classical-piano
  genre: chamber-music
  isrc code: USSM11101047
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
  additional property: CopyrightChainExplorerURL
  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: Fidelio: Der arme Jaquino ... O wär' ich schon mit dir vereint
track: Fidelio: Guten Tag, Marzelline, ist Fidelio noch nicht zurückgekommen?
track: Fidelio: Mir ist so wunderbar
track: Fidelio: Höre, Fidelio - Hat man nicht auch Gold beneben
track: Fidelio: Gut, Söhnchen, gut
track: Fidelio: March
track: Fidelio: Ha!, welch' ein Augenblick!
track: Fidelio: Hauptmann!
track: Fidelio: Abscheulicher! Wo eilst du hin? - Komm, Hoffnung, lass den letzten Stern
track: Fidelio: Aber Marzelline - Kein Wort

CopyrightRegisteredAt
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value: 2026-07-07T17:47:27+00:00

CopyrightChainExplorerURL
type: PropertyValue
value: https://explorer.copyrightchains.com/tx/0x9534b04619e75d4d3e0773ee96b8c5497f76d7e8d3a33a8d892faa0355574b14

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 957120

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/957120

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11101047

OTSTimestamp
type: PropertyValue
value: 2026-07-08T03:22:41Z

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 0x9534b04619e75d4d3e0773ee96b8c5497f76d7e8d3a33a8d892faa0355574b14. 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/USSM11101047.
date published: 2026-07-08T03:22:41Z

Fidelio: Der arme Jaquino ... O wär' ich schon mit dir vereint
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 142.875
additional property: Musical Key
  type: PropertyValue
  value: 0
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 6
additional property: Danceability
  type: PropertyValue
  value: 0.381
additional property: Energy
  type: PropertyValue
  value: 0.045
additional property: Speechiness
  type: PropertyValue
  value: 0.085
additional property: Acousticness
  type: PropertyValue
  value: 0.988
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.623
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.281
additional property: Loudness (dB)
  type: PropertyValue
  value: -26.069
additional property: Key Name
  type: PropertyValue
  value: C
additional property: Mode Name
  type: PropertyValue
  value: Major

Fidelio: Guten Tag, Marzelline, ist Fidelio noch nicht zurückgekommen?
type: MusicRecording
duration: PT0M52S
duration ms: 52333
explicit: false
by artist: Ludwig van Beethoven
by artist: Oskar Czerwenka
by artist: Laurel Hurley
by artist: Birgit Nilsson
by artist: Karl Böhm
in album: Beethoven: Fidelio (Metropolitan Opera)
  type: MusicAlbum
  date published: 2011-04-29
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: USSM11101048
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T11:56:54+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xcceaed08c3725550fbf87c25967a7ca955333e4a210f54d0eeeadad81f824571
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/USSM11101048
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 0xcceaed08c3725550fbf87c25967a7ca955333e4a210f54d0eeeadad81f824571. 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/USSM11101048.
  date published: 2026-07-31T12:24:41Z
audio: Fidelio: Guten Tag, Marzelline, ist Fidelio noch nicht zurückgekommen?
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 133.273
  additional property: Musical Key
    type: PropertyValue
    value: 0
  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: 0.279
  additional property: Speechiness
    type: PropertyValue
    value: 0.872
  additional property: Acousticness
    type: PropertyValue
    value: 0.844
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.351
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.057
  additional property: Loudness (dB)
    type: PropertyValue
    value: -30.452
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Fidelio: Mir ist so wunderbar
type: MusicRecording
duration: PT4M33S
duration ms: 273413
explicit: false
by artist: Ludwig van Beethoven
by artist: Laurel Hurley
by artist: Birgit Nilsson
by artist: Oskar Czerwenka
by artist: Charles Anthony
by artist: Karl Böhm
in album: Beethoven: Fidelio (Metropolitan Opera)
  type: MusicAlbum
  date published: 2011-04-29
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: USSM11101049
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-30T21:21:00+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x09096e3f0ce3b747700e21e334ac4574a8a4a8113da77caf48d566d80a68dce0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960317
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960317
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11101049
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T21:35:24Z
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 0x09096e3f0ce3b747700e21e334ac4574a8a4a8113da77caf48d566d80a68dce0. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USSM11101049.
  date published: 2026-07-30T21:35:24Z
audio: Fidelio: Mir ist so wunderbar
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 100.548
  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: 0.174
  additional property: Energy
    type: PropertyValue
    value: 0.132
  additional property: Speechiness
    type: PropertyValue
    value: 0.056
  additional property: Acousticness
    type: PropertyValue
    value: 0.991
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.002
  additional property: Liveness
    type: PropertyValue
    value: 0.684
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.049
  additional property: Loudness (dB)
    type: PropertyValue
    value: -25.077
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Major

