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description: Baron Arthur Grumiaux (; 21 March 1921 – 16 October 1986) was a Belgian violinist, considered by some to have been "one of the few truly great violin virtuosi of the twentieth century". He has been no
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album: Music for Dreaming
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album: Saint-Saëns: Violin Concerto No.3; Vieuxtemps: Violin Concertos Nos.4 & 5
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album: Symphonie Op.20, Poème De L'Amour Et De La Mer, Poème Pour Violon Et Orchestre
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album: George Szell conducts Brahms Piano Concerto No. 2 and Mozart Violin Concerto No. 3 live
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album: Berg: Violin Concerto; Brahms: Tragic Overture; Alto Rhapsody; Kodály: Psalmus Hungaricus
album: Bach: Double Concerto; Erbarme dich; Brahms: Double Concerto (Herman Krebbers Edition, Vol. 6)
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album: David Oistrakh Plays Violin Works by Vivaldi: Concertos Rv 551, 514 / Leclair: Violin Sonata, Op. 9 No. 3 / Mozart: Sinfonia Concertante, K.364
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album: Piano Sonatas
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album: Haydn: Duet for Violin & Cello, Hob. VI:D1 - Ravel: Sonata for Violin & Cello, M. 73
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album: Veracini, Mozart & Schubert: Violin Sonatas
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album: Beethoven, Brahms, Stravinsky & Debussy: Works for Violin & Piano (Live)
album: Pablo Casals Conducts Mozart, Schubert and Beethoven
album: Piano Masterpieces: Clara Haskil Plays Mozart & Beethoven
album: Beethoven & Mozart: Sonatas
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album: Mendelssohn: Violin Concerto, Nathan Milstein vs. Arthur Grumiaux (Compare 2 Versions)
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album: Arthur Grumiaux: The Art of the Violin
album: Telemann: Twelve Fantasias for Violin Solo; Five Violin Concertos
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album: Mozart: Four Flute Quartets; Oboe Quartet; Clarinet Quintet; Schubert: String Quintet
album: French & Belgian Violin Sonatas
album: Arthur Grumiaux: Paganini - Mendelssohn
album: Concerto, No. 1 In D Major for Violin and Orchestra, Op. 6
album: Paganini: Concerto pour violon No. 4 (Mono Version)
album: Schubert: Piano Quintet "The Trout"
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track: Violin Concerto No. 3 in G Major, K. 216: II. Adagio
track: Mélodie from "Orfeo ed Euridice" (Dance of the Blessed Spirits) [Arranged For Violin And Piano]
track: Gypsy Melodies, Op. 55, No. 4 - Songs My Mother Taught Me
track: Violin Romance No. 2 in F, Op. 50
track: "Ellens Gesang III", D839: Ave Maria
track: Schwanengesang, D.957: Ständchen
track: Estrellita

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track: Violin Sonata in A Major K. 526 - I. Allegro molto - Remastered 2021
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value: https://explorer.copyrightchains.com/tx/0x0c78266f07702b8b8b01ff0e8dc5e4ff0a57d6fbb15a9d3e6f234dd730c80ddd

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 957122

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/957122

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH492181466

OTSTimestamp
type: PropertyValue
value: 2026-07-08T03:39:04Z

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 0x0c78266f07702b8b8b01ff0e8dc5e4ff0a57d6fbb15a9d3e6f234dd730c80ddd. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH492181466 — a six-check JSON result.
date published: 2026-07-08T03:39:04Z

Violin Sonata in B flat Major K. 454 - II. Andante - Remastered 2021
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 115.01
additional property: Musical Key
  type: PropertyValue
  value: 3
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 5
additional property: Danceability
  type: PropertyValue
  value: 0.263
additional property: Energy
  type: PropertyValue
  value: 0.13
additional property: Speechiness
  type: PropertyValue
  value: 0.043
additional property: Acousticness
  type: PropertyValue
  value: 0.992
additional property: Instrumentalness
  type: PropertyValue
  value: 0.75
additional property: Liveness
  type: PropertyValue
  value: 0.144
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.104
additional property: Loudness (dB)
  type: PropertyValue
  value: -21.177
additional property: Key Name
  type: PropertyValue
  value: Eb
additional property: Mode Name
  type: PropertyValue
  value: Major

