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genre: classical
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followers: 69
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subject of: OpenTimestamps Proof of Existence
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album: Mozart For Relaxation
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  date published: 1998-09-30
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    by artist: James Galway
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    by artist: Eduardo Mata
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      date published: 1998-09-30
    popularity: 17
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    additional property: OTSVerifyInstructions
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-02T03:55:08Z
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-02T03:55:08Z
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  track: Andante in C for Flute and Orchestra, K. 315
  track: Clarinet Concerto in A Major, KV 622: Adagio
  track: Piano Concerto No. 21 in C Major, K. 467: II. Andante
album: Mozart-Concertos Pour Flute-Concerto Pour Flûte Et Harpe
album: Voříšek & Rejcha: Symphonies
album: Stamic, Voříšek: Symphonies by Old Czech Masters
album: Dream with Mozart
album: Mozart pro lepší učení, koncentraci a paměť
album: Chefs-d'oeuvre immortels
album: Vivaldi: Le quattro stagioni
album: Vivaldi: The Four Seasons - Bach: 2 Violins Concerto
album: Best of Mozart
album: Linek: Musica pastoralis
album: Composition on Jiří Wolker Poets
album: Koželuh: Symphonies
album: Haydn: Violin Concertos
album: Ernst, Wieniawski: Romantic Violin Concertos
album: 'Sonata facile' and other works - Mozart
album: Dřízga, Košťál, Kovaříček: The Creation of A New Week, 1974
album: Mozart: Horn Concertos K. 412, K. 495, K. 417 & K. 447
album: Fiala, Rössler-Rosetti, Rejcha: Concertos for French Horns and Orchestra
album: Mozart: Violin Concertos Vol. 1 - Classical Navigator
album: Mozart: Violin Concertos Vol. 2 - Classical Navigator
album: Mozart: Violin Concertos Nos 1-5
album: Telemann, Händel, Bach: Viola Concertos
album: Rubinstein: Melody No. 1 in F Major, Op. 3 (Digitally Remastered)
album: Toselli, Drdla: Sérénades - Scott: Au pays du lotus (Mono Version)
album: Grandes Compositores - Haydn
album: Mozart Sleep
album: "A Bright Sunday" with Mozart
album: Dvořák: Mazurek, Romance - Schubert: Polonaise - Schumann: Fantasy
album: Paganini, Martinů, Tausinger, Ulrich, Nejedlý: Works for Violin
album: Ostrčil: String Quartet in B Major, Op. 4, Sonatina, Op. 22
album: Chamber Music of the Baroque Period
album: Křivinka, Stanislav, Flosman: Violin Sonatas

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Violin Concerto No. 3 in G Major, K. 216: II. Adagio
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:55:08Z
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Andante in C for Flute and Orchestra, K. 315
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:55:08Z
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Clarinet Concerto in A Major, KV 622: Adagio
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:55:08Z
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Piano Concerto No. 21 in C Major, K. 467: II. Andante
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Mozart-Concertos Pour Flute-Concerto Pour Flûte Et Harpe
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Voříšek & Rejcha: Symphonies
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Stamic, Voříšek: Symphonies by Old Czech Masters
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Dream with Mozart
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Mozart pro lepší učení, koncentraci a paměť
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Chefs-d'oeuvre immortels
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track: La Lettre A Elise
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  audio: La Lettre A Elise
track: Marche Turque
track: Orchestral Suite No. 3 in D Major, BWV 1068: 2. Air
track: Romeo and Juliet, Op.64 / Act 1: 13. Dance of the Knights

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OpenTimestamps Proof of Existence
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date published: 2026-07-02T03:55:08Z

La Lettre A Elise
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Marche Turque
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:55:08Z
audio: Marche Turque
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Orchestral Suite No. 3 in D Major, BWV 1068: 2. Air
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duration: PT5M17S
duration ms: 317480
explicit: false
by artist: Johann Sebastian Bach
by artist: Orchestre De Chambre De Toulouse
by artist: Louis Auriacombe
in album: Chefs-d'oeuvre immortels
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genre: classical
genre: classical-piano
genre: early-music
genre: baroque
genre: chamber-music
genre: concerto
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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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  date published: 2026-07-31T08:26:41Z
audio: Orchestral Suite No. 3 in D Major, BWV 1068: 2. Air
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Romeo and Juliet, Op.64 / Act 1: 13. Dance of the Knights
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duration ms: 232626
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by artist: Sergei Prokofiev
by artist: Roland Douatte
by artist: Orchestre Symphonique Radio Luxembourg
in album: Chefs-d'oeuvre immortels
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genre: classical
genre: orchestra
genre: neoclassical
isrc code: FRZ397300540
additional property: CopyrightID
additional property: CopyrightStatus
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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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0677bb3e90a59c3466625bec32703138fd59bcf6bfdf101fbbbef1774bc4bc5f. 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/FRZ397300540.
