Lukás Vasilek
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genre: choral
genre: opera
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followers: 66
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  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin 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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album: Martinů: Bouquet of Flowers - Novák: Philharmonic Dances
  type: MusicAlbum
  date published: 2017-11-16
album: Janáček: Glagolitic Mass, The Eternal Gospel
  type: MusicAlbum
  date published: 2014-09-19
album: Martinů: The Epic of Gilgamesh
  type: MusicAlbum
  date published: 2017-10-20
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    by artist: Bohuslav Martinů
    by artist: Czech Philharmonic
    by artist: Prague Philharmonic Choir
    by artist: Manfred Honeck
    by artist: Lukás Vasilek
    by artist: Jan Martiník
    by artist: Simon Callow
    by artist: Lucy Crowe
    by artist: Andrew Staples
    by artist: Derek Welton
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    additional property: OTSVerifyInstructions
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      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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: 2026-07-31T02:51:48Z
    audio: The Epic of Gilgamesh, Pt. 1: Tablets Nos. 1& 2
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album: Diva - The Very Best of Anna Netrebko
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  date published: 2018-06-29
  track: Gianni Schicchi: O mio babbino caro
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      date published: 2018-06-29
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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: 2026-07-02T03:30:09Z
    audio: Gianni Schicchi: O mio babbino caro
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  track: Non ti scordar di me (Arr. for Soprano, Tenor and Orchestra by Giancarlo Chiaramello)
  track: La traviata: Libiamo ne'lieti calici
  track: Tosca: Vissi d'arte, vissi d'amore
  track: Madama Butterfly: Un bel dì vedremo
  track: Andrea Chénier: La mamma morta
  track: La Bohème: O soave fanciulla
  track: Mefistofele: L'altra notte in fondo al mare
  track: 12 Songs, Op. 21: 7. Zdes′ khorosho (Arr. by Michael Rot)
  track: Cantami
  track: Peer Gynt, Op. 23: Solveig's Song
  track: Idomeneo, re di Creta, K.366: Quando avran fine omai - Padre, germani, addio!
  track: Lakmé: Viens, Mallika, ... Dôme épais (Flower Duet) - Excerpt
  track: Norma: Casta Diva - Excerpt
  track: Les Contes d'Hoffmann: Barcarolle - Excerpt
album: Britten
album: Stravinsky, Janáček, Bartók: Village Stories
album: Martinů: Madrigals
album: Martinů: Cantatas
album: Novák: Testamentum. Choral Works
album: A Ceremony of Carols – This Little Babe
album: Nursery Rhymes
album: What Men Live By
album: Martinů: What Men Live By, Symphony No. 1
album: Fiala: De Amicitia
album: Marketa Lazarová
album: Kabeláč: Symphonies Complete
album: Anna - The Best of Anna Netrebko

