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genre: classical
description: thumb|Weithaas, Helmchen, Hecker in 2019 Martin Helmchen (born 1982) is a German pianist. He has played with international orchestras and has recorded discs of many classical composers. Life Helmche
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  track: Piano Quintet in A Major, Op. 114, D. 667 "Die Forelle": II. Andante
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  track: Piano Trio No. 2 in E-Flat Major, Op. 100, D. 929: III. Scherzando. Allegro moderato
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Piano Quintet in A Minor, Op. 84: I. Moderato - Allegro
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Piano Concerto No. 4 in G Major, Op. 58: II. Andante con moto
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Piano Concerto No. 27 in B-Flat Major, K. 595: II. Larghetto
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Waldszenen, Op. 82: No. 1, Eintritt
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by artist: Martin Helmchen
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additional property: OTSVerifyInstructions
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Fantasy in C Major, Op. 159, D. 934: III. Andantino
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by artist: Julia Fischer
by artist: Martin Helmchen
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  date published: 2026-07-02T03:55:08Z
audio: Fantasy in C Major, Op. 159, D. 934: III. Andantino
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Fantasia in F Minor for Piano Duet, Op. 103, D. 940: II. Largo
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by artist: Julia Fischer
by artist: Martin Helmchen
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additional property: OTSVerifyInstructions
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  date published: 2026-07-02T03:55:08Z
audio: Fantasia in F Minor for Piano Duet, Op. 103, D. 940: II. Largo
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Piano Sonata No. 20 in A Major, D. 959: III. Scherzo - Allegro Vivace
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duration: PT5M8S
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by artist: Martin Helmchen
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additional property: OTSVerifyInstructions
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  date published: 2026-06-13T17:25:41Z
audio: Piano Sonata No. 20 in A Major, D. 959: III. Scherzo - Allegro Vivace
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6 Moments musicaux, Op. 94, D. 780: III. in F Minor
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by artist: Martin Helmchen
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additional property: OTSVerifyInstructions
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  date published: 2026-06-13T15:41:10Z
audio: 6 Moments musicaux, Op. 94, D. 780: III. in F Minor
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Sonata for Cello and Piano in G Minor, Op. 19: III. Andante
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  date published: 2026-06-13T13:32:09Z
audio: Sonata for Cello and Piano in G Minor, Op. 19: III. Andante
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Sonata for Cello No. 2, Op. 63: I. Moderato
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audio: Sonata for Cello No. 2, Op. 63: I. Moderato
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Piano Trio No. 2 in E-Flat Major, Op. 100, D. 929: III. Scherzando. Allegro moderato
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Du bist die Ruh, Op. 59 No. 3, D. 776 (Arr. X. van Dijk for String Quartet)
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subject of: OpenTimestamps Proof of Existence
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Violin Sonata in D Major, Op. 137 No. 1, D. 384: II. Andante
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: Violin Sonata in D Major, Op. 137 No. 1, D. 384: II. Andante
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Erlkönig, Op. 1, D. 328 (Arr. M. Reger for Voice & Orchestra)
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Dvořák: Piano Concerto and New World Symphony
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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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track: Sospiri, Op. 70
track: Piano Quintet in A Minor, Op. 84: I. Moderato - Allegro