  date published: 2026-07-08T03:20:19Z
audio: Romeo and Juliet, Op.64 / Act 1: 13. Dance of the Knights
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  additional property: Tempo (BPM)
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Vivaldi: Le quattro stagioni
type: MusicAlbum
date published: 1992-01-01

Vivaldi: The Four Seasons - Bach: 2 Violins Concerto
type: MusicAlbum
date published: 1989-01-01
track: The Four Seasons, Op. 8, Violin Concerto No. 1 in E Major, RV 269 "Spring": I. Allegro
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  duration: PT3M32S
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  by artist: Antonio Vivaldi
  by artist: Prague Chamber Orchestra
  by artist: Libor Hlaváček
  by artist: Josef Suk
  by artist: František Xaver Thuri
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    type: MusicAlbum
    date published: 1989-01-01
  genre: classical
  genre: early-music
  genre: baroque
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  additional property: OTSVerificationAPI
    type: PropertyValue
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  additional property: OTSTimestamp
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  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
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    date published: 2026-07-02T03:30:09Z
  audio: The Four Seasons, Op. 8, Violin Concerto No. 1 in E Major, RV 269 "Spring": I. Allegro
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track: The Four Seasons, Op. 8, Violin Concerto No. 1 in E Major, RV 269 "Spring": II. Largo e pianissimo sempre
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  genre: classical
  genre: early-music
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  additional property: OTSVerificationAPI
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  additional property: OTSTimestamp
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  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
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    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223c185a11ea981319cf5e792a40be8d41bb956e0464d54cbb9782726c0a2ee5. 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/CZA167602335.
    date published: 2026-07-08T03:22:41Z
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track: The Four Seasons, Op. 8, Violin Concerto No. 1 in E Major, RV 269 "Spring": III. Danza pastorale. Allegro
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  by artist: Josef Suk
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    type: MusicAlbum
    date published: 1989-01-01
  genre: classical
  genre: early-music
  genre: baroque
  genre: concerto
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  additional property: CopyrightID
  additional property: CopyrightStatus
  additional property: CopyrightRegisteredAt
  additional property: CopyrightChainExplorerURL
  additional property: OTSHash
  additional property: OTSBitcoinBlock
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: The Four Seasons, Op. 8, Violin Concerto No. 1 in E Major, RV 269 "Spring": III. Danza pastorale. Allegro
track: The Four Seasons, Op. 8, Violin Concerto No. 2 in G Minor, RV 315 "Summer": III. Presto
track: The Four Seasons, Op. 8, Violin Concerto No. 3 in F Major, RV 293 "Autumn": I. Allegro
track: The Four Seasons, Op. 8, Violin Concerto No. 3 in F Major, RV 293 "Autumn": III. Allegro
track: The Four Seasons, Op. 8, Violin Concerto No. 4 in F Minor, RV 297 "Winter": I. Allegro non molto
track: The Four Seasons, Op. 8, Violin Concerto No. 4 in F Minor, RV 297 "Winter": II. Largo
track: Concerto for 2 Violins in D Minor, BWV 1043: I. Vivace

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OTSHash
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OTSBitcoinBlock
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value: 957120

OTSBitcoinBlockVerifyURL
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value: https://blockstream.info/api/block-height/957120

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA167603335

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 0x455bf1a0611606f077147431549a1a304b63045351b54ecda5bc1e6d32e1d8b5. 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/CZA167603335.