Violin Sonata in B flat Major K. 378 - I. Allegro moderato - Remastered 2021
type: MusicRecording
duration: PT6M1S
duration ms: 361000
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Clara Haskil
by artist: Arthur Grumiaux
in album: Mozart: The Violin Sonatas
  type: MusicAlbum
  date published: 2021-12-06
popularity: 1
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: PLH492181457
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T18:36:09+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x95189001b0f48f7a0e59459f9244c017d8075b31ae1912d1e2a4283463883c0c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960448
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960448
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH492181457
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T18:48:12Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95189001b0f48f7a0e59459f9244c017d8075b31ae1912d1e2a4283463883c0c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH492181457 — a six-check JSON result.
  date published: 2026-07-31T18:48:12Z
audio: Violin Sonata in B flat Major K. 378 - I. Allegro moderato - Remastered 2021
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 139.729
  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: 0.377
  additional property: Energy
    type: PropertyValue
    value: 0.234
  additional property: Speechiness
    type: PropertyValue
    value: 0.04
  additional property: Acousticness
    type: PropertyValue
    value: 0.984
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.574
  additional property: Liveness
    type: PropertyValue
    value: 0.102
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.471
  additional property: Loudness (dB)
    type: PropertyValue
    value: -16.439
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Violin Sonata in B flat Major K. 378 - II. Andantino sostenuto e cantabile - Remastered 2021
type: MusicRecording
duration: PT4M48S
duration ms: 288000
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Clara Haskil
by artist: Arthur Grumiaux
in album: Mozart: The Violin Sonatas
  type: MusicAlbum
  date published: 2021-12-06
popularity: 1
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: PLH492181458
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T23:01:14+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0dbd0a2661747b17af948cc915298e43ccbc59b6bfb25d8558b93104aa1bbfa8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960478
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960478
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH492181458
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T23:30:38Z
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 0x0dbd0a2661747b17af948cc915298e43ccbc59b6bfb25d8558b93104aa1bbfa8. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH492181458 — a six-check JSON result.
  date published: 2026-07-31T23:30:38Z
audio: Violin Sonata in B flat Major K. 378 - II. Andantino sostenuto e cantabile - Remastered 2021
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 114.003
  additional property: Musical Key
    type: PropertyValue
    value: 3
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.244
  additional property: Energy
    type: PropertyValue
    value: 0.07
  additional property: Speechiness
    type: PropertyValue
    value: 0.048
  additional property: Acousticness
    type: PropertyValue
    value: 0.981
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.472
  additional property: Liveness
    type: PropertyValue
    value: 0.122
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.216
  additional property: Loudness (dB)
    type: PropertyValue
    value: -22.011
  additional property: Key Name
    type: PropertyValue
    value: Eb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Violin Sonata in A Major K. 526 - I. Allegro molto - Remastered 2021
type: MusicRecording
duration: PT6M23S
duration ms: 383000
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Clara Haskil
by artist: Arthur Grumiaux
in album: Mozart: The Violin Sonatas
  type: MusicAlbum
  date published: 2021-12-06
popularity: 0
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: PLH492181468
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T23:41:17+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9a25431d517bb353a5e11e8205574bfccfb6de5683dbe6337a5a85675d44a0ba
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960481
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960481
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH492181468
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T23:51:35Z
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 0x9a25431d517bb353a5e11e8205574bfccfb6de5683dbe6337a5a85675d44a0ba. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH492181468 — a six-check JSON result.
  date published: 2026-07-31T23:51:35Z
audio: Violin Sonata in A Major K. 526 - I. Allegro molto - Remastered 2021
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 104.286
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.364
  additional property: Energy
    type: PropertyValue
    value: 0.274
  additional property: Speechiness
    type: PropertyValue
    value: 0.054
  additional property: Acousticness
    type: PropertyValue
    value: 0.99
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.869
  additional property: Liveness
    type: PropertyValue
    value: 0.171
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.557
  additional property: Loudness (dB)
    type: PropertyValue
    value: -17.596
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Major