Fidelio: Höre, Fidelio - Hat man nicht auch Gold beneben
type: MusicRecording
duration: PT3M2S
duration ms: 182213
explicit: false
by artist: Ludwig van Beethoven
by artist: Oskar Czerwenka
by artist: Laurel Hurley
by artist: Karl Böhm
in album: Beethoven: Fidelio (Metropolitan Opera)
  type: MusicAlbum
  date published: 2011-04-29
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: USSM11101050
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T13:07:26+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x449930b04db10281a8c5e613eeeb7fa6ed1df9d4a1cfba617e130373db950a31
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/USSM11101050
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 0x449930b04db10281a8c5e613eeeb7fa6ed1df9d4a1cfba617e130373db950a31. 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/USSM11101050.
  date published: 2026-07-08T03:20:19Z
audio: Fidelio: Höre, Fidelio - Hat man nicht auch Gold beneben
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 101.181
  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: 0.455
  additional property: Energy
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    value: 0.199
  additional property: Speechiness
    type: PropertyValue
    value: 0.233
  additional property: Acousticness
    type: PropertyValue
    value: 0.981
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.725
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.646
  additional property: Loudness (dB)
    type: PropertyValue
    value: -22.455
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Fidelio: Gut, Söhnchen, gut
type: MusicRecording
duration: PT6M36S
duration ms: 396400
explicit: false
by artist: Ludwig van Beethoven
by artist: Oskar Czerwenka
by artist: Birgit Nilsson
by artist: Laurel Hurley
by artist: Karl Böhm
in album: Beethoven: Fidelio (Metropolitan Opera)
  type: MusicAlbum
  date published: 2011-04-29
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: USSM11101052
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T21:40:07+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x518d5b5c5943ea26fb2d93de124f23419b38c83d4d8ec69f2d2a36c6bb7d3728
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/USSM11101052
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 0x518d5b5c5943ea26fb2d93de124f23419b38c83d4d8ec69f2d2a36c6bb7d3728. 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/USSM11101052.
  date published: 2026-07-31T22:27:44Z
audio: Fidelio: Gut, Söhnchen, gut
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 140.15
  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: 0.344
  additional property: Energy
    type: PropertyValue
    value: 0.211
  additional property: Speechiness
    type: PropertyValue
    value: 0.063
  additional property: Acousticness
    type: PropertyValue
    value: 0.989
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.727
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.237
  additional property: Loudness (dB)
    type: PropertyValue
    value: -21.64
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Major

