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genre: dutch-baroque
description: thumb|Willem de Fesch Willem de Fesch (; 1687 in Alkmaar – 3 January 1761) was a virtuoso Dutch violinist and composer. The pupil of Karel Rosier, who was a Vice-Kapellmeister at Bonn, de Fesch late
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  track: Concerto Grosso III in F Major, Op. 3: II. Allegro
  track: Concerto Grosso IV in E-Flat Major, Op. 3: II. Alle Breve
  track: Concerto Grosso V in D Major, Op. 3: I. Largo
  track: Concerto Grosso V in D Major, Op. 3: V. March
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album: De Fesch: Joseph
album: Teleman, Loeillet & Others: Recorder Works
album: Han de Vries: The Almost Last Recordings
album: A Cavalier's Tour (Through Baroque Europe)
album: Een Muzikale Anthologie Der Noordelijke Nederlanden
album: A Musical Anthology of the Northern Netherlands
album: Orpheus with His Lute: Music for Shakespeare from Purcell to Arne (English Orpheus 50)
album: Willem De Fesch: VI Concerti Opera Quinta
album: Vintage 1996 Music from Holland
album: The Cello in Baroque Italy
album: Cello Music - Gabrielli, D. / Bononcini, G. / Scarlatti, A. / Fesch, W.
album: Willem de Fesch: Concerti Grossi & Violin Concertos
album: Willem de Fesch: Seis Sonatas para Violoncello y Clavecín
album: Ellipses
album: The Cavalry Trot
album: Colegium Musicum Iribarren
album: Music for the Moment: Classical Relaxation
album: プログレッシブ・デュオ
album: Trombone & Organ
album: Music from the Netherlands
album: The Prince of Wales' Concert
album: Vignettes for Violin
album: Unico
album: The Noske Family (Sonata da Camera)
album: à Amsterdam
album: Willem Noske (Violinist & Collector)
album: Amazing Duo II: The Berlin Philharmonic Duo
album: A Breath of New Life
album: Have Cellos, Will Travel
album: Lully, De Fesch, Mozart, Bach, Rameau, Rosenmüller, Viviani, Vitali: Airs de trompette (17th and 18th Century Music for Trumpet, Trombone and Organ)
album: Flute Music from the Netherlands
album: Barockmusik (Mono Version)
album: Flirt im Rokoko
album: Express
album: Theo, Willem, Herman & Friends
album: Perles de cithare
album: Barocksonaten Remastered
album: Concert pour deux violoncelles (Mono Version)
album: Passion & Craftsmanship

Cello Sonata in A Minor, Op. 13 No. 6: II. Alla breve
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Cello Sonata in A Minor, Op. 13 No. 6: III. Allegro
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Cello Sonata in A Minor, Op. 13 No. 6: I. Larghetto
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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

Concerto Grosso in C Major, Op. 3: No. 1
type: MusicRecording
duration: PT7M54S
duration ms: 474360
explicit: false
by artist: Willem de Fesch
by artist: La Sfera Armoniosa
by artist: Mike Fentross
by artist: Lidewij van der Voort
in album: Willem de Fesch: Concerti Grossi & Violin Concertos
  type: MusicAlbum
  date published: 2021-01-08
genre: dutch-baroque
isrc code: NLB152000283
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLB152000283
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19+00:00
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
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad2f4b8e7c876b8310ba0d5ed68b697fbeeae9e763b9a09ccca22436ea90616. 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/NLB152000283.
  date published: 2026-07-08T08:56:20Z
audio: Concerto Grosso in C Major, Op. 3: No. 1
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Concerto Grosso in D Major, Op. 10: No. 4
type: MusicRecording
duration: PT12M52S
duration ms: 772800
explicit: false
by artist: Willem de Fesch
by artist: La Sfera Armoniosa
by artist: Mike Fentross
by artist: Lidewij van der Voort
in album: Willem de Fesch: Concerti Grossi & Violin Concertos
  type: MusicAlbum
  date published: 2021-01-08
genre: dutch-baroque
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5338ed2e6adc5b898b209626dbd613472a71f7d84db1ba1f0bdf6f8ec7937a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLB152000282.