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Non ti scordar di me (Arr. for Soprano, Tenor and Orchestra by Giancarlo Chiaramello)
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by artist: Ernesto de Curtis
by artist: Anna Netrebko
by artist: Yusif Eyvazov
by artist: Royal Philharmonic Orchestra
by artist: Jader Bignamini
in album: Diva - The Very Best of Anna Netrebko
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  date published: 2018-06-29
genre: canzone-napoletana
genre: electro-swing
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additional property: OTSVerifyInstructions
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  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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: 2026-07-02T03:55:08Z
audio: Non ti scordar di me (Arr. for Soprano, Tenor and Orchestra by Giancarlo Chiaramello)
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La traviata: Libiamo ne'lieti calici
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by artist: Royal Philharmonic Orchestra
by artist: Jader Bignamini
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genre: classical
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:30:09Z
audio: La traviata: Libiamo ne'lieti calici
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Tosca: Vissi d'arte, vissi d'amore
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:30:09Z
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Madama Butterfly: Un bel dì vedremo
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in album: Diva - The Very Best of Anna Netrebko
  type: MusicAlbum
  date published: 2018-06-29
isrc code: DEN961501900
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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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/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961501900
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
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 0x7498ee4582ede8f1c9d6878a004927c5375fafc354ff35ef3254cd5b7a825c71. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEN961501900.
  date published: 2026-07-02T03:55:08Z
audio: Madama Butterfly: Un bel dì vedremo
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  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
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    value: 0.986
  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
    type: PropertyValue
    value: -20.532
  additional property: Key Name
    type: PropertyValue
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  additional property: Mode Name
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Andrea Chénier: La mamma morta
type: MusicRecording
duration: PT4M59S
duration ms: 299453
explicit: false
by artist: Umberto Giordano
by artist: Anna Netrebko
by artist: Orchestra dell'Accademia Nazionale di Santa Cecilia
by artist: Antonio Pappano
in album: Diva - The Very Best of Anna Netrebko
  type: MusicAlbum
  date published: 2018-06-29
genre: opera
isrc code: DEN961501890
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956891
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961501890
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-06T07:16:32Z
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 0x058767e2fa119eb3b440f795aad3c652a84426f2e7192dce8f2285a51dfdb565. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEN961501890.
  date published: 2026-07-06T07:16:32Z
audio: Andrea Chénier: La mamma morta
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
    type: PropertyValue
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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
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  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
    value: 0.043
  additional property: Acousticness
    type: PropertyValue
    value: 0.986
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.001
  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
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    value: 0.036
  additional property: Loudness (dB)
    type: PropertyValue
    value: -21.331
  additional property: Key Name
    type: PropertyValue
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  additional property: Mode Name
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La Bohème: O soave fanciulla
type: MusicRecording
duration: PT4M12S
duration ms: 252200
explicit: false
by artist: Giacomo Puccini
by artist: Anna Netrebko
by artist: Rolando Villazón
by artist: Boaz Daniel
by artist: Bavarian Radio Symphony Orchestra
by artist: Bertrand de Billy
in album: Diva - The Very Best of Anna Netrebko
  type: MusicAlbum
  date published: 2018-06-29
isrc code: DEN960730311
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-25T17:12:59+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xbbb1ff64ad4b732e94791295396b6fd5db97850cb8a488b1084f3578b5d4e969
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956889
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956889
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960730311
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-06T06:56:49Z
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 0xbbb1ff64ad4b732e94791295396b6fd5db97850cb8a488b1084f3578b5d4e969. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEN960730311.
  date published: 2026-07-06T06:56:49Z
audio: La Bohème: O soave fanciulla
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 69.479
  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: 3
  additional property: Danceability
    type: PropertyValue
    value: 0.146
  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
    type: PropertyValue
    value: 0.947
  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: 0.045
  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
    type: PropertyValue
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  additional property: Mode Name
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Mefistofele: L'altra notte in fondo al mare
type: MusicRecording
duration: PT6M55S
duration ms: 415160
explicit: false
by artist: Arrigo Boito
by artist: Anna Netrebko
by artist: Orchestra dell'Accademia Nazionale di Santa Cecilia
by artist: Antonio Pappano
in album: Diva - The Very Best of Anna Netrebko
  type: MusicAlbum
  date published: 2018-06-29
isrc code: DEN961501930
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1cd4ead649557b37475af0455c2c514b347a64afda62d27933f7057ac7e5e98a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960099
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960099
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961501930
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-29T11:30:20Z
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 0x1cd4ead649557b37475af0455c2c514b347a64afda62d27933f7057ac7e5e98a. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DEN961501930.
  date published: 2026-07-29T11:30:20Z
audio: Mefistofele: L'altra notte in fondo al mare
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
    type: PropertyValue
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  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: 0.257
  additional property: Energy
    type: PropertyValue
    value: 0.051
  additional property: Speechiness
    type: PropertyValue
    value: 0.047
  additional property: Acousticness
    type: PropertyValue
    value: 0.987
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.005
  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
    type: PropertyValue
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  additional property: Mode Name
    type: PropertyValue
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12 Songs, Op. 21: 7. Zdes′ khorosho (Arr. by Michael Rot)
type: MusicRecording
duration: PT2M27S
duration ms: 147240
explicit: false
by artist: Sergei Rachmaninoff
by artist: Anna Netrebko
by artist: Mariinsky Orchestra
by artist: Valery Gergiev
in album: Diva - The Very Best of Anna Netrebko
  type: MusicAlbum
  date published: 2018-06-29
genre: classical
genre: classical-piano
isrc code: DEN960630902
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-25T17:12:51+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5817c745fb22b5ac369d21c8d2a17397fa646bdefd9a9bc2432798d05bae112e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957073
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957073
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960630902
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-07T18:39:05Z
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 0x5817c745fb22b5ac369d21c8d2a17397fa646bdefd9a9bc2432798d05bae112e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEN960630902.
  date published: 2026-07-07T18:39:05Z
audio: 12 Songs, Op. 21: 7. Zdes′ khorosho (Arr. by Michael Rot)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 102.882
  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: 0.192
  additional property: Energy
    type: PropertyValue
    value: 0.101
  additional property: Speechiness
    type: PropertyValue
    value: 0.041
  additional property: Acousticness
    type: PropertyValue
    value: 0.987
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.181
  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.037
  additional property: Loudness (dB)
    type: PropertyValue
    value: -23.935
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Major

