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description: Marianne Thorsen (born 13 March 1972) is a Norwegian violinist. Biography and career Born in Trondheim, Thorsen was taught by Bjarne Fiskum before studying at The Purcell School for Young Musicians i
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album: Henning Sommerro: BORDERS
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album: Halvorsen: Orchestral Works, Vol. 1
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Piano Quintet in G Minor, Op. 8: III. Scherzo. Presto
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  additional property: OTSVerificationAPI
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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
  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T03:20:19Z
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Vaughan Williams: Early Chamber Music
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2L — The Nordic Sound
type: MusicAlbum
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  additional property: OTSVerifyInstructions
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T03:22:41Z
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  additional property: OTSVerifyInstructions
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T08:56:20Z
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  subject of: OpenTimestamps Proof of Existence
  audio: Recitative And Aria From Cantata Rv 679, Che Giova Il Sospirar, Povero Core
track: String Quartet In D, Op. 76, No. 5 - Finale - Presto

OTSHash
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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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb239e643cc737a1ae018fd499aaca0478f3e9d92960498de1161300ce0551b1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NOMPP0808010.
date published: 2026-07-08T08:56:20Z

Recitative And Aria From Cantata Rv 679, Che Giova Il Sospirar, Povero Core
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String Quartet In D, Op. 76, No. 5 - Finale - Presto
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by artist: The Engegård Quartet
by artist: 2L audiophile reference recordings
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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
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  date published: 2026-07-08T03:20:19Z
audio: String Quartet In D, Op. 76, No. 5 - Finale - Presto
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Henning Sommerro: BORDERS
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T03:20:19Z
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Ståle Kleiberg: Concertos
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Treble & Bass - Kleiberg Concertos
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date published: 2009-05-19

2L — The MQA Experience
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-07T18:39:05Z
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Halvorsen: Orchestral Works, Vol. 3
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Halvorsen: Orchestral Works, Vol. 2
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Halvorsen: Orchestral Works, Vol. 1
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date published: 2010-03-01

Halvorsen: Orchestral Works
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track: Mascarade Suite: III. Menuetto. Introduktion ad lib
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track: Three Norwegian Dances: I. Allegro con brio - Molto tranquillo
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track: Mascarade Suite: VI. Molinasque (Grotesk dans). Allegro moderato
track: Symphony No. 2, "Fatum": I. Allegro moderato - Più mosso sempre
track: Fossegrimen, Op. 21: IV. Melodrame og Auds Sang. Allegro
track: La Mélancolie

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Three Norwegian Dances: I. Allegro con brio - Molto tranquillo
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Mascarade Suite: VI. Molinasque (Grotesk dans). Allegro moderato
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Symphony No. 2, "Fatum": I. Allegro moderato - Più mosso sempre
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Fossegrimen, Op. 21: IV. Melodrame og Auds Sang. Allegro
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La Mélancolie
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OpenTimestamps Proof of Existence
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date published: 2026-07-02T03:55:08Z

Saeterjentens Sondag
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    date published: 2026-07-08T03:20:19Z
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OpenTimestamps Proof of Existence
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    date published: 2026-07-08T03:20:19Z
  audio: MOZART Violin Concerto in D major KV 218, I. Allegro - MQA remix 2016
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Diverse Komposisjoner
type: MusicAlbum
date published: 2000-11-28

Terje Bjørklund: Music for Strings
type: MusicAlbum
date published: 1997

Violin Recital
type: MusicAlbum
date published: 1992
track: Romance, G Major, Op.26
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  duration: PT7M16S
  duration ms: 436009
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  by artist: Johan Svendsen
  by artist: Marianne Thorsen
  by artist: Jørgen Larsen
  in album: Violin Recital
    type: MusicAlbum
    date published: 1992
  genre: late-romantic-era
  genre: norwegian-classical
  isrc code: NOFZS9007100
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    value: 957118
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOFZS9007100
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
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    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b808610c3fc523d88831c3679688f1fc8bef515c861e202df8678323e81aa79. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOFZS9007100.
    date published: 2026-07-08T03:20:19Z
  audio: Romance, G Major, Op.26
    type: AudioObject
    additional property: Tempo (BPM)
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      value: 166.517
    additional property: Musical Key
      type: PropertyValue
      value: 7
    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
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    additional property: Speechiness
      type: PropertyValue
      value: 0.05
    additional property: Acousticness
      type: PropertyValue
      value: 0.937
    additional property: Instrumentalness
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    additional property: Liveness
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    additional property: Loudness (dB)
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      value: -27.068
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Sonata No. 3 in D Major, TWV 40: 120: I. Spirituoso
type: MusicAlbum
date published: 2022-07-29