  date published: 2026-07-31T00:26:26Z
audio: Concerto Grosso in D Major, Op. 10: No. 4
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isrc code: NLB152000282
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
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additional property: OTSVerificationAPI
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additional property: OTSBitcoinBlockVerifyURL
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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

Concerto Grosso in E Minor, Op. 3: No. 5
type: MusicRecording
duration: PT6M59S
duration ms: 419493
explicit: false
by artist: Willem de Fesch
by artist: La Sfera Armoniosa
by artist: Mike Fentross
by artist: Lidewij van der Voort
in album: Willem de Fesch: Concerti Grossi & Violin Concertos
  type: MusicAlbum
  date published: 2021-01-08
genre: dutch-baroque
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bf07698f367c4772811499318f8d7077509c465ba7989f0d53a452baf74889. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLB152000284.
  date published: 2026-07-31T13:26:30Z
audio: Concerto Grosso in E Minor, Op. 3: No. 5
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Danceability
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isrc code: NLB152000284
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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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

Violin Concerto in C Minor, Op. 5: No. 5
type: MusicRecording
duration: PT9M25S
duration ms: 565120
explicit: false
by artist: Willem de Fesch
by artist: La Sfera Armoniosa
by artist: Mike Fentross
by artist: Lidewij van der Voort
in album: Willem de Fesch: Concerti Grossi & Violin Concertos
  type: MusicAlbum
  date published: 2021-01-08
genre: dutch-baroque
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1d1fbb7c436c774d044399501094fa78c54435436f3f6a8f57a45f44ba72ed. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLB152000285.
  date published: 2026-07-31T19:53:13Z
audio: Violin Concerto in C Minor, Op. 5: No. 5
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  additional property: Time Signature
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  additional property: Danceability
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  additional property: Energy
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  additional property: Acousticness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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isrc code: NLB152000285
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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additional property: ContentHash
additional property: BitcoinBlock
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additional property: BitcoinTime
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additional property: OTSVerificationAPI
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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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

Sonata II en Sol Bemol: Mayor: Vivace
type: MusicRecording
duration: PT3M40S
duration ms: 220960
explicit: false
by artist: Willem de Fesch
by artist: Claudio Casadei
by artist: Francesco Tasini
in album: Willem de Fesch: Seis Sonatas para Violoncello y Clavecín
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  date published: 2012-03-01
genre: dutch-baroque
isrc code: MX2831301992
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additional property: CopyrightStatus
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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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
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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additional property: ContentHash
additional property: BitcoinBlock
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:53:27Z
audio: Sonata II en Sol Bemol: Mayor: Vivace
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Sicilienne pour violoncelle baroque et clavecin
type: MusicRecording
duration: PT1M30S
duration ms: 90933
explicit: false
by artist: Willem de Fesch
by artist: Anastasia Kobekina
by artist: Emmanuel Arakélian
in album: Ellipses
  type: MusicAlbum
  date published: 2022-06-10
popularity: 8
genre: dutch-baroque
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-22T15:43:44Z
audio: Sicilienne pour violoncelle baroque et clavecin
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additional property: CopyrightID
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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Valence (Positivity)
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Loudness (dB)
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Key Name
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Mode Name
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Concerto Grosso III in F Major, Op. 3: II. Allegro
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duration: PT2M1S
duration ms: 121040
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by artist: Combattimento Consort Amsterdam
by artist: Jan Willem de Vriend
in album: Baroque Concerti from The Netherlands
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fc9304be78982f2bfd406d19cde56a71656a9636947d8473a420e4a345b4cc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332100555.
  date published: 2026-07-08T03:53:27Z
audio: Concerto Grosso III in F Major, Op. 3: II. Allegro
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
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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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Concerto Grosso IV in E-Flat Major, Op. 3: II. Alle Breve
type: MusicRecording
duration: PT1M36S
duration ms: 96533
explicit: false
by artist: Pieter Hellendaal
by artist: Combattimento Consort Amsterdam
by artist: Jan Willem de Vriend
in album: Baroque Concerti from The Netherlands
  type: MusicAlbum
  date published: 2021-03-26
isrc code: NLY332100560
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332100560
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:53:27Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92b14af14729b9a6611506d9a457950698b9854a132b462614bafde8817d105. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332100560.