Violin Sonata in F Major K. 376 - II. Andante - Remastered 2021
type: MusicRecording
duration: PT5M38S
duration ms: 338000
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Clara Haskil
by artist: Arthur Grumiaux
in album: Mozart: The Violin Sonatas
  type: MusicAlbum
  date published: 2021-12-06
popularity: 0
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: PLH492181461
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T16:01:11+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3452d199fefb935ccebeaa30c7f210cdecfeaad93a7ed6a9304433bb1e18117d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960429
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960429
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH492181461
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T16:07:24Z
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 0x3452d199fefb935ccebeaa30c7f210cdecfeaad93a7ed6a9304433bb1e18117d. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH492181461 — a six-check JSON result.
  date published: 2026-07-31T16:07:24Z
audio: Violin Sonata in F Major K. 376 - II. Andante - Remastered 2021
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 118.62
  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: 0.288
  additional property: Energy
    type: PropertyValue
    value: 0.13
  additional property: Speechiness
    type: PropertyValue
    value: 0.04
  additional property: Acousticness
    type: PropertyValue
    value: 0.977
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.185
  additional property: Liveness
    type: PropertyValue
    value: 0.136
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.331
  additional property: Loudness (dB)
    type: PropertyValue
    value: -22.004
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Beethoven: The Violin Sonatas
type: MusicAlbum
date published: 2021-09-22
track: Violin Sonata No.5 in F Major, Op.24 ''Spring'' - I. Allegro - Remastered 2021
  type: MusicRecording
  duration: PT10M15S
  duration ms: 615000
  explicit: false
  by artist: Ludwig van Beethoven
  by artist: Arthur Grumiaux
  by artist: Clara Haskil
  in album: Beethoven: The Violin Sonatas
    type: MusicAlbum
    date published: 2021-09-22
  genre: classical
  genre: classical-piano
  genre: chamber-music
  isrc code: PLH492159568
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-30T21:34:09+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xdb356c34c359830581e800b2175eb83a9bb947dddb436df1088f7d3958d3e2d1
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960321
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960321
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH492159568
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-30T22:27:30Z
  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 0xdb356c34c359830581e800b2175eb83a9bb947dddb436df1088f7d3958d3e2d1. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH492159568 — a six-check JSON result.
    date published: 2026-07-30T22:27:30Z
  audio: Violin Sonata No.5 in F Major, Op.24 ''Spring'' - I. Allegro - Remastered 2021
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 144.995
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.327
    additional property: Energy
      type: PropertyValue
      value: 0.199
    additional property: Speechiness
      type: PropertyValue
      value: 0.038
    additional property: Acousticness
      type: PropertyValue
      value: 0.987
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.714
    additional property: Liveness
      type: PropertyValue
      value: 0.147
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.163
    additional property: Loudness (dB)
      type: PropertyValue
      value: -17.452
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Violin Sonata No.1 in D Major, Op.12 n°1 - I. Allegro con brio - Remastered 2021
  type: MusicRecording
  duration: PT6M35S
  duration ms: 395500
  explicit: false
  by artist: Ludwig van Beethoven
  by artist: Clara Haskil
  by artist: Arthur Grumiaux
  in album: Beethoven: The Violin Sonatas
    type: MusicAlbum
    date published: 2021-09-22
  genre: classical
  genre: classical-piano
  genre: chamber-music
  isrc code: PLH492159556
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-31T10:53:52+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xff6c6bdf5a09edfb5b466680c65d149a9a5ef8366eb65d5439b40d2ebdd1345f
  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/PLH492159556
  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
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Beethoven, Brahms, Stravinsky & Debussy: Works for Violin & Piano (Live)
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Mendelssohn: Violin Concerto, Nathan Milstein vs. Arthur Grumiaux (Compare 2 Versions)
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  additional property: OTSVerifyInstructions
    type: PropertyValue
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-31T03:15:04Z
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track: Violin Concerto No. 2 in D Major, K. 211: III. Rondeau
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    date published: 2013-05-14
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  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
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  subject of: OpenTimestamps Proof of Existence
  audio: Violin Concerto No. 2 in D Major, K. 211: III. Rondeau
track: Violin Concerto No. 5 in A Major, K. 219 'Turkish': I. Allegro aperto
track: Violin Concerto No. 5 in A Major, K. 219 'Turkish': III. Rondo - Tempo di Menuetto