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    date published: 2026-07-08T03:20:19Z
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track: Schwanengesang, D. 957: No. 1, Liebesbotschaft
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OpenTimestamps Proof of Existence
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Schwanengesang, D. 957: No. 3, Frühlingssehnsucht
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String Quintet in C Major, D. 956: IV. Allegretto - Più allegro
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Schwanengesang, D. 957: No. 1, Liebesbotschaft
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OpenTimestamps Proof of Existence
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Violin Concerto No. 3 in G Major, K. 216: II. Adagio
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Piano Sonata No. 25 in G Major, Op. 79: II. Andante
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Piano Concerto No. 1 in G Minor, Op. 25, MWV O 7: II. Andante
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Symphonic Metamorphosis After Themes by Carl Maria von Weber: III. Andantino
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Waldszenen, Op. 82: No. 3, Einsame Blumen
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Violin Sonata in D Major, Op. 137 No. 1, D. 384: II. Andante
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subject of: OpenTimestamps Proof of Existence
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Piano Sonata No. 31 in A-Flat Major, Op. 110: III. Adagio ma non troppo. Arioso dolente
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subject of: OpenTimestamps Proof of Existence
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Thaïs: Méditation
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Wandrers Nachtlied, Op. 96 No. 3, D. 768 (Arr. X. van Dijk for String Quartet)
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  date published: 2026-07-08T03:53:27Z
audio: Wandrers Nachtlied, Op. 96 No. 3, D. 768 (Arr. X. van Dijk for String Quartet)
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O salutaris hostia
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Abendstern, D. 806 (Arr. X. van Dijk for String Quartet)
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String Quartet No. 16 in F Major, Op. 135: III. Lento assai, cantante e tranquillo (Arr. M. Mussorgsky for Piano)
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OTSBitcoinBlockVerifyURL
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OTSVerificationAPI
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value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEB2027110

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 0xbfa236b149e9668adcf473455cbb428749ffaec80bef0078d4e2d32087f9f0b6. 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/SEAEB2027110.
date published: 2026-07-08T03:22:41Z

Violin Sonata No. 7 in C Minor, Op. 30 No. 2 "Eroica": IV. Finale. Allegro - Presto
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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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Beethoven: Violin Sonatas Nos. 1-4
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  genre: classical
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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
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    date published: 2026-07-08T03:20:19Z
  audio: Violin Sonata No. 1 in D Major, Op. 12 No. 1: I. Allegro con brio
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Chilling Cello
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date published: 2019-05-31
track: 3 Old Viennese Dances: II. Liebesleid
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  by artist: Yo-Yo Ma
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  genre: classical
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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: 2026-07-02T11:34:59Z
  audio: 3 Old Viennese Dances: II. Liebesleid
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track: The Carnival of the Animals, R. 125: XIII. Le cygne (Arr. for Cello & 2 Pianos)
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  by artist: Camille Saint-Saëns
  by artist: Steven Isserlis
  by artist: Michael Tilson Thomas
  by artist: Dudley Moore
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    type: MusicAlbum
    date published: 2019-05-31
  popularity: 2
  genre: classical
  genre: late-romantic-era
  genre: french-romanticism
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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
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    date published: 2026-07-08T03:20:19Z
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track: Song Without Words, Op. 109
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  by artist: Felix Mendelssohn
  by artist: Yo-Yo Ma
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  in album: Chilling Cello
    type: MusicAlbum
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  popularity: 2
  genre: classical
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  genre: german-romanticism
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  subject of: OpenTimestamps Proof of Existence
  audio: Song Without Words, Op. 109
track: Salut d'amour, Op. 12
track: Cello Sonata in G Minor, Op 19: III. Andante
track: Violin Sonata in A Major, FWV 8 (Arr. for Cello and Piano): IV. Allegretto poco mosso
track: Porgy and Bess: Summertime (Arr. for Cello and Piano)
track: Seven Years in Tibet
track: Cello Sonata No. 2 in F Major, Op. 99: IV. Allegro molto
track: Fantasiestücke, Op. 73: I. Zart und mit Ausdruck

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OTSHash
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OTSBitcoinBlock
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OTSBitcoinBlockVerifyURL
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OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10606330

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 0xf416d4e439517f25e353b223c2230a5ba83a68884deb0ec4f7aca7f174c30c47. 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/USSM10606330.
date published: 2026-07-08T08:56:20Z