  date published: 2026-07-08T03:53:27Z
audio: Concerto Grosso IV in E-Flat Major, Op. 3: II. Alle Breve
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  additional property: Mode (Major/Minor)
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    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.321
  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
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  additional property: Instrumentalness
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Concerto Grosso V in D Major, Op. 3: I. Largo
type: MusicRecording
duration: PT3M33S
duration ms: 213773
explicit: false
by artist: Pieter Hellendaal
by artist: Combattimento Consort Amsterdam
by artist: Jan Willem de Vriend
in album: Baroque Concerti from The Netherlands
  type: MusicAlbum
  date published: 2021-03-26
isrc code: NLY332100564
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
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332100564
additional property: OTSTimestamp
  type: PropertyValue
  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 0x00ebe16a770de8dc9043daecafd8b7933d84b9d17ea975ecb6fe73caa5d1b2ed. 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/NLY332100564.
  date published: 2026-07-08T08:56:20Z
audio: Concerto Grosso V in D Major, Op. 3: I. Largo
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.264
  additional property: Energy
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    value: 0.008
  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
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Concerto Grosso V in D Major, Op. 3: V. March
type: MusicRecording
duration: PT2M33S
duration ms: 153626
explicit: false
by artist: Pieter Hellendaal
by artist: Combattimento Consort Amsterdam
by artist: Jan Willem de Vriend
in album: Baroque Concerti from The Netherlands
  type: MusicAlbum
  date published: 2021-03-26
isrc code: NLY332100568
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
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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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b454f9f92fdadd16ef4f8ec10e156429323dfc673f414553bff945ab658349. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332100568.
  date published: 2026-07-08T03:53:27Z
audio: Concerto Grosso V in D Major, Op. 3: V. March
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
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  additional property: Danceability
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  additional property: Energy
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  additional property: Acousticness
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  additional property: Valence (Positivity)
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Concerto Grosso Vi in F Major, Op. 3: I. Largo
type: MusicRecording
duration: PT1M26S
duration ms: 86400
explicit: false
by artist: Pieter Hellendaal
by artist: Combattimento Consort Amsterdam
by artist: Jan Willem de Vriend
in album: Baroque Concerti from The Netherlands
  type: MusicAlbum
  date published: 2021-03-26
isrc code: NLY332100569
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
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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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2178c084f4f8d87d5db88ff89c331aed25dfb56aa737845bbd0097087ace8cb0. 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/NLY332100569.
  date published: 2026-07-08T03:22:41Z
audio: Concerto Grosso Vi in F Major, Op. 3: I. Largo
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
    type: PropertyValue
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.337
  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
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  additional property: Acousticness
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Concerto Grosso Vi in F Major, Op. 3: III. Adagio
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duration: PT2M28S
duration ms: 148573
explicit: false
by artist: Pieter Hellendaal
by artist: Combattimento Consort Amsterdam
by artist: Jan Willem de Vriend
in album: Baroque Concerti from The Netherlands
  type: MusicAlbum
  date published: 2021-03-26
isrc code: NLY332100571
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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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
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
  type: PropertyValue
  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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbfd5cacde62e054e637f322e171d2d5bb6a6b3b17a1483b184c66283e2e937. 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/NLY332100571.
  date published: 2026-07-08T08:56:20Z
audio: Concerto Grosso Vi in F Major, Op. 3: III. Adagio
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: 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: Valence (Positivity)
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Concerto II in B-Flat Major: II. Da Capella. Presto
type: MusicRecording
duration: PT1M37S
duration ms: 97693
explicit: false
by artist: Unico Wilhelm van Wassenaer
by artist: Combattimento Consort Amsterdam
by artist: Jan Willem de Vriend
in album: Baroque Concerti from The Netherlands
  type: MusicAlbum
  date published: 2021-03-26
genre: baroque
genre: dutch-baroque
isrc code: NLY332100578
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
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additional property: OTSVerificationAPI
  type: PropertyValue
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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
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bb22c3f83e7bc550aaaaf52cf97030be6f70d91a58486ac8432284befa9875. 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/NLY332100578.