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OTSTimestamp
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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

OpenTimestamps Proof of Existence
type: DigitalDocument
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description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70310d26926890508b1ac35e26a59a94d4c0ffaa6d933b12b785730e280bee7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USV351356077 — a six-check JSON result.
date published: 2026-07-31T05:17:02Z

Violin Concerto No. 2 in D Major, K. 211: III. Rondeau
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Violin Concerto No. 5 in A Major, K. 219 'Turkish': I. Allegro aperto
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explicit: false
by artist: Arthur Grumiaux
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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  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 0x6435fa29cf585b18571d692a6d58bcce3dbafd7a799cb8409cb9d78590f97d4b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USV351356084 — a six-check JSON result.
  date published: 2026-07-02T03:55:08Z
audio: Violin Concerto No. 5 in A Major, K. 219 'Turkish': I. Allegro aperto
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Violin Concerto No. 5 in A Major, K. 219 'Turkish': III. Rondo - Tempo di Menuetto
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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  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: 2026-07-30T17:23:26Z
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Telemann: Twelve Fantasias for Violin Solo; Five Violin Concertos
type: MusicAlbum
date published: 2013-01-01

Mozart: Violin Sonata in E Flat; Brahms: Violin Sonata No.2 in A; Grieg: Violin Sonata No.3
type: MusicAlbum
date published: 2013-01-01

Mozart: Four Flute Quartets; Oboe Quartet; Clarinet Quintet; Schubert: String Quintet
type: MusicAlbum
date published: 2013-01-01
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  by artist: Grumiaux Trio
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    date published: 2013-01-01
  genre: classical
  genre: classical-era
  genre: classical-piano
  genre: opera
  genre: chamber-music
  genre: concerto
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  additional property: OTSVerificationAPI
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  additional property: OTSTimestamp
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  additional property: OTSVerifyInstructions
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    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 0x6e2677c2bf55c21439770ab60778fa0f1beb9b383efb66cdcb7232cee7d406c6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506900191 — a six-check JSON result.
    date published: 2026-07-08T03:20:19Z
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track: Clarinet Quintet in A, K.581: 2. Larghetto
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  additional property: OTSVerificationAPI
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  additional property: OTSTimestamp
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  additional property: OTSVerifyInstructions
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  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d06fb2a5f070aabeb7310b73fac30431fc296178e9bc0a083c33d008035abe1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA507400610 — a six-check JSON result.
    date published: 2026-07-30T21:35:24Z
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    date published: 2013-01-01
  genre: classical
  genre: classical-era
  genre: classical-piano
  genre: opera
  genre: chamber-music
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  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: Flute Quartet in A, K.298: 2. Menuetto
track: Flute Quartet No. 2 in G, K.285a: 1. Andante

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OTSHash
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OTSBitcoinBlock
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OTSBitcoinBlockVerifyURL
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OTSVerificationAPI
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OTSTimestamp
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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
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description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f983fd413e8e7cf87f245c855be831619598d692cf484d39bed18308a629b2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506900194 — a six-check JSON result.
date published: 2026-07-31T15:20:15Z

Flute Quartet in A, K.298: 2. Menuetto
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Flute Quartet No. 2 in G, K.285a: 1. Andante
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duration: PT6M10S
duration ms: 370693
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: William Bennett
by artist: Grumiaux Trio
in album: Mozart: Four Flute Quartets; Oboe Quartet; Clarinet Quintet; Schubert: String Quintet
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  date published: 2013-01-01
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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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 0xf7af49d091501a9cffbd64ea74453bddd5f5c09b4d752bf256acb09ce6df842f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506900198 — a six-check JSON result.
  date published: 2026-07-31T15:20:15Z
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French & Belgian Violin Sonatas
type: MusicAlbum
date published: 2013-01-01