Song Without Words, Op. 109
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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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Salut d'amour, Op. 12
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by artist: Dresdner Kapellsolisten
by artist: Helmut Branny
by artist: Dresden Cathedral Soloists
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genre: classical
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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
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  date published: 2026-07-08T08:56:20Z
audio: Salut d'amour, Op. 12
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  additional property: Danceability
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  additional property: Acousticness
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Cello Sonata in G Minor, Op 19: III. Andante
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by artist: Sonia Wieder-Atherton
by artist: Imogen Cooper
in album: Chilling Cello
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popularity: 3
genre: classical
genre: classical-piano
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additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf55d787481ca77c0f0a31e6afef3714b389717043b0812086112b7003587c2. 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/FRZ050200096.
  date published: 2026-07-08T03:20:19Z
audio: Cello Sonata in G Minor, Op 19: III. Andante
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Violin Sonata in A Major, FWV 8 (Arr. for Cello and Piano): IV. Allegretto poco mosso
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Porgy and Bess: Summertime (Arr. for Cello and Piano)
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Seven Years in Tibet
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Cello Sonata No. 2 in F Major, Op. 99: IV. Allegro molto
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Fantasiestücke, Op. 73: I. Zart und mit Ausdruck
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Schumann & Dvořák: Piano Concertos
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Schubert: Arpeggione Sonata & Trio No. 2
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Brahms: Cello Sonatas
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Schubert: Piano Quintet & Variations on "Trockne Blumen"
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    date published: 2026-07-08T03:53:27Z
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  subject of: OpenTimestamps Proof of Existence
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OpenTimestamps Proof of Existence
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date published: 2026-07-08T03:20:19Z

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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-02T03:30:09Z
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track: Davidsbündlertänze, Op. 6: No. 18, Nicht schnell
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-02T03:30:09Z
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  subject of: OpenTimestamps Proof of Existence
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OpenTimestamps Proof of Existence
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date published: 2026-06-13T17:25:41Z

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    value: https://explorer.copyrightchains.com/tx/0x5eeb7d90d7ef7d32877ffa544e3b749a16f0b3f5c1b4f457f97d06e8cb66a327
  additional property: OTSHash
  additional property: OTSBitcoinBlock
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    value: 957124
  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/FR50X2399402
  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 0x5eeb7d90d7ef7d32877ffa544e3b749a16f0b3f5c1b4f457f97d06e8cb66a327. 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/FR50X2399402.
    date published: 2026-07-08T03:53:27Z
  audio: Partita No. 1 in B-Flat Major, BWV 825: II. Allemande
    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: 0.249
    additional property: Energy
      type: PropertyValue
      value: 0.353
    additional property: Speechiness
      type: PropertyValue
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    additional property: Acousticness
      type: PropertyValue
      value: 0.82
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.897
    additional property: Liveness
      type: PropertyValue
      value: 0.061
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.916
    additional property: Loudness (dB)
      type: PropertyValue
      value: -23.715
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Partita No. 3 in A Minor, BWV 827: I. Fantasia
  type: MusicRecording
  duration: PT2M54S
  duration ms: 174527
  explicit: false
  by artist: Johann Sebastian Bach
  by artist: Martin Helmchen
  in album: Bach: Six Partitas
    type: MusicAlbum
    date published: 2024-05-03
  genre: classical
  genre: classical-piano
  isrc code: FR50X2399407
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-07T15:13:35+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x4572b4a823194971409842b34bc9a2ac26dd4b6c9e4c6239f8f09e87c96902e1
  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: Partita No. 3 in A Minor, BWV 827: I. Fantasia
track: Partita No. 3 in A Minor, BWV 827: III. Courante
track: Partita No. 3 in A Minor, BWV 827: VI. Scherzo
track: Partita No. 3 in A Minor, BWV 827: VII. Gigue
track: Partita No. 4 in D Major, BWV 828: I. Ouverture

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 957145

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/957145

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X2399407

OTSTimestamp
type: PropertyValue
value: 2026-07-08T08:56:20Z

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 0x4572b4a823194971409842b34bc9a2ac26dd4b6c9e4c6239f8f09e87c96902e1. 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/FR50X2399407.
date published: 2026-07-08T08:56:20Z