Cantami
type: MusicRecording
duration: PT3M44S
duration ms: 224200
explicit: false
by artist: Igor Krutoy
by artist: Anna Netrebko
by artist: Yusif Eyvazov
by artist: Session Orchestra London
by artist: Ben Foster
in album: Diva - The Very Best of Anna Netrebko
  type: MusicAlbum
  date published: 2018-06-29
isrc code: DEN961700290
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-06T18:06:28+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd200dc80cea5d9cfa053b6af970522e74240820738ad57a8e88e4946f80e2c0e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956889
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956889
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961700290
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-06T06:56:49Z
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 0xd200dc80cea5d9cfa053b6af970522e74240820738ad57a8e88e4946f80e2c0e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEN961700290.
  date published: 2026-07-06T06:56:49Z
audio: Cantami
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 104.469
  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: 0.196
  additional property: Energy
    type: PropertyValue
    value: 0.492
  additional property: Speechiness
    type: PropertyValue
    value: 0.048
  additional property: Acousticness
    type: PropertyValue
    value: 0.932
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.1
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.207
  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
    type: PropertyValue
    value: Ab
  additional property: Mode Name
    type: PropertyValue
    value: Major

Peer Gynt, Op. 23: Solveig's Song
type: MusicRecording
duration: PT5M3S
duration ms: 303733
explicit: false
by artist: Edvard Grieg
by artist: Anna Netrebko
by artist: PKF – Prague Philharmonia
by artist: Emmanuel Villaume
in album: Diva - The Very Best of Anna Netrebko
  type: MusicAlbum
  date published: 2018-06-29
genre: classical
genre: late-romantic-era
genre: norwegian-classical
isrc code: DEN960800320
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-19T05:15:38+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3354320c921f9084395bd5d194831b50e031fe0d312f67a1b828f7a5702c213e
additional property: OTSHash
additional property: OTSBitcoinBlock
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  value: 956304
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960800320
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
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 0x3354320c921f9084395bd5d194831b50e031fe0d312f67a1b828f7a5702c213e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEN960800320.
  date published: 2026-07-02T03:55:08Z
audio: Peer Gynt, Op. 23: Solveig's Song
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
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  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.175
  additional property: Energy
    type: PropertyValue
    value: 0.083
  additional property: Speechiness
    type: PropertyValue
    value: 0.054
  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
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Idomeneo, re di Creta, K.366: Quando avran fine omai - Padre, germani, addio!
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by artist: David Aronson
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subject of: OpenTimestamps Proof of Existence
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Lakmé: Viens, Mallika, ... Dôme épais (Flower Duet) - Excerpt
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:30:09Z
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Norma: Casta Diva - Excerpt
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:30:09Z
audio: Norma: Casta Diva - Excerpt
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Les Contes d'Hoffmann: Barcarolle - Excerpt
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by artist: PKF – Prague Philharmonia
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by artist: Prague Philharmonic Choir
by artist: Lukás Vasilek
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-13T12:47:07Z
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Britten
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Stravinsky, Janáček, Bartók: Village Stories
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Martinů: Madrigals
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Martinů: Cantatas
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Novák: Testamentum. Choral Works
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A Ceremony of Carols – This Little Babe
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Nursery Rhymes
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What Men Live By
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date published: 2018-10-12