date published: 2026-07-08T03:22:41Z

The Four Seasons, Op. 8, Violin Concerto No. 1 in E Major, RV 269 "Spring": III. Danza pastorale. Allegro
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The Four Seasons, Op. 8, Violin Concerto No. 2 in G Minor, RV 315 "Summer": III. Presto
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by artist: František Xaver Thuri
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genre: classical
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additional property: CopyrightRegisteredAt
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additional property: OTSVerificationAPI
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-13T12:53:06Z
audio: The Four Seasons, Op. 8, Violin Concerto No. 2 in G Minor, RV 315 "Summer": III. Presto
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The Four Seasons, Op. 8, Violin Concerto No. 3 in F Major, RV 293 "Autumn": I. Allegro
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by artist: Prague Chamber Orchestra
by artist: Libor Hlaváček
by artist: Josef Suk
by artist: František Xaver Thuri
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genre: classical
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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The Four Seasons, Op. 8, Violin Concerto No. 3 in F Major, RV 293 "Autumn": III. Allegro
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by artist: František Xaver Thuri
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T20:22:46Z
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The Four Seasons, Op. 8, Violin Concerto No. 4 in F Minor, RV 297 "Winter": I. Allegro non molto
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by artist: Prague Chamber Orchestra
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by artist: František Xaver Thuri
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:55:08Z
audio: The Four Seasons, Op. 8, Violin Concerto No. 4 in F Minor, RV 297 "Winter": I. Allegro non molto
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The Four Seasons, Op. 8, Violin Concerto No. 4 in F Minor, RV 297 "Winter": II. Largo
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: The Four Seasons, Op. 8, Violin Concerto No. 4 in F Minor, RV 297 "Winter": II. Largo
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Concerto for 2 Violins in D Minor, BWV 1043: I. Vivace
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by artist: Josef Suk
by artist: Miroslav Kosina
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additional property: OTSVerificationAPI
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Concerto for 2 Violins in D Minor, BWV 1043: I. Vivace
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Best of Mozart
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date published: 2020-06-15

Linek: Musica pastoralis
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Composition on Jiří Wolker Poets
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Koželuh: Symphonies
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Haydn: Violin Concertos
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Ernst, Wieniawski: Romantic Violin Concertos
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'Sonata facile' and other works - Mozart
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track: The London Sketchbook, K. 15a-ss (Orch. Smith): [Contredanse] in G Major, K. 15e
track: Concerto for Flute, Harp, and Orchestra in C Major, K. 299: 2b. Andantino - Pt. 2
track: 6 Minuets K.61h: No. 2 in A
track: Minuet in C Major, K.15f
track: Violin Sonata in E-Flat Major, K. 481: III. Allegretto con variazioni: Var. 2
track: Piano Concerto No. 21 in C Major, K. 467: 2b. Andante - Pt. 2
track: 12 Contredanses for Count Czernin, K.269b - orch. Erik Smith: No. 3 in C
track: Divertimento No. 15 in B Flat Major, K.287: Variation V
track: Symphony No. 31 in D Major, K. 297 "Paris": 2a. Andante - Pt. 1
track: Piano Sonata No. 11 in A Major, K. 331: 3. Alla Turca (Allegretto)
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track: Allegro in F, K.1c
track: Violin Concerto No. 3 in G Major, K. 216: 2a. Adagio - Pt. 1
track: Symphony No. 33 in B-Flat Major, K. 319: 2c. Andante moderato - Pt. 3
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track: The London Sketchbook, K. 15a-ss (Orch. Smith): [Contredanse] in F Major, K. 15h
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OpenTimestamps Proof of Existence
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Piano Sonata No. 16 in C Major, K. 545 "Sonata facile": III. Rondo. Allegretto
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The London Sketchbook, K. 15a-ss (Orch. Smith): [Contredanse] in G Major, K. 15e
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Concerto for Flute, Harp, and Orchestra in C Major, K. 299: 2b. Andantino - Pt. 2
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6 Minuets K.61h: No. 2 in A
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Minuet in C Major, K.15f
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Violin Sonata in E-Flat Major, K. 481: III. Allegretto con variazioni: Var. 2
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Piano Concerto No. 21 in C Major, K. 467: 2b. Andante - Pt. 2
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12 Contredanses for Count Czernin, K.269b - orch. Erik Smith: No. 3 in C
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Divertimento No. 15 in B Flat Major, K.287: Variation V
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subject of: OpenTimestamps Proof of Existence
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Symphony No. 31 in D Major, K. 297 "Paris": 2a. Andante - Pt. 1
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subject of: OpenTimestamps Proof of Existence
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Piano Sonata No. 11 in A Major, K. 331: 3. Alla Turca (Allegretto)
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subject of: OpenTimestamps Proof of Existence
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Minuet in F Major from K.6 (Nannerl Notebook No. 48)
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T12:24:41Z
audio: Minuet in F Major from K.6 (Nannerl Notebook No. 48)
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Violin Sonata in E-Flat Major, K. 481: III. Allegretto con variazioni: Var. 1
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by artist: Arthur Grumiaux
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Violin Sonata in E-Flat Major, K. 481: III. Allegretto con variazioni: Var. 1
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Overture and Three Contredanses, K.106: Contredanse No. 1 in D Major
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by artist: Wiener Mozart Ensemble
by artist: Willi Boskovsky
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T23:30:38Z
audio: Overture and Three Contredanses, K.106: Contredanse No. 1 in D Major
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Allegro in F, K.1c
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T15:20:15Z
audio: Allegro in F, K.1c