Partita No. 3 in A Minor, BWV 827: I. Fantasia
type: AudioObject
additional property: Tempo (BPM)
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  value: 145.407
additional property: Musical Key
  type: PropertyValue
  value: 8
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 0
additional property: Time Signature
  type: PropertyValue
  value: 5
additional property: Danceability
  type: PropertyValue
  value: 0.36
additional property: Energy
  type: PropertyValue
  value: 0.281
additional property: Speechiness
  type: PropertyValue
  value: 0.056
additional property: Acousticness
  type: PropertyValue
  value: 0.836
additional property: Instrumentalness
  type: PropertyValue
  value: 0.966
additional property: Liveness
  type: PropertyValue
  value: 0.26
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.925
additional property: Loudness (dB)
  type: PropertyValue
  value: -24.68
additional property: Key Name
  type: PropertyValue
  value: Ab
additional property: Mode Name
  type: PropertyValue
  value: Minor

Partita No. 3 in A Minor, BWV 827: III. Courante
type: MusicRecording
duration: PT3M2S
duration ms: 182233
explicit: false
by artist: Johann Sebastian Bach
by artist: Martin Helmchen
in album: Bach: Six Partitas
  type: MusicAlbum
  date published: 2024-05-03
genre: classical
genre: classical-piano
isrc code: FR50X2399409
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
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  value: 2026-07-07T19:35:13+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf1b91e963a3e19a17b9df598f82c73f689eca9ebccc881424ff301204e021011
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957124
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/FR50X2399409
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 0xf1b91e963a3e19a17b9df598f82c73f689eca9ebccc881424ff301204e021011. 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/FR50X2399409.
  date published: 2026-07-08T03:53:27Z
audio: Partita No. 3 in A Minor, BWV 827: III. Courante
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 130.836
  additional property: Musical Key
    type: PropertyValue
    value: 8
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.333
  additional property: Energy
    type: PropertyValue
    value: 0.408
  additional property: Speechiness
    type: PropertyValue
    value: 0.047
  additional property: Acousticness
    type: PropertyValue
    value: 0.843
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.965
  additional property: Liveness
    type: PropertyValue
    value: 0.1
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.953
  additional property: Loudness (dB)
    type: PropertyValue
    value: -20.41
  additional property: Key Name
    type: PropertyValue
    value: Ab
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Partita No. 3 in A Minor, BWV 827: VI. Scherzo
type: MusicRecording
duration: PT1M1S
duration ms: 61939
explicit: false
by artist: Johann Sebastian Bach
by artist: Martin Helmchen
in album: Bach: Six Partitas
  type: MusicAlbum
  date published: 2024-05-03
genre: classical
genre: classical-piano
isrc code: FR50X2399412
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T16:52:01+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa073cc9fb178e310b73d538989251f303353182456e5f1d0d38acb6c7dac428d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957124
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/FR50X2399412
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 0xa073cc9fb178e310b73d538989251f303353182456e5f1d0d38acb6c7dac428d. 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/FR50X2399412.
  date published: 2026-07-08T03:53:27Z
audio: Partita No. 3 in A Minor, BWV 827: VI. Scherzo
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 140.579
  additional property: Musical Key
    type: PropertyValue
    value: 8
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.321
  additional property: Energy
    type: PropertyValue
    value: 0.387
  additional property: Speechiness
    type: PropertyValue
    value: 0.034
  additional property: Acousticness
    type: PropertyValue
    value: 0.805
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.843
  additional property: Liveness
    type: PropertyValue
    value: 0.229
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.976
  additional property: Loudness (dB)
    type: PropertyValue
    value: -19.872
  additional property: Key Name
    type: PropertyValue
    value: Ab
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Partita No. 3 in A Minor, BWV 827: VII. Gigue
type: MusicRecording
duration: PT3M22S
duration ms: 202216
explicit: false
by artist: Johann Sebastian Bach
by artist: Martin Helmchen
in album: Bach: Six Partitas
  type: MusicAlbum
  date published: 2024-05-03
genre: classical
genre: classical-piano
isrc code: FR50X2399413
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T15:01:03+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4c97bae154730646a35a80da000b71b6f03cb6867bd3a5357466365dcf7e40b2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957145
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/FR50X2399413
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 0x4c97bae154730646a35a80da000b71b6f03cb6867bd3a5357466365dcf7e40b2. 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/FR50X2399413.
  date published: 2026-07-08T08:56:20Z
audio: Partita No. 3 in A Minor, BWV 827: VII. Gigue
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 118.17
  additional property: Musical Key
    type: PropertyValue
    value: 8
  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.367
  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
    value: 0.042
  additional property: Acousticness
    type: PropertyValue
    value: 0.799
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.964
  additional property: Liveness