Martinů: What Men Live By, Symphony No. 1
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Fiala: De Amicitia
type: MusicAlbum
date published: 2014-09-02

Marketa Lazarová
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  by artist: Josef Somr
  by artist: Jana Štěpánková
  by artist: Anna Kratochvilova
  by artist: Kristýna Farag
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  subject of: OpenTimestamps Proof of Existence
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track: Marketa Lazarová: Lazarovo vidění
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  subject of: OpenTimestamps Proof of Existence
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  isrc code: CZB871802003
  additional property: CopyrightID
  additional property: CopyrightStatus
  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: Marketa Lazarová: Na Roháčku
track: Marketa Lazarová: Rajská sonáta
track: Marketa Lazarová: Vlci
track: Marketa Lazarová: Prozření Markety Lazarové
track: Marketa Lazarová: Královský hejtman
track: Marketa Lazarová: Nanebevzetí
track: Marketa Lazarová: Únos

Josef Moravec
type: MusicGroup

Martinů Voices
type: MusicGroup

Baborák Ensemble
type: MusicGroup

Lukás Vasilek
type: MusicGroup

Radek Baborak
type: MusicGroup

Josef Somr
type: MusicGroup

Jana Štěpánková
type: MusicGroup

Anna Kratochvilova
type: MusicGroup

Kristýna Farag
type: MusicGroup

Petr Ostrouchov
type: MusicGroup

Marketa Lazarová
type: MusicAlbum
date published: 2018-11-02

CopyrightID
type: PropertyValue

CopyrightStatus
type: PropertyValue
value: registered

CopyrightRegisteredAt
type: PropertyValue
value: 2026-07-07T18:53:17+00:00

CopyrightChainExplorerURL
type: PropertyValue
value: https://explorer.copyrightchains.com/tx/0x4ec113d6c97a1921c3f0c939175d77b3b843c01c2c4b1da54167c857d4cc0a42

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/CZB871802003

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 0x4ec113d6c97a1921c3f0c939175d77b3b843c01c2c4b1da54167c857d4cc0a42. 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/CZB871802003.
date published: 2026-07-08T03:22:41Z

Marketa Lazarová: Na Roháčku
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 132.041
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: 0.638
additional property: Energy
  type: PropertyValue
  value: 0.101
additional property: Speechiness
  type: PropertyValue
  value: 0.083
additional property: Acousticness
  type: PropertyValue
  value: 0.959
additional property: Instrumentalness
  type: PropertyValue
  value: 0.926
additional property: Liveness
  type: PropertyValue
  value: 0.108
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.065
additional property: Loudness (dB)
  type: PropertyValue
  value: -24.934
additional property: Key Name
  type: PropertyValue
  value: A
additional property: Mode Name
  type: PropertyValue
  value: Major