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Violin Concerto No. 3 in G Major, K. 216: 2a. Adagio - Pt. 1
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T19:53:13Z
audio: Violin Concerto No. 3 in G Major, K. 216: 2a. Adagio - Pt. 1
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Symphony No. 33 in B-Flat Major, K. 319: 2c. Andante moderato - Pt. 3
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T12:24:41Z
audio: Symphony No. 33 in B-Flat Major, K. 319: 2c. Andante moderato - Pt. 3
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Idomeneo, re di Creta, K.366 / Act 1: Allegro - Live
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T19:53:13Z
audio: Idomeneo, re di Creta, K.366 / Act 1: Allegro - Live
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Minuet in F Major, K.32, (Nannerl Notebook No. 19)
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Instrumental Canon, K.228
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subject of: OpenTimestamps Proof of Existence
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The London Sketchbook, K. 15a-ss (Orch. Smith): [Contredanse] in F Major, K. 15h
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Piano Sonata No.14 in C Minor, K. 457: 2g. Adagio - Pt. 7
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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German Dance in F Major, K.15oo
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Dřízga, Košťál, Kovaříček: The Creation of A New Week, 1974
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Mozart: Horn Concertos K. 412, K. 495, K. 417 & K. 447
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Fiala, Rössler-Rosetti, Rejcha: Concertos for French Horns and Orchestra
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Mozart: Violin Concertos Vol. 1 - Classical Navigator
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Mozart: Violin Concertos Nos 1-5
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date published: 2026-07-02T03:30:09Z

Mozart Lullaby Variation (From Wiegenlied, K. 350, Arr. for Piano by Jan-Peter Klöpfel)
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Mozart Variation III (After 12 Variationen über Ah, vous dirai-je Maman/Morgen kommt der Weihnachtsmann, K.265, Arr. for Piano by Martin Stadtfeld)
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Mozart Variation III (After 12 Variationen über Ah, vous dirai-je Maman/Morgen kommt der Weihnachtsmann, K.265, Arr. for Piano by Martin Stadtfeld)
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Ave verum corpus, K.618 (Arr. for Piano by Franz Liszt)
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-13T12:47:07Z
audio: Ave verum corpus, K.618 (Arr. for Piano by Franz Liszt)
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Andante in F Major, K. 15a
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:53:27Z
audio: Andante in F Major, K. 15a
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Fantasia in G Major, K. 15g
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Fantasia in G Major, K. 15g
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Allegretto in E-Flat Major, K. 15mm
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-07T14:04:01Z
audio: Allegretto in E-Flat Major, K. 15mm
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Piano Sonata No. 16 in C Major, K. 545 "Sonata facile" (Transcribed for Harp by Xavier de Maistre): I. Allegro
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Mozart Symphony 40 Variation (From Symphony No. 40, K. 550, Arr. for Piano by Svetoslav Karparov)
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additional property: CopyrightChainExplorerURL
  type: PropertyValue
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additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957118
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862300332
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c95458d16e905bae4d2120814c96b85657993043c77f78a57b0be0c29eec880. 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/DEE862300332.
  date published: 2026-07-08T03:20:19Z
audio: Mozart Symphony 40 Variation (From Symphony No. 40, K. 550, Arr. for Piano by Svetoslav Karparov)
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
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  additional property: Speechiness
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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: Key Name
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  additional property: Mode Name
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Andante in C Major, K. 15s
type: MusicRecording
duration: PT0M54S
duration ms: 54946
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Martin Stadtfeld
in album: Mozart Sleep
  type: MusicAlbum
  date published: 2025-03-14
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: DEE861500261
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-27T06:55:07+00:00
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0x513cf40f989302e593b88020172142f1d6f769e3a7a53baedf89815a969b5966
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861500261
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513cf40f989302e593b88020172142f1d6f769e3a7a53baedf89815a969b5966. 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/DEE861500261.
  date published: 2026-07-08T03:20:19Z
audio: Andante in C Major, K. 15s
  type: AudioObject
  additional property: Tempo (BPM)
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    value: 97.901
  additional property: Musical Key
    type: PropertyValue
    value: 0
  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: 0.41
  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
    type: PropertyValue
    value: 0.992
  additional property: Instrumentalness
    type: PropertyValue
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  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
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    value: 0.487
  additional property: Loudness (dB)
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  additional property: Key Name
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  additional property: Mode Name
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Mozart Zauberflöte Lullaby (From Die Zauberflöte, K. 620: Der Vogelfänger bin ich ja, Arr. for Piano by Jan-Peter Klöpfel)
type: MusicRecording
duration: PT2M6S
duration ms: 126250
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Gabriele Bagnati
in album: Mozart Sleep
  type: MusicAlbum
  date published: 2025-03-14
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: DEE862401105
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-18T14:13:54+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0eaca1d7372f2e604986aeaecf42cdc3e5a652e799817d76e48131e8fa6e153a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956302
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862401105
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:30:09Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eaca1d7372f2e604986aeaecf42cdc3e5a652e799817d76e48131e8fa6e153a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEE862401105.