  date published: 2026-07-08T08:56:20Z
audio: Concerto II in B-Flat Major: II. Da Capella. Presto
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  additional property: Danceability
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Concerto II in B-Flat Major: III. Largo Affettuoso
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duration: PT2M10S
duration ms: 130399
explicit: false
by artist: Unico Wilhelm van Wassenaer
by artist: Combattimento Consort Amsterdam
by artist: Jan Willem de Vriend
in album: Baroque Concerti from The Netherlands
  type: MusicAlbum
  date published: 2021-03-26
genre: baroque
genre: dutch-baroque
isrc code: NLY332100579
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5499f0dd24ea2684226e7c753b2ee42533190647b98b7ba7730492a3814dee21. 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/NLY332100579.
  date published: 2026-07-08T03:22:41Z
audio: Concerto II in B-Flat Major: III. Largo Affettuoso
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.145
  additional property: Energy
    type: PropertyValue
    value: 0.061
  additional property: Speechiness
    type: PropertyValue
    value: 0.042
  additional property: Acousticness
    type: PropertyValue
    value: 0.744
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.601
  additional property: Liveness
    type: PropertyValue
    value: 0.224
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.119
  additional property: Loudness (dB)
    type: PropertyValue
    value: -26.443
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Concerto II in B-Flat Major: IV. Allegro Moderato Staccato
type: MusicRecording
duration: PT2M42S
duration ms: 162573
explicit: false
by artist: Unico Wilhelm van Wassenaer
by artist: Combattimento Consort Amsterdam
by artist: Jan Willem de Vriend
in album: Baroque Concerti from The Netherlands
  type: MusicAlbum
  date published: 2021-03-26
genre: baroque
genre: dutch-baroque
isrc code: NLY332100580
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/957124
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332100580
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:53:27Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4a0807ed8890732afc8544b19a86d19a77f097ca0ba7e9974afaf020f58190. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332100580.
  date published: 2026-07-08T03:53:27Z
audio: Concerto II in B-Flat Major: IV. Allegro Moderato Staccato
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
    type: PropertyValue
    value: 5
  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: 0.472
  additional property: Energy
    type: PropertyValue
    value: 0.264
  additional property: Speechiness
    type: PropertyValue
    value: 0.047
  additional property: Acousticness
    type: PropertyValue
    value: 0.799
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.905
  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
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  additional property: Loudness (dB)
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  additional property: Key Name
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Concerto II in B-Flat Major: II. Largo Andante
type: MusicRecording
duration: PT2M32S
duration ms: 152533
explicit: false
by artist: Unico Wilhelm van Wassenaer
by artist: Combattimento Consort Amsterdam
by artist: Jan Willem de Vriend
in album: Baroque Concerti from The Netherlands
  type: MusicAlbum
  date published: 2021-03-26
genre: baroque
genre: dutch-baroque
isrc code: NLY332100582
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957120
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332100582
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 0x0f8080ffb6ffca460826d2818d0ca542457b3b3b237a9ed1bfbf6cee7ef1ee19. 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/NLY332100582.
  date published: 2026-07-08T03:22:41Z
audio: Concerto II in B-Flat Major: II. Largo Andante
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
    type: PropertyValue
    value: 6
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.287
  additional property: Energy
    type: PropertyValue
    value: 0.067
  additional property: Speechiness
    type: PropertyValue
    value: 0.039
  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
    type: PropertyValue
    value: 0.027
  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
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  additional property: Mode Name
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Concerto IV in G Major: III. Largo Affettuoso
type: MusicRecording
duration: PT3M54S
duration ms: 234866
explicit: false
by artist: Unico Wilhelm van Wassenaer
by artist: Combattimento Consort Amsterdam
by artist: Jan Willem de Vriend
in album: Baroque Concerti from The Netherlands
  type: MusicAlbum
  date published: 2021-03-26
genre: baroque
genre: dutch-baroque
isrc code: NLY332100586
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T14:50:01+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb1104cdeba714fd2ca5c93f9ef69c0c56278ec01f854a04987750ff450ca18c6
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  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/NLY332100586
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 0xb1104cdeba714fd2ca5c93f9ef69c0c56278ec01f854a04987750ff450ca18c6. 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/NLY332100586.