    type: PropertyValue
    value: 0.141
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.962
  additional property: Loudness (dB)
    type: PropertyValue
    value: -20.741
  additional property: Key Name
    type: PropertyValue
    value: Ab
  additional property: Mode Name
    type: PropertyValue
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Partita No. 4 in D Major, BWV 828: I. Ouverture
type: MusicRecording
duration: PT5M46S
duration ms: 346706
explicit: false
by artist: Johann Sebastian Bach
by artist: Martin Helmchen
in album: Bach: Six Partitas
  type: MusicAlbum
  date published: 2024-05-03
genre: classical
genre: classical-piano
isrc code: FR50X2399414
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T15:26:46+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x34096cf309f27f1051519f91d7ace8d7bd94192cc3a04926b927a09b8b146419
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/FR50X2399414
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 0x34096cf309f27f1051519f91d7ace8d7bd94192cc3a04926b927a09b8b146419. 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/FR50X2399414.
  date published: 2026-07-08T03:22:41Z
audio: Partita No. 4 in D Major, BWV 828: I. Ouverture
  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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  additional property: Time Signature
    type: PropertyValue
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  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
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  additional property: Liveness
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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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Schumann: Novelleten & Gesänge der Frühe
type: MusicAlbum
date published: 2022-04-08
track: Novelletten, Op. 21: I. Markiert und kräftig
  type: MusicRecording
  duration: PT4M52S
  duration ms: 292180
  explicit: false
  by artist: Robert Schumann
  by artist: Martin Helmchen
  in album: Schumann: Novelleten & Gesänge der Frühe
    type: MusicAlbum
    date published: 2022-04-08
  genre: classical
  genre: classical-piano
  genre: chamber-music
  isrc code: FR50X2185701
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-07T19:01:40+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x8682d9e3bbfa00caf1f30b54c94db8b6e6146ec0380c7cec7ed101e88d3c21a5
  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/FR50X2185701
  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 0x8682d9e3bbfa00caf1f30b54c94db8b6e6146ec0380c7cec7ed101e88d3c21a5. 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/FR50X2185701.
    date published: 2026-07-08T03:53:27Z
  audio: Novelletten, Op. 21: I. Markiert und kräftig
    type: AudioObject
    additional property: Tempo (BPM)
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      value: 95.445
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.426
    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: 0.855
    additional property: Liveness
      type: PropertyValue
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    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.178
    additional property: Loudness (dB)
      type: PropertyValue
      value: -24.682
    additional property: Key Name
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    additional property: Mode Name
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Messiaen: Vingt Regards sur l'Enfant-Jésus
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date published: 2019-02-15
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    date published: 2026-07-08T08:56:20Z
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Beethoven: Diabelli Variations
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Mozart: Piano Concertos Nos. 15 & 27
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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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  audio: Etudes symphoniques, Op. 13: Variation 2
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track: Etudes symphoniques, Op. 13: Anhang Variation 1
track: Etudes symphoniques, Op. 13: Variation 4
track: Etudes symphoniques, Op. 13: Variation 5
track: Etudes symphoniques, Op. 13: Anhang Variation 4
track: Etudes symphoniques, Op. 13: Variation 7
track: Etudes symphoniques, Op. 13: Variation 9
track: Arabeske in C Major, Op. 18

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date published: 2026-07-08T03:22:41Z

Etudes symphoniques, Op. 13: Variation 2
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Etudes symphoniques, Op. 13: Etude 3
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Etudes symphoniques, Op. 13: Anhang Variation 1
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Etudes symphoniques, Op. 13: Variation 4
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Etudes symphoniques, Op. 13: Variation 5
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subject of: OpenTimestamps Proof of Existence
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Etudes symphoniques, Op. 13: Anhang Variation 4
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subject of: OpenTimestamps Proof of Existence
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Etudes symphoniques, Op. 13: Variation 7
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Etudes symphoniques, Op. 13: Variation 9
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Arabeske in C Major, Op. 18
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d'Indy, Saint-Saëns & Chausson
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Shostakovich: Piano Concerti & Piano Quintet
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Schubert Complete Works for Violin and Piano, Vol. 2
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date published: 2010-04-01