  date published: 2026-07-02T03:30:09Z
audio: Mozart Zauberflöte Lullaby (From Die Zauberflöte, K. 620: Der Vogelfänger bin ich ja, Arr. for Piano by Jan-Peter Klöpfel)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 94.592
  additional property: Musical Key
    type: PropertyValue
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  additional property: Mode (Major/Minor)
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    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.574
  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
    type: PropertyValue
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  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.411
  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
    type: PropertyValue
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  additional property: Mode Name
    type: PropertyValue
    value: Major

Flute Quartet No. 1 in D Major, K. 285: II. Adagio
type: MusicRecording
duration: PT2M43S
duration ms: 163253
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Magali Mosnier
by artist: Munich Chamber Orchestra
in album: Mozart Sleep
  type: MusicAlbum
  date published: 2025-03-14
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: DEE861400801
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-04T11:02:33+00:00
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0x5b8de547a5d116de1d4ed0eb5666e164b961602a48c233b4fea11fd42ff7a93a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861400801
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8de547a5d116de1d4ed0eb5666e164b961602a48c233b4fea11fd42ff7a93a. 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/DEE861400801.
  date published: 2026-07-08T03:20:19Z
audio: Flute Quartet No. 1 in D Major, K. 285: II. Adagio
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 104.372
  additional property: Musical Key
    type: PropertyValue
    value: 11
  additional property: Mode (Major/Minor)
    type: PropertyValue
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  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.338
  additional property: Energy
    type: PropertyValue
    value: 0.03
  additional property: Speechiness
    type: PropertyValue
    value: 0.039
  additional property: Acousticness
    type: PropertyValue
    value: 0.927
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.504
  additional property: Liveness
    type: PropertyValue
    value: 0.115
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.309
  additional property: Loudness (dB)
    type: PropertyValue
    value: -26.416
  additional property: Key Name
    type: PropertyValue
    value: B
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Die Zauberflöte, K. 620: Der Vogelfänger bin ich ja (Arr. for Oboe and Orchestra by François Leleux)
type: MusicRecording
duration: PT2M16S
duration ms: 136813
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: François Leleux
by artist: Camerata Salzburg
in album: Mozart Sleep
  type: MusicAlbum
  date published: 2025-03-14
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: DEE860800577
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-23T08:01:43+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2d0ceb2153d3abfc357e619e1473f844e952991eb27949b542cc54a62b41d3af
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957118
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE860800577
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0ceb2153d3abfc357e619e1473f844e952991eb27949b542cc54a62b41d3af. 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/DEE860800577.
  date published: 2026-07-08T03:20:19Z
audio: Die Zauberflöte, K. 620: Der Vogelfänger bin ich ja (Arr. for Oboe and Orchestra by François Leleux)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 98.152
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.384
  additional property: Energy
    type: PropertyValue
    value: 0.063
  additional property: Speechiness
    type: PropertyValue
    value: 0.053
  additional property: Acousticness
    type: PropertyValue
    value: 0.981
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.879
  additional property: Liveness
    type: PropertyValue
    value: 0.324
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.601
  additional property: Loudness (dB)
    type: PropertyValue
    value: -24.102
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Major

Serenade No. 13 in G Major, K. 525 "Eine kleine Nachtmusik": III. Menuetto. Allegretto
type: MusicRecording
duration: PT2M12S
duration ms: 132626
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Collegium Aureum
by artist: Franzjosef Maier
in album: Mozart Sleep
  type: MusicAlbum
  date published: 2025-03-14
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: DEE470400274
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-25T15:27:58+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb7f702337999fec573f5b0f99903ba2a81d8a54eeab9e42ca86e8122668871b9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957118
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE470400274
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f702337999fec573f5b0f99903ba2a81d8a54eeab9e42ca86e8122668871b9. 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/DEE470400274.