  date published: 2026-07-08T03:22:41Z
audio: Concerto IV in G Major: III. Largo Affettuoso
  type: AudioObject
  additional property: Tempo (BPM)
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    value: 142.185
  additional property: Musical Key
    type: PropertyValue
    value: 11
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.215
  additional property: Energy
    type: PropertyValue
    value: 0.054
  additional property: Speechiness
    type: PropertyValue
    value: 0.039
  additional property: Acousticness
    type: PropertyValue
    value: 0.886
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.009
  additional property: Liveness
    type: PropertyValue
    value: 0.119
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.132
  additional property: Loudness (dB)
    type: PropertyValue
    value: -27.205
  additional property: Key Name
    type: PropertyValue
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  additional property: Mode Name
    type: PropertyValue
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Concerto IV in G Major: IV. Allegro
type: MusicRecording
duration: PT2M4S
duration ms: 124026
explicit: false
by artist: Unico Wilhelm van Wassenaer
by artist: Combattimento Consort Amsterdam
by artist: Jan Willem de Vriend
in album: Baroque Concerti from The Netherlands
  type: MusicAlbum
  date published: 2021-03-26
genre: baroque
genre: dutch-baroque
isrc code: NLY332100587
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T15:02:43+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xead6f9b12b01225ae66e1ee0773af24bc604997754234ba22b0f1044c154ffe8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  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/NLY332100587
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 0xead6f9b12b01225ae66e1ee0773af24bc604997754234ba22b0f1044c154ffe8. 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/NLY332100587.
  date published: 2026-07-08T03:22:41Z
audio: Concerto IV in G Major: IV. Allegro
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
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  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.563
  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
    type: PropertyValue
    value: 0.669
  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)
    type: PropertyValue
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Concerto V in F Minor: IV. A Tempo Giusto
type: MusicRecording
duration: PT1M29S
duration ms: 89173
explicit: false
by artist: Unico Wilhelm van Wassenaer
by artist: Combattimento Consort Amsterdam
by artist: Jan Willem de Vriend
in album: Baroque Concerti from The Netherlands
  type: MusicAlbum
  date published: 2021-03-26
genre: baroque
genre: dutch-baroque
isrc code: NLY332100591
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T06:08:04+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd48b70de1eb12d465a9f72b74ca716ba901eb8034dae429426c75d584e02606f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  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/NLY332100591
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 0xd48b70de1eb12d465a9f72b74ca716ba901eb8034dae429426c75d584e02606f. 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/NLY332100591.
  date published: 2026-07-08T03:22:41Z
audio: Concerto V in F Minor: IV. A Tempo Giusto
  type: AudioObject
  additional property: Tempo (BPM)
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  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: 0.435
  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
    type: PropertyValue
    value: 0.548
  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.174
  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
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  additional property: Mode Name
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Concerto Vi in E-Flat Major: I. Affettuoso
type: MusicRecording
duration: PT2M57S
duration ms: 177226
explicit: false
by artist: Unico Wilhelm van Wassenaer
by artist: Combattimento Consort Amsterdam
by artist: Jan Willem de Vriend
in album: Baroque Concerti from The Netherlands
  type: MusicAlbum
  date published: 2021-03-26
genre: baroque
genre: dutch-baroque
isrc code: NLY332100592
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T16:58:20+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9cdd337ee799de17705b45e17fa844678a2f2d2de948b98163fcbbf139621c8f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957145
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332100592
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdd337ee799de17705b45e17fa844678a2f2d2de948b98163fcbbf139621c8f. 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/NLY332100592.