Arthur Grumiaux: Paganini - Mendelssohn
type: MusicAlbum
date published: 2006-07-13
track: Concierto No.4 para Violín en Re Menor Op.31: II. Adagio Flebile con Sentimento
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  by artist: Arthur Grumiaux
  by artist: Franco Gallini
  by artist: Orchestre des Concerts Lamoureux
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    date published: 2006-07-13
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  additional property: OTSVerificationAPI
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  additional property: OTSTimestamp
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  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
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    date published: 2026-07-30T17:23:26Z
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Mozart: Violin Concertos Nos. 3, 4 & 5
type: MusicAlbum
date published: 2018-03-02

Concerto, No. 1 In D Major for Violin and Orchestra, Op. 6
type: MusicAlbum
date published: 2024-11-15

Paganini: Concerto pour violon No. 4 (Mono Version)
type: MusicAlbum
date published: 1961-01-01

Paganini: Concerto pour violon No. 4 (Mono Version)
type: MusicAlbum
date published: 1955-01-01

Paganini: Concerto pour violon No. 4 (Mono Version)
type: MusicAlbum
date published: 1955-01-01

Schubert: Piano Quintet "The Trout"
type: MusicAlbum
date published: 1967-01-01

Liebesfreud
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duration: PT3M23S
duration ms: 203000
explicit: false
by artist: Fritz Kreisler
by artist: Arthur Grumiaux
by artist: Istvan Hajdu
in album: 100 Classical Favourites
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  date published: 1998-01-01
popularity: 10
genre: classical
genre: post-romantic-era
genre: violin
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additional property: OTSTimestamp
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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
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  date published: 2026-07-22T18:47:29Z
audio: Liebesfreud
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Violin Concerto No. 3 in G Major, K. 216: II. Adagio
type: MusicRecording
duration: PT7M36S
duration ms: 456453
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Arthur Grumiaux
by artist: London Symphony Orchestra
by artist: Sir Colin Davis
in album: Violin Adagios
  type: MusicAlbum
  date published: 2001-01-01
popularity: 3
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: NLA506100002
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
  type: PropertyValue
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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 0xbf1a3226ad56ed233be3f129524cb1547aff7bb77c6f0127b25e028f218ebb71. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506100002 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
audio: Violin Concerto No. 3 in G Major, K. 216: II. Adagio
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Mélodie from "Orfeo ed Euridice" (Dance of the Blessed Spirits) [Arranged For Violin And Piano]
type: MusicRecording
duration: PT2M44S
duration ms: 164213
explicit: false
by artist: Christoph Willibald Gluck
by artist: Arthur Grumiaux
by artist: Istvan Hajdu
in album: Violin Adagios
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popularity: 2
genre: classical
genre: opera
isrc code: NLA507200923
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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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 0x5aae6d9e25e78890ab80861c643295d3382f5593177b53bf847aa2dafd0524e6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA507200923 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
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Gypsy Melodies, Op. 55, No. 4 - Songs My Mother Taught Me
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duration: PT2M8S
duration ms: 128493
explicit: false
by artist: Antonín Dvořák
by artist: Arthur Grumiaux
by artist: Istvan Hajdu
in album: Violin Adagios
  type: MusicAlbum
  date published: 2001-01-01
popularity: 2
genre: classical
genre: late-romantic-era
genre: czech-classical
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additional property: CopyrightID
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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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 0x5a07b126dfb23d51b8a68174f36427fd8a1d9e4cf22b565f2c76959ed9c84bd4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA507200951 — a six-check JSON result.
  date published: 2026-07-31T02:19:15Z
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Violin Romance No. 2 in F, Op. 50
type: MusicRecording
duration: PT7M51S
duration ms: 471066
explicit: false
by artist: Ludwig van Beethoven
by artist: Arthur Grumiaux
by artist: Royal Concertgebouw Orchestra
by artist: Bernard Haitink
in album: Violin Adagios
  type: MusicAlbum
  date published: 2001-01-01
popularity: 2
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLA506000137
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/957120
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506000137
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:22:41Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f4b4d87d738fcb6dc442a040a0b622751b1a06b742a623453b9b84d4ce0e13. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506000137 — a six-check JSON result.
  date published: 2026-07-08T03:22:41Z
audio: Violin Romance No. 2 in F, Op. 50
  type: AudioObject
  additional property: Tempo (BPM)
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    value: 133.854
  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.307
  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
    type: PropertyValue
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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  additional property: Key Name
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"Ellens Gesang III", D839: Ave Maria
type: MusicRecording
duration: PT4M14S
duration ms: 254373