  date published: 2026-07-08T03:20:19Z
audio: Serenade No. 13 in G Major, K. 525 "Eine kleine Nachtmusik": III. Menuetto. Allegretto
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 137.337
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.326
  additional property: Energy
    type: PropertyValue
    value: 0.13
  additional property: Speechiness
    type: PropertyValue
    value: 0.038
  additional property: Acousticness
    type: PropertyValue
    value: 0.501
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.838
  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.473
  additional property: Loudness (dB)
    type: PropertyValue
    value: -15.752
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Allegretto in D Major, K. 15o
type: MusicRecording
duration: PT1M20S
duration ms: 80826
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Martin Stadtfeld
in album: Mozart Sleep
  type: MusicAlbum
  date published: 2025-03-14
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: DEE861500257
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5493920428623610605b7a2fc3eae0972feb70829f91094f76f1bf0ed9f80315
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960327
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960327
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861500257
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T00:26:26Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5493920428623610605b7a2fc3eae0972feb70829f91094f76f1bf0ed9f80315. 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/DEE861500257.
  date published: 2026-07-31T00:26:26Z
audio: Allegretto in D Major, K. 15o
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 90.73
  additional property: Musical Key
    type: PropertyValue
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Menuet in A Major, K. 15i
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by artist: Wolfgang Amadeus Mozart
by artist: Martin Stadtfeld
in album: Mozart Sleep
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  date published: 2025-03-14
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T01:10:20Z
audio: Menuet in A Major, K. 15i
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Concerto for Horn and Orchestra in E-Flat Major, K. 495: II. Romanza. Andante
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by artist: Will Sanders
by artist: Michael Gielen
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T05:43:45Z
audio: Concerto for Horn and Orchestra in E-Flat Major, K. 495: II. Romanza. Andante
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Andante in B-Flat Major, K. 15ii
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by artist: Wolfgang Amadeus Mozart
by artist: Martin Stadtfeld
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genre: classical
genre: classical-era
genre: classical-piano
genre: opera
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Andante in B-Flat Major, K. 15ii
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Larghetto & Allegro for 2 Pianos in E-Flat Major, K. deest: I. Larghetto
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by artist: Tal & Groethuysen
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genre: classical-era
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Larghetto & Allegro for 2 Pianos in E-Flat Major, K. deest: I. Larghetto
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Violin Concerto No. 2 in D Major, K. 211: III. Rondeau: Allegro
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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
audio: Violin Concerto No. 2 in D Major, K. 211: III. Rondeau: Allegro
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Menuet in F Major, K. 15m
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T08:26:41Z
audio: Menuet in F Major, K. 15m
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Piano Sonata No. 16 in C Major, K. 545 "Sonata facile" (Transcribed for Harp by Xavier de Maistre): III. Rondo
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T02:51:48Z
audio: Piano Sonata No. 16 in C Major, K. 545 "Sonata facile" (Transcribed for Harp by Xavier de Maistre): III. Rondo
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Adagio in E-Flat Major, K. 15kk
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Eine Kleine Nachtmusik Variation (From Serenade No. 13, K. 525, Arr. for Piano by Svetoslav Karparov)
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Eine Kleine Nachtmusik Variation (From Serenade No. 13, K. 525, Arr. for Piano by Svetoslav Karparov)
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Allegretto in B-Flat Major, K. 15aa
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T08:30:10Z
audio: Allegretto in B-Flat Major, K. 15aa
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Symphony No. 11 in D Major, K. 84 (73q): II. Andante
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Piano Concerto No. 21 in C Major, K. 467, "Elvira Madigan": II. Andante
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Violin Concerto No. 1 in B-Flat Major, K. 207: III. Presto
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subject of: OpenTimestamps Proof of Existence
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Piano Sonata No. 16 in C Major, K. 545: II. Andante
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duration ms: 321870
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Olga Scheps
in album: Mozart Sleep
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  date published: 2025-03-14
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: DEE862101664
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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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337bf31041086e2b83d4ebc2661f73d5a05a5f4c90a7131f8c1ed9a4c3b1edaa. 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/DEE862101664.
  date published: 2026-07-08T03:20:19Z
audio: Piano Sonata No. 16 in C Major, K. 545: II. Andante
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Serenade No. 13 in G Major, K. 525 "Eine kleine Nachtmusik": IV. Rondo. Allegretto
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duration: PT5M27S
duration ms: 327053
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Collegium Aureum
by artist: Franzjosef Maier
in album: Mozart Sleep
  type: MusicAlbum
  date published: 2025-03-14
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
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additional property: CopyrightID
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  date published: 2026-07-31T12:24:41Z
audio: Serenade No. 13 in G Major, K. 525 "Eine kleine Nachtmusik": IV. Rondo. Allegretto
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Quintet for Clarinet and Strings in A Major, K. 581: II. Larghetto
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duration: PT5M49S
duration ms: 349520
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: David Orlowsky
by artist: Vogler String Quartet
in album: Mozart Sleep
  type: MusicAlbum
  date published: 2025-03-14
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: DEE861001788
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
additional property: CopyrightChainExplorerURL
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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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333b01b0df4b2396f65a5b8f590cb57f79c6fbbced28b7d3060119092b50a7c5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861001788.