Marketa Lazarová: Rajská sonáta
type: MusicRecording
duration: PT4M3S
duration ms: 243306
explicit: false
by artist: Zdeněk Liška
by artist: Kateřina Kněžíková
by artist: Josef Moravec
by artist: Martinů Voices
by artist: Baborák Ensemble
by artist: Lukás Vasilek
by artist: Radek Baborak
by artist: Josef Somr
by artist: Jana Štěpánková
by artist: Anna Kratochvilova
by artist: Kristýna Farag
by artist: Petr Ostrouchov
in album: Marketa Lazarová
  type: MusicAlbum
  date published: 2018-11-02
isrc code: CZB871802004
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T16:20:11+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x073b6a6518c84a035b1d8a917bfc2a137fca3f3c28b1089d677d42da6d24cd9d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960435
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960435
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZB871802004
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T16:33:26Z
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 0x073b6a6518c84a035b1d8a917bfc2a137fca3f3c28b1089d677d42da6d24cd9d. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/CZB871802004.
  date published: 2026-07-31T16:33:26Z
audio: Marketa Lazarová: Rajská sonáta
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 104.132
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 6
  additional property: Danceability
    type: PropertyValue
    value: 0.433
  additional property: Energy
    type: PropertyValue
    value: 0.135
  additional property: Speechiness
    type: PropertyValue
    value: 0.03
  additional property: Acousticness
    type: PropertyValue
    value: 0.854
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.973
  additional property: Liveness
    type: PropertyValue
    value: 0.124
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.036
  additional property: Loudness (dB)
    type: PropertyValue
    value: -24.312
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Major

Marketa Lazarová: Vlci
type: MusicRecording
duration: PT3M29S
duration ms: 209560
explicit: false
by artist: Zdeněk Liška
by artist: Kateřina Kněžíková
by artist: Josef Moravec
by artist: Martinů Voices
by artist: Baborák Ensemble
by artist: Lukás Vasilek
by artist: Radek Baborak
by artist: Josef Somr
by artist: Jana Štěpánková
by artist: Anna Kratochvilova
by artist: Kristýna Farag
by artist: Petr Ostrouchov
in album: Marketa Lazarová
  type: MusicAlbum
  date published: 2018-11-02
isrc code: CZB871802005
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T12:53:01+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3872fc0bdc1e0061252fb0dd2837115e2b31eed063f8f8beb56b093bf387d09b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960403
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960403
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZB871802005
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T13:04:34Z
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 0x3872fc0bdc1e0061252fb0dd2837115e2b31eed063f8f8beb56b093bf387d09b. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CZB871802005.
  date published: 2026-07-31T13:04:34Z
audio: Marketa Lazarová: Vlci
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 97.568
  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: 0.134
  additional property: Energy
    type: PropertyValue
    value: 0.045
  additional property: Speechiness
    type: PropertyValue
    value: 0.05
  additional property: Acousticness
    type: PropertyValue
    value: 0.933
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.101
  additional property: Liveness
    type: PropertyValue
    value: 0.112
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.057
  additional property: Loudness (dB)
    type: PropertyValue
    value: -29.451
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Major