explicit: false
by artist: Franz Schubert
by artist: Arthur Grumiaux
by artist: Istvan Hajdu
in album: Violin Adagios
  type: MusicAlbum
  date published: 2001-01-01
popularity: 2
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLA507200931
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
  type: PropertyValue
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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/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA507200931
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 0x8f145aef721c7b387836962c2992c353e8a8aa37479e679d1f1e3df8b87d16db. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA507200931 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
audio: "Ellens Gesang III", D839: Ave Maria
  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: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.249
  additional property: Energy
    type: PropertyValue
    value: 0.063
  additional property: Speechiness
    type: PropertyValue
    value: 0.05
  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)
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  additional property: Loudness (dB)
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  additional property: Key Name
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  additional property: Mode Name
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Schwanengesang, D.957: Ständchen
type: MusicRecording
duration: PT2M39S
duration ms: 159186
explicit: false
by artist: Franz Schubert
by artist: Arthur Grumiaux
by artist: Istvan Hajdu
in album: Violin Adagios
  type: MusicAlbum
  date published: 2001-01-01
popularity: 2
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLA507200945
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x20894d9eab2247fa2547d394e3ac9190b5520a9e57d1b890db3a9a23f679c3f7
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960277
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960277
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA507200945
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T16:10:47Z
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 0x20894d9eab2247fa2547d394e3ac9190b5520a9e57d1b890db3a9a23f679c3f7. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA507200945 — a six-check JSON result.
  date published: 2026-07-30T16:10:47Z
audio: Schwanengesang, D.957: Ständchen
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.262
  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
    value: 0.044
  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)
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    value: 0.118
  additional property: Loudness (dB)
    type: PropertyValue
    value: -28.087
  additional property: Key Name
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  additional property: Mode Name
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Estrellita
type: MusicRecording
duration: PT3M3S
duration ms: 183960
explicit: false
by artist: Manuel Ponce
by artist: Arthur Grumiaux
by artist: Istvan Hajdu
in album: Violin Adagios
  type: MusicAlbum
  date published: 2001-01-01
popularity: 2
isrc code: NLA507200942
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x474150c462ee2b99b9e872fc0f2bcc0b6d60806e9079fa638ef0d4f66f28764a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960404
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960404
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA507200942
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T13:06:57Z
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 0x474150c462ee2b99b9e872fc0f2bcc0b6d60806e9079fa638ef0d4f66f28764a. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA507200942 — a six-check JSON result.
  date published: 2026-07-31T13:06:57Z
audio: Estrellita
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
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  additional property: Musical Key
    type: PropertyValue
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  additional property: Mode (Major/Minor)
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    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
    value: 0.048
  additional property: Acousticness
    type: PropertyValue
    value: 0.967
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.413
  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
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  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
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  additional property: Mode Name
    type: PropertyValue
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Gypsy Melodies, Op. 55, No. 4 - Songs My Mother Taught Me
type: MusicRecording
duration: PT2M8S
duration ms: 128440
explicit: false
by artist: Antonín Dvořák
by artist: Arthur Grumiaux
by artist: Istvan Hajdu
in album: 101 Adagios
  type: MusicAlbum
  date published: 2012-01-01
popularity: 1
genre: classical
genre: late-romantic-era
genre: czech-classical
isrc code: NLA507200951
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5a07b126dfb23d51b8a68174f36427fd8a1d9e4cf22b565f2c76959ed9c84bd4
additional property: OTSHash
additional property: OTSBitcoinBlock
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  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/NLA507200951
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 0x5a07b126dfb23d51b8a68174f36427fd8a1d9e4cf22b565f2c76959ed9c84bd4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA507200951 — a six-check JSON result.
  date published: 2026-07-31T15:20:15Z
audio: Gypsy Melodies, Op. 55, No. 4 - Songs My Mother Taught Me
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 117.937
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
    value: 0.061
  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: 0.076
  additional property: Loudness (dB)
    type: PropertyValue
    value: -24.39
  additional property: Key Name
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  additional property: Mode Name
    type: PropertyValue
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