  date published: 2026-07-29T19:35:34Z
audio: Quintet for Clarinet and Strings in A Major, K. 581: II. Larghetto
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Clarinet Concerto in A Major, K. 622: Adagio
type: MusicRecording
duration: PT9M25S
duration ms: 565253
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Richard Stoltzman
by artist: English Chamber Orchestra
in album: Mozart Sleep
  type: MusicAlbum
  date published: 2025-03-14
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: USBC19000153
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: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
  type: PropertyValue
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d87ecfa1e791b3a9b634bc6bd59d4686303a8b6de4fd43d09ed6a246b7fab3. 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/USBC19000153.
  date published: 2026-07-08T03:20:19Z
audio: Clarinet Concerto in A Major, K. 622: Adagio
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  additional property: Tempo (BPM)
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Symphony No. 5 in B-Flat Major, K. 22: II. Andante
type: MusicRecording
duration: PT2M10S
duration ms: 130920
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Nikolaus Harnoncourt
in album: Mozart Sleep
  type: MusicAlbum
  date published: 2025-03-14
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: DEE470400490
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f54b5fa939e3c981219bb4a0f2cf7a4d64155d9d02f7f68de4841e3cf0fb4a. 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/DEE470400490.
  date published: 2026-07-31T00:26:26Z
audio: Symphony No. 5 in B-Flat Major, K. 22: II. Andante
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Acousticness
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  additional property: Valence (Positivity)
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Symphony No. 41 in C Major, K. 551, "Jupiter": III. Menuetto: Allegretto
type: MusicRecording
duration: PT5M22S
duration ms: 322200
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Günter Wand
in album: Mozart Sleep
  type: MusicAlbum
  date published: 2025-03-14
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: DEE470100454
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: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
  type: PropertyValue
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0455b5610b64323ba8d37216b99b965ea1f06d9d2de94f139c629a7b0b05b7. 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/DEE470100454.
  date published: 2026-07-08T03:22:41Z
audio: Symphony No. 41 in C Major, K. 551, "Jupiter": III. Menuetto: Allegretto
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Violin Concerto No. 2 in D Major, K. 211: III. Rondeau. Allegro
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duration: PT4M36S
duration ms: 276960
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Josef Suk
by artist: Prague Chamber Orchestra
by artist: Libor Hlaváček
in album: Mozart Sleep
  type: MusicAlbum
  date published: 2025-03-14
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: DEE477200024
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additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Violin Concerto No. 2 in D Major, K. 211: III. Rondeau. Allegro
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Symphony No. 16 in C Major, K. 128: II. Andante grazioso
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by artist: Nikolaus Harnoncourt
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Symphony No. 16 in C Major, K. 128: II. Andante grazioso
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Piano Concerto No. 20 in D Minor, K. 466: II. Romance
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by artist: Bruno Weil
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T06:58:00Z
audio: Piano Concerto No. 20 in D Minor, K. 466: II. Romance
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Rondo for Violin and Orchestra in C Major, K. 373
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T00:26:26Z
audio: Rondo for Violin and Orchestra in C Major, K. 373
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Serenade No. 7 in D Major, K. 250/K. 248b "Haffner": III. Menuetto
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T08:26:41Z
audio: Serenade No. 7 in D Major, K. 250/K. 248b "Haffner": III. Menuetto
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Symphony No. 29 in A Major, K. 201: I. Allegro moderato
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by artist: Bruno Walter
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Symphony No. 29 in A Major, K. 201: I. Allegro moderato
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Symphony No. 8 in D Major, K. 48: II. Andante
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T15:20:15Z
audio: Symphony No. 8 in D Major, K. 48: II. Andante
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Allegro in D Major, K. 15d
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861500250
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T15:59:18Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6350eca2c24cb35aa468b1ea4a003ba2868a0d1da66ca24b9037a60d1107d2e9. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DEE861500250.