Marketa Lazarová: Prozření Markety Lazarové
type: MusicRecording
duration: PT3M48S
duration ms: 228426
explicit: false
by artist: Zdeněk Liška
by artist: Kateřina Kněžíková
by artist: Josef Moravec
by artist: Martinů Voices
by artist: Baborák Ensemble
by artist: Lukás Vasilek
by artist: Radek Baborak
by artist: Josef Somr
by artist: Jana Štěpánková
by artist: Anna Kratochvilova
by artist: Kristýna Farag
by artist: Petr Ostrouchov
in album: Marketa Lazarová
  type: MusicAlbum
  date published: 2018-11-02
isrc code: CZB871802006
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T20:09:35+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x659b53e96a75c3ab36261adad2975d9af16f2972bbe892a3228a15911c25ba72
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/CZB871802006
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 0x659b53e96a75c3ab36261adad2975d9af16f2972bbe892a3228a15911c25ba72. 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/CZB871802006.
  date published: 2026-07-31T20:22:46Z
audio: Marketa Lazarová: Prozření Markety Lazarové
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 114.724
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 6
  additional property: Danceability
    type: PropertyValue
    value: 0.178
  additional property: Energy
    type: PropertyValue
    value: 0.05
  additional property: Speechiness
    type: PropertyValue
    value: 0.041
  additional property: Acousticness
    type: PropertyValue
    value: 0.969
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.001
  additional property: Liveness
    type: PropertyValue
    value: 0.052
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.058
  additional property: Loudness (dB)
    type: PropertyValue
    value: -29.698
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Marketa Lazarová: Královský hejtman
type: MusicRecording
duration: PT6M9S
duration ms: 369880
explicit: false
by artist: Zdeněk Liška
by artist: Kateřina Kněžíková
by artist: Josef Moravec
by artist: Martinů Voices
by artist: Baborák Ensemble
by artist: Lukás Vasilek
by artist: Radek Baborak
by artist: Josef Somr
by artist: Jana Štěpánková
by artist: Anna Kratochvilova
by artist: Kristýna Farag
by artist: Petr Ostrouchov
in album: Marketa Lazarová
  type: MusicAlbum
  date published: 2018-11-02
isrc code: CZB871802007
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T19:00:56+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8f764984989de9594847e55ae42a4b4924ef691e6f62a49ba52568cd7ff48f8f
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/CZB871802007
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 0x8f764984989de9594847e55ae42a4b4924ef691e6f62a49ba52568cd7ff48f8f. 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/CZB871802007.
  date published: 2026-07-31T19:53:13Z
audio: Marketa Lazarová: Královský hejtman
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 134.264
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.398
  additional property: Energy
    type: PropertyValue
    value: 0.251
  additional property: Speechiness
    type: PropertyValue
    value: 0.041
  additional property: Acousticness
    type: PropertyValue
    value: 0.634
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.15
  additional property: Liveness
    type: PropertyValue
    value: 0.128
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.141
  additional property: Loudness (dB)
    type: PropertyValue
    value: -16.919
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Marketa Lazarová: Nanebevzetí
type: MusicRecording
duration: PT4M50S
duration ms: 290440
explicit: false
by artist: Zdeněk Liška
by artist: Kateřina Kněžíková
by artist: Josef Moravec
by artist: Martinů Voices
by artist: Baborák Ensemble
by artist: Lukás Vasilek
by artist: Radek Baborak
by artist: Josef Somr
by artist: Jana Štěpánková
by artist: Anna Kratochvilova
by artist: Kristýna Farag
by artist: Petr Ostrouchov
in album: Marketa Lazarová
  type: MusicAlbum
  date published: 2018-11-02
isrc code: CZB871802008
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T13:55:44+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd64c8b97107aadea7fd7aca58fd6e70ecd81ad18bbb403c083316bc894b0f881
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/CZB871802008
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 0xd64c8b97107aadea7fd7aca58fd6e70ecd81ad18bbb403c083316bc894b0f881. 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/CZB871802008.
  date published: 2026-07-31T15:20:15Z
audio: Marketa Lazarová: Nanebevzetí
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 128.133
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.248
  additional property: Energy
    type: PropertyValue
    value: 0.148
  additional property: Speechiness
    type: PropertyValue
    value: 0.036
  additional property: Acousticness
    type: PropertyValue
    value: 0.502
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.001
  additional property: Liveness
    type: PropertyValue
    value: 0.118
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.043
  additional property: Loudness (dB)
    type: PropertyValue
    value: -24.32
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Marketa Lazarová: Únos
type: MusicRecording
duration: PT2M47S
duration ms: 167040
explicit: false
by artist: Zdeněk Liška
by artist: Kateřina Kněžíková
by artist: Josef Moravec
by artist: Martinů Voices
by artist: Baborák Ensemble
by artist: Lukás Vasilek
by artist: Radek Baborak
by artist: Josef Somr
by artist: Jana Štěpánková
by artist: Anna Kratochvilova
by artist: Kristýna Farag
by artist: Petr Ostrouchov
in album: Marketa Lazarová
  type: MusicAlbum
  date published: 2018-11-02
isrc code: CZB871802009
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T16:58:34+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6850c71964ff200469c42ea5c254ca384012806487bbe45fe8d787271fbb9fe0
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T17:29:52Z
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Kabeláč: Symphonies Complete
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Anna - The Best of Anna Netrebko
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-02T03:55:08Z
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-02T16:51:38Z
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track: Don Giovanni, ossia Il dissoluto punito, K. 527 / Act II: "Là ci darem la mano"
track: Lucia di Lammermoor, Act III: Ardon glI incensi "Mad Scene"
track: Norma / Act 1: Casta Diva - Excerpt
track: Rusalka, Op. 114, B.203 / Act 1: Mesicku na nebi hlubokém
track: La traviata / Act I: "Libiamo ne'lieti calici"
track: Giuditta / Act IV: Meine Lippen, die küssen so heiss
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track: La Bohème / Act 1: "O soave fanciulla"
track: Les Contes d'Hoffmann / Act 2: Barcarolle - Excerpt
track: Peer Gynt, Op. 23: Solveig's song - Excerpt
track: La traviata / Act 3: Addio del passato - Live At Festspielhaus, Salzburg / 2005
track: I Capuleti e i Montecchi, Act I: Oh! quante volte - Bonus Track