Herrmann, Gershwin, Waxman & Copland: American Chamber Music
type: MusicAlbum
date published: 2015-05-31

Songs by Schubert's Friends & Contemporaries
type: MusicAlbum
date published: 2006-03-01
track: Erlkönig
  type: MusicRecording
  duration: PT1M37S
  duration ms: 97133
  explicit: false
  by artist: Johann Friedrich Reichardt
  by artist: Gerald Finley
  by artist: Graham Johnson
  in album: Songs by Schubert's Friends & Contemporaries
    type: MusicAlbum
    date published: 2006-03-01
  popularity: 0
  isrc code: GBAJY0605104
  additional property: CopyrightID
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    value: registered
  additional property: CopyrightRegisteredAt
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    value: 2026-07-07T14:31:38+00:00
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    value: https://explorer.copyrightchains.com/tx/0x8ccaeca56446356cf1befdf1db5ae866f0d8f12e3a61f4c50cf20e56fd87f3e7
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    value: 957145
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  additional property: OTSVerificationAPI
    type: PropertyValue
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  additional property: OTSTimestamp
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    value: 2026-07-08T08:56:20Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccaeca56446356cf1befdf1db5ae866f0d8f12e3a61f4c50cf20e56fd87f3e7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAJY0605104.
    date published: 2026-07-08T08:56:20Z
  audio: Erlkönig
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 114.823
    additional property: Musical Key
      type: PropertyValue
      value: 7
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      value: 0
    additional property: Time Signature
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    additional property: Danceability
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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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    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)
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Canons
type: MusicAlbum
date published: 2022-10-07
track: Dona nobis pacem (Arr. for string trio by Maya Magub)
  type: MusicRecording
  duration: PT1M47S
  duration ms: 107053
  explicit: false
  by artist: Wolfgang Amadeus Mozart
  by artist: Maya Magub
  by artist: Jonathan Moerschel
  by artist: Richard Harwood
  in album: Canons
    type: MusicAlbum
    date published: 2022-10-07
  genre: classical
  genre: classical-era
  isrc code: GBBGK2254230
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    value: registered
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    value: 2026-07-06T21:50:52+00:00
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    value: https://explorer.copyrightchains.com/tx/0x8e02192e6a812fb65cce456b77849a67eae01a2bdbdb009450b80682f5dea539
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    value: 957120
  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/GBBGK2254230
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e02192e6a812fb65cce456b77849a67eae01a2bdbdb009450b80682f5dea539. 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/GBBGK2254230.
    date published: 2026-07-08T03:22:41Z
  audio: Dona nobis pacem (Arr. for string trio by Maya Magub)
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 148.034
    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: 0.176
    additional property: Energy
      type: PropertyValue
      value: 0.053
    additional property: Speechiness
      type: PropertyValue
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    additional property: Acousticness
      type: PropertyValue
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    additional property: Instrumentalness
      type: PropertyValue
      value: 0.307
    additional property: Liveness
      type: PropertyValue
      value: 0.074
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.246
    additional property: Loudness (dB)
      type: PropertyValue
      value: -20.333
    additional property: Key Name
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      value: F
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      value: Major

Walton: Chamber Music – Violin Sonata; Piano Quartet; Anon in Love etc.
type: MusicAlbum
date published: 2002-09-01

Turina: Chamber Music
type: MusicAlbum
date published: 2012-03-23

Menotti: Chamber Works
type: MusicAlbum
date published: 2010-05-03

Mozart: Divertimento for String Trio; Duo for Violin & Viola No. 2
type: MusicAlbum
date published: 2001-09-01

James MacMillan: Kiss On Wood
type: MusicAlbum
date published: 2000-01-01