  date published: 2026-07-08T08:56:20Z
audio: Concerto Vi in E-Flat Major: I. Affettuoso
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
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  additional property: Danceability
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  additional property: Energy
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  additional property: 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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  additional property: Mode Name
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De Fesch: Joseph
type: MusicAlbum
date published: 2021-01-29

Teleman, Loeillet & Others: Recorder Works
type: MusicAlbum
date published: 2020-09-25

Han de Vries: The Almost Last Recordings
type: MusicAlbum
date published: 2024-01-31
track: La Traviata: Parigi, o cara
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  duration: PT4M48S
  duration ms: 288933
  explicit: false
  by artist: Giuseppe Verdi
  by artist: Han De Vries
  by artist: Jacques Zoon
  by artist: London Studio Orchestra
  by artist: Harry Rabinowitz
  in album: Han de Vries: The Almost Last Recordings
    type: MusicAlbum
    date published: 2024-01-31
  genre: classical
  genre: opera
  isrc code: NL3UC2301862
  additional property: CopyrightID
  additional property: CopyrightStatus
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    value: registered
  additional property: CopyrightRegisteredAt
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  additional property: CopyrightChainExplorerURL
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    date published: 2026-07-08T03:22:41Z
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OpenTimestamps Proof of Existence
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date published: 2026-07-02T11:34:59Z

Tristes apprêts pâles flambeaux
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Een Muzikale Anthologie Der Noordelijke Nederlanden
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A Musical Anthology of the Northern Netherlands
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Orpheus with His Lute: Music for Shakespeare from Purcell to Arne (English Orpheus 50)
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Willem De Fesch: VI Concerti Opera Quinta
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Vintage 1996 Music from Holland
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OpenTimestamps Proof of Existence
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date published: 2026-07-02T03:55:08Z

Cello Sonata No. 1 in G Minor: III. Largo
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Cello Sonata in E Minor, RV 40: III. Largo
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:53:27Z
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Cello Sonata in E Minor, RV 40: IV. Allegro
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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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Cello Sonata No. 1 in G Minor: VI. Ricercar II
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subject of: OpenTimestamps Proof of Existence
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Cello Sonata No. 1 in G Minor: VII. Canon à due violoncelli, uno entra una battuta doppo l‘altro
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Cello Sonata No. 1 in G Minor: VII. Canon à due violoncelli, uno entra una battuta doppo l‘altro
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Cello Sonata in C Major, Op. 5 No. 3, H. 105: I. Andante
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: Cello Sonata in C Major, Op. 5 No. 3, H. 105: I. Andante
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Cello Sonata No. 2 in A Major: IV. Presto
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subject of: OpenTimestamps Proof of Existence
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Cello Sonata No. 2 in A Major: VI. Ricercar V
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Cello Sonata in G Minor, Op. 1 No. 4: I. Adagio
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Cello Sonata in D Minor, Op. 5 No. 2, H. 104: I. Andante
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Cello Sonata in G Minor, Op. 1 No. 4: II. Allegro
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Cello Sonata in D Minor, Op. 5 No. 2, H. 104: II. Presto
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Cello Sonata in G Minor, Op. 1 No. 4: III. Largo
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Cello Sonata in A Minor: III. Minuettos I & II
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Cello Sonata No. 1 in D Minor: I. Largo
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Sicilienne for Bassoon or Violoncello
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Détail pour violoncelle baroque et clavecin
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audio: Détail pour violoncelle baroque et clavecin
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Gallardo pour violoncelle et tambourin
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The Cavalry Trot
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Colegium Musicum Iribarren
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Music for the Moment: Classical Relaxation
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プログレッシブ・デュオ
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Trombone & Organ
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Music from the Netherlands
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The Prince of Wales' Concert
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Vignettes for Violin
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Unico
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The Noske Family (Sonata da Camera)
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à Amsterdam
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Willem Noske (Violinist & Collector)
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Amazing Duo II: The Berlin Philharmonic Duo
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A Breath of New Life
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Have Cellos, Will Travel
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Lully, De Fesch, Mozart, Bach, Rameau, Rosenmüller, Viviani, Vitali: Airs de trompette (17th and 18th Century Music for Trumpet, Trombone and Organ)
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Flute Music from the Netherlands
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Barockmusik (Mono Version)
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Flirt im Rokoko
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Express
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Theo, Willem, Herman & Friends
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Perles de cithare
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Barocksonaten Remastered
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Concert pour deux violoncelles (Mono Version)
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Passion & Craftsmanship
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