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OTSVerifyInstructions
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OpenTimestamps Proof of Existence
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date published: 2026-07-02T03:30:09Z

Lakmé / Act 1: Viens, Mallika, ... Dôme épais (Flower Duet) - Excerpt
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Le nozze di Figaro, K. 492, Act IV: No. 28, Giunse alfin il momento - Deh vieni, non tardar
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subject of: OpenTimestamps Proof of Existence
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Don Giovanni, ossia Il dissoluto punito, K. 527 / Act II: "Là ci darem la mano"
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subject of: OpenTimestamps Proof of Existence
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Lucia di Lammermoor, Act III: Ardon glI incensi "Mad Scene"
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additional property: OTSVerifyInstructions
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  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0x503d9f4ac8925b82e3b2eb4a2fc1c6e9a73e3890834c4a3626eba7d2cb57bfa7. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/DEN960400103.
  date published: 2026-07-22T16:23:52Z
audio: Lucia di Lammermoor, Act III: Ardon glI incensi "Mad Scene"
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  additional property: Key Name
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  additional property: Mode Name
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Norma / Act 1: Casta Diva - Excerpt
type: MusicRecording
duration: PT5M46S
duration ms: 346253
explicit: false
by artist: Vincenzo Bellini
by artist: Anna Netrebko
by artist: SWR Symphony Orchestra
by artist: Marco Armiliato
in album: Anna - The Best of Anna Netrebko
  type: MusicAlbum
  date published: 2009-01-01
genre: opera
isrc code: DEN960730816
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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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/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960730816
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
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 0x3db1855457f830d103133174cb7d46a67aeb0960309f79dafa24e9d3d1b7c02b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEN960730816.
  date published: 2026-07-02T03:55:08Z
audio: Norma / Act 1: Casta Diva - Excerpt
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Rusalka, Op. 114, B.203 / Act 1: Mesicku na nebi hlubokém
type: MusicRecording
duration: PT5M1S
duration ms: 301080
explicit: false
by artist: Antonín Dvořák
by artist: Anna Netrebko
by artist: Wiener Philharmoniker
by artist: Gianandrea Noseda
in album: Anna - The Best of Anna Netrebko
  type: MusicAlbum
  date published: 2009-01-01
genre: classical
genre: late-romantic-era
genre: czech-classical
isrc code: DEN960300069
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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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/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960300069
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
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 0x8138992821835557d071cac7c1115a94a09e82637860560c6ae1fc263b45835f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEN960300069.
  date published: 2026-07-02T03:55:08Z
audio: Rusalka, Op. 114, B.203 / Act 1: Mesicku na nebi hlubokém
  type: AudioObject
  additional property: Tempo (BPM)
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La traviata / Act I: "Libiamo ne'lieti calici"
type: MusicRecording
duration: PT3M5S
duration ms: 185480
explicit: false
by artist: Giuseppe Verdi
by artist: Rolando Villazón
by artist: Anna Netrebko
by artist: Helene Schneiderman
by artist: Herman Wallen
by artist: Salvatore Cordella
by artist: Paul Gay
by artist: Wiener Philharmoniker
by artist: Carlo Rizzi
by artist: Wiener Staatsopernchor
in album: Anna - The Best of Anna Netrebko
  type: MusicAlbum
  date published: 2009-01-01
genre: classical
genre: opera
isrc code: DEN960531303
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960531303
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-06T07:53:57Z
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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ad03b30223b850ae826376f3fd49c88419a340930f06263a38f6de3b408358. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEN960531303.
  date published: 2026-07-06T07:53:57Z
audio: La traviata / Act I: "Libiamo ne'lieti calici"
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Mode (Major/Minor)
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  additional property: Danceability
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  additional property: Energy