Fidelio: March
type: MusicRecording
duration: PT1M59S
duration ms: 119893
explicit: false
by artist: Ludwig van Beethoven
by artist: Karl Böhm
by artist: Metropolitan Opera Orchestra
in album: Beethoven: Fidelio (Metropolitan Opera)
  type: MusicAlbum
  date published: 2011-04-29
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: USSM11101053
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T14:38:12+00:00
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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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/USSM11101053
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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41320a932825df66fd704ace6486d41f8c0a8696e0c7939f6e1d7715212946fc. 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/USSM11101053.
  date published: 2026-07-08T03:20:19Z
audio: Fidelio: March
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    type: PropertyValue
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  additional property: Danceability
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  additional property: Energy
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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
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  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.464
  additional property: Loudness (dB)
    type: PropertyValue
    value: -26.394
  additional property: Key Name
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    value: Bb
  additional property: Mode Name
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Fidelio: Ha!, welch' ein Augenblick!
type: MusicRecording
duration: PT2M53S
duration ms: 173733
explicit: false
by artist: Ludwig van Beethoven
by artist: Hermann Uhde
by artist: Karl Böhm
in album: Beethoven: Fidelio (Metropolitan Opera)
  type: MusicAlbum
  date published: 2011-04-29
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: USSM11101055
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T16:37:17+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x23969ad49955f3dae8ed429ac926e90af7aa7cdafa652dca30d793a4b6288f17
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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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/USSM11101055
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 0x23969ad49955f3dae8ed429ac926e90af7aa7cdafa652dca30d793a4b6288f17. 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/USSM11101055.
  date published: 2026-07-08T03:20:19Z
audio: Fidelio: Ha!, welch' ein Augenblick!
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
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    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.344
  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
    value: 0.034
  additional property: Acousticness
    type: PropertyValue
    value: 0.981
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.108
  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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Fidelio: Hauptmann!
type: MusicRecording
duration: PT0M34S
duration ms: 34173
explicit: false
by artist: Ludwig van Beethoven
by artist: Hermann Uhde
by artist: Oskar Czerwenka
by artist: Karl Böhm
in album: Beethoven: Fidelio (Metropolitan Opera)
  type: MusicAlbum
  date published: 2011-04-29
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: USSM11101056
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T13:13:49+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3eb44b738f62ffa51f91f97d54c5200bf5ee2acb2f7e82d8815d14908c834e34
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/USSM11101056
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 0x3eb44b738f62ffa51f91f97d54c5200bf5ee2acb2f7e82d8815d14908c834e34. 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/USSM11101056.
  date published: 2026-07-08T03:20:19Z
audio: Fidelio: Hauptmann!
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 116.071
  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
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  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
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  additional property: Instrumentalness
    type: PropertyValue
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  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
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  additional property: Loudness (dB)
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Fidelio: Abscheulicher! Wo eilst du hin? - Komm, Hoffnung, lass den letzten Stern
type: MusicRecording
duration: PT7M39S
duration ms: 459000
explicit: false
by artist: Ludwig van Beethoven
by artist: Birgit Nilsson
by artist: Karl Böhm
in album: Beethoven: Fidelio (Metropolitan Opera)
  type: MusicAlbum
  date published: 2011-04-29
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: USSM11101058
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T20:30:43+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x31ddcbbba4a9dafa9af35817f76c51c46d12a5e267b723a3ef0cc2385268170e
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960468
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11101058
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T21:25:57Z
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 0x31ddcbbba4a9dafa9af35817f76c51c46d12a5e267b723a3ef0cc2385268170e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USSM11101058.
  date published: 2026-07-31T21:25:57Z
audio: Fidelio: Abscheulicher! Wo eilst du hin? - Komm, Hoffnung, lass den letzten Stern
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 103.262
  additional property: Musical Key
    type: PropertyValue
    value: 4
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.282
  additional property: Energy
    type: PropertyValue
    value: 0.154
  additional property: Speechiness
    type: PropertyValue
    value: 0.058
  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
    type: PropertyValue
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  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.12
  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
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  additional property: Mode Name
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Fidelio: Aber Marzelline - Kein Wort
type: MusicRecording
duration: PT0M57S
duration ms: 57986
explicit: false
by artist: Ludwig van Beethoven
by artist: Charles Anthony
by artist: Laurel Hurley
by artist: Oskar Czerwenka
by artist: Birgit Nilsson
by artist: Karl Böhm
in album: Beethoven: Fidelio (Metropolitan Opera)
  type: MusicAlbum
  date published: 2011-04-29
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: USSM11101059
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
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  value: 2026-07-07T17:17:25+00:00
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957124
additional property: OTSVerificationAPI
  type: PropertyValue
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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 0xa1c0f90be55e853990216f4c5fc4145c733389f5e48773e2d82e3655fc276efe. 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/USSM11101059.
  date published: 2026-07-08T03:53:27Z
audio: Fidelio: Aber Marzelline - Kein Wort
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 94.086
  additional property: Musical Key
    type: PropertyValue
    value: 10
  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.681
  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
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  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.394
  additional property: Loudness (dB)
    type: PropertyValue
    value: -33.322
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
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Mozart: Don Giovanni, K. 527 (Recorded 1959)
type: MusicAlbum
date published: 2014-08-01

Puccini: Gianni Schicchi (1958)
type: MusicAlbum
date published: 2014-12-01

Offenbach: Les contes d'Hoffmann (The Tales of Hoffmann) [Recorded 1956]
type: MusicAlbum
date published: 2014-07-01

Puccini: La Bohème (1958)
type: MusicAlbum
date published: 2015-01-01

Die Zauberflote (Sung in English) (1956)
type: MusicAlbum
date published: 2014-07-01

Wagner: Parsifal, WWV 111
type: MusicAlbum
date published: 2015-03-01

Mozart, W.A.: Zauberflote (Die) [Sung in English] [Opera] (Walter) (1956)
type: MusicAlbum
date published: 2011-04-01

Wagner: Siegfried (1957)
type: MusicAlbum
date published: 2015-03-01

Mozart: Die Zauberflöte, K. 620 (Sung in English) [Recorded 1956]
type: MusicAlbum
date published: 2014-07-01

Giacomo Puccini : La Boheme, Pagine scelte
type: MusicAlbum
date published: 2011-01-31