Schubert Complete Works for Violin and Piano, Vol. 1
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OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:53:27Z
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track: Fantasy in C Major, Op. 159, D. 934: I. Andante molto
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track: Rondo in B Minor, Op. 70, D. 895 "Rondeau Brilliant": Andante - Allegro
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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: 2026-07-08T03:53:27Z
audio: Violin Sonata (Sonatina) in G Minor, Op. 137 No. 3, D. 408: III. Menuetto and Trio
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Fantasia in F Minor for Piano Duet, Op. 103, D. 940: I.II. Allegro vivace
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duration: PT5M41S
duration ms: 341200
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by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert Complete Works for Violin and Piano
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  date published: 2009-08-01
genre: classical
genre: classical-piano
genre: chamber-music
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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
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  date published: 2026-07-08T03:22:41Z
audio: Fantasia in F Minor for Piano Duet, Op. 103, D. 940: I.II. Allegro vivace
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Rondo in B Minor, Op. 70, D. 895 "Rondeau Brilliant": Andante - Allegro
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by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert Complete Works for Violin and Piano
  type: MusicAlbum
  date published: 2009-08-01
genre: classical
genre: classical-piano
genre: chamber-music
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additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127d3f838a386b48e6392e983d3a4d166251f04f97fba25cf3a7113d26e04e2b. 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/NLE420900112.
  date published: 2026-07-08T03:22:41Z
audio: Rondo in B Minor, Op. 70, D. 895 "Rondeau Brilliant": Andante - Allegro
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Fantasia in F Minor for Piano Duet, Op. 103, D. 940: IV. Tempo I
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by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert Complete Works for Violin and Piano
  type: MusicAlbum
  date published: 2009-08-01
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE420900212
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9deca100b1b8ec22efdf51d9701a706fe898606768d59c83d4941c2ecc5ba57c. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900212.
  date published: 2026-07-07T20:41:57Z
audio: Fantasia in F Minor for Piano Duet, Op. 103, D. 940: IV. Tempo I
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Schubert: 6 Moments musicaux & Piano Sonata
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track: Piano Sonata No. 20 in A Major, D. 959: II. Andantino
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  genre: classical
  genre: classical-piano
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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 0xb6bca988a7c391d07286cfa4747855fa98706d35f3813314f9571dd6d0ddefd7. 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/NLE420702902.
    date published: 2026-07-08T03:53:27Z
  audio: Piano Sonata No. 20 in A Major, D. 959: II. Andantino
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    additional property: Tempo (BPM)
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track: Piano Sonata No. 20 in A Major, D. 959: III. Scherzo - Allegro Vivace
track: 6 Moments musicaux, Op. 94, D. 780: I. in C Major
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  genre: classical
  genre: classical-piano
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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
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    date published: 2026-07-08T03:53:27Z
  audio: 6 Moments musicaux, Op. 94, D. 780: I. in C Major
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  subject of: OpenTimestamps Proof of Existence
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track: 6 Moments musicaux, Op. 94, D. 780: III. in F Minor
track: 6 Moments musicaux, Op. 94, D. 780: VI. in A-Flat Major

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OTSBitcoinBlockVerifyURL
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OTSVerificationAPI
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OTSTimestamp
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OTSVerifyInstructions
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OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939863e320dc943e61e23edb00217c3c04e3c9569124903c0ee37a974da4c1de. 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/NLE420702906.
date published: 2026-07-08T03:20:19Z

6 Moments musicaux, Op. 94, D. 780: II. in A-Flat Major
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6 Moments musicaux, Op. 94, D. 780: VI. in A-Flat Major
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XIXth Clara Haskil Competition 2001 (Live Recording)
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