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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Giuditta / Act IV: Meine Lippen, die küssen so heiss
type: MusicRecording
duration: PT5M35S
duration ms: 335693
explicit: false
by artist: Franz Lehár
by artist: Anna Netrebko
by artist: PKF – Prague Philharmonia
by artist: Emmanuel Villaume
in album: Anna - The Best of Anna Netrebko
  type: MusicAlbum
  date published: 2009-01-01
genre: opera
isrc code: DEN960800310
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
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/960111
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960800310
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-29T13:21:01Z
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 0x0a4dbb53dc091e87b900974f6003113769492494061dd5e58a222e66be760d5b. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DEN960800310.
  date published: 2026-07-29T13:21:01Z
audio: Giuditta / Act IV: Meine Lippen, die küssen so heiss
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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Don Giovanni, K. 527, Act I: No. 2, Ma qual mai s'offre, o Dei - Fuggi, crudele
type: MusicRecording
duration: PT6M14S
duration ms: 374346
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Anna Netrebko
by artist: Christoph Strehl
by artist: Orchestra Mozart
by artist: Claudio Abbado
in album: Anna - The Best of Anna Netrebko
  type: MusicAlbum
  date published: 2009-01-01
genre: classical
genre: classical-era
isrc code: DEN960500710
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
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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/960185
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960500710
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T01:32:48Z
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 0x3fc2b8546fa1ee1bee08891026b794188ff5f6a1b797229a945ba788fa2afbec. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DEN960500710.
  date published: 2026-07-30T01:32:48Z
audio: Don Giovanni, K. 527, Act I: No. 2, Ma qual mai s'offre, o Dei - Fuggi, crudele
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
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  additional property: Danceability
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  additional property: Energy
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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La Bohème / Act 1: "Sì. Mi chiamano Mimì" - Live
type: MusicRecording
duration: PT5M19S
duration ms: 319480
explicit: false
by artist: Giacomo Puccini
by artist: Anna Netrebko
by artist: Bavarian Radio Symphony Orchestra
by artist: Bertrand de Billy
in album: Anna - The Best of Anna Netrebko
  type: MusicAlbum
  date published: 2009-01-01
isrc code: DEN960730309
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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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/957061
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960730309
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-07T16:07:00Z
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 0x0647d431b6cdffad2b8ecd2cf8b1e4d1039beb77fcd3fbab4d5d0bca98a0d5ea. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEN960730309.
  date published: 2026-07-07T16:07:00Z
audio: La Bohème / Act 1: "Sì. Mi chiamano Mimì" - Live
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Danceability
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  additional property: Acousticness
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  additional property: Loudness (dB)
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La Bohème / Act 1: "O soave fanciulla"
type: MusicRecording
duration: PT4M8S
duration ms: 248026
explicit: false
by artist: Giacomo Puccini
by artist: Anna Netrebko
by artist: Rolando Villazón
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audio: La Bohème / Act 1: "O soave fanciulla"
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Les Contes d'Hoffmann / Act 2: Barcarolle - Excerpt
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subject of: OpenTimestamps Proof of Existence
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Peer Gynt, Op. 23: Solveig's song - Excerpt
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subject of: OpenTimestamps Proof of Existence
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La traviata / Act 3: Addio del passato - Live At Festspielhaus, Salzburg / 2005
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subject of: OpenTimestamps Proof of Existence
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I Capuleti e i Montecchi, Act I: Oh! quante volte - Bonus Track
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