  date published: 2026-07-31T15:59:18Z
audio: Allegro in D Major, K. 15d
  type: AudioObject
  additional property: Tempo (BPM)
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    value: 136.911
  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
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  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
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    value: 0.989
  additional property: Instrumentalness
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    value: 0.926
  additional property: Liveness
    type: PropertyValue
    value: 0.11
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.261
  additional property: Loudness (dB)
    type: PropertyValue
    value: -27.089
  additional property: Key Name
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    value: D
  additional property: Mode Name
    type: PropertyValue
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"A Bright Sunday" with Mozart
type: MusicAlbum
date published: 2024-12-08
track: Concerto for Flute, Harp, and Orchestra in C Major, K. 299: 2b. Andantino - Pt. 2
  type: MusicRecording
  duration: PT0M37S
  duration ms: 37146
  explicit: false
  by artist: Wolfgang Amadeus Mozart
  by artist: Libor Hlaváček
  by artist: Prague Chamber Orchestra
  by artist: Maxence Larrieu
  by artist: Suzanne Mildonian
  in album: "A Bright Sunday" with Mozart
    type: MusicAlbum
    date published: 2024-12-08
  genre: classical
  genre: classical-era
  genre: classical-piano
  genre: opera
  genre: chamber-music
  genre: concerto
  isrc code: FRUM72200486
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-06T09:39:51+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x7d5338c69b1173043af9bfb7e13c487b33a35424f8540dd1fbe839e07eecf71b
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957061
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957061
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRUM72200486
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-07T16:07:00Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5338c69b1173043af9bfb7e13c487b33a35424f8540dd1fbe839e07eecf71b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRUM72200486.
    date published: 2026-07-07T16:07:00Z
  audio: Concerto for Flute, Harp, and Orchestra in C Major, K. 299: 2b. Andantino - Pt. 2
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 123.576
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
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    additional property: Energy
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    additional property: Speechiness
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    additional property: Acousticness
      type: PropertyValue
      value: 0.982
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.879
    additional property: Liveness
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    additional property: Valence (Positivity)
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    additional property: Loudness (dB)
      type: PropertyValue
      value: -27.442
    additional property: Key Name
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    additional property: Mode Name
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      value: Major
track: 6 Variations for Violin and Piano on "Hélas, j'ai perdu mon amant", K. 360: Theme. Andantino
  type: MusicRecording
  duration: PT0M59S
  duration ms: 59280
  explicit: false
  by artist: Wolfgang Amadeus Mozart
  by artist: Arthur Grumiaux
  by artist: Walter Klien
  in album: "A Bright Sunday" with Mozart
    type: MusicAlbum
    date published: 2024-12-08
  genre: classical
  genre: classical-era
  genre: classical-piano
  genre: opera
  genre: chamber-music
  genre: concerto
  isrc code: NLA508021004
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x6ba031cdb16a29ca45368caebb76c911844d94f5c3c69c4b865c1202e3c3c86d
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960236
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960236
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA508021004
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-30T09:37:10Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba031cdb16a29ca45368caebb76c911844d94f5c3c69c4b865c1202e3c3c86d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/NLA508021004.
    date published: 2026-07-30T09:37:10Z
  audio: 6 Variations for Violin and Piano on "Hélas, j'ai perdu mon amant", K. 360: Theme. Andantino
    type: AudioObject
    additional property: Tempo (BPM)
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      value: 110.301
    additional property: Musical Key
      type: PropertyValue
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    additional property: Mode (Major/Minor)
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    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
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    additional property: Energy
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    additional property: Speechiness
      type: PropertyValue
      value: 0.051
    additional property: Acousticness
      type: PropertyValue
      value: 0.992
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.008
    additional property: Liveness
      type: PropertyValue
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    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.441
    additional property: Loudness (dB)
      type: PropertyValue
      value: -29.085
    additional property: Key Name
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      value: G
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: 6 Variations for Violin and Piano on "Hélas, j'ai perdu mon amant", K. 360: Var. 2
  type: MusicRecording
  duration: PT1M0S
  duration ms: 60026
  explicit: false
  by artist: Wolfgang Amadeus Mozart
  by artist: Arthur Grumiaux
  by artist: Walter Klien
  in album: "A Bright Sunday" with Mozart
    type: MusicAlbum
    date published: 2024-12-08
  genre: classical
  genre: classical-era
  genre: classical-piano
  genre: opera
  genre: chamber-music
  genre: concerto
  isrc code: NLA508021006
  additional property: CopyrightID
  additional property: CopyrightStatus
  additional property: CopyrightRegisteredAt
  additional property: CopyrightChainExplorerURL
  additional property: OTSHash
  additional property: OTSBitcoinBlock
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: 6 Variations for Violin and Piano on "Hélas, j'ai perdu mon amant", K. 360: Var. 2
track: 6 Variations for Violin and Piano on "Hélas, j'ai perdu mon amant", K. 360: Var. 3
track: 6 Variations for Violin and Piano on "Hélas, j'ai perdu mon amant", K. 360: Var. 4
track: 6 Variations for Violin and Piano on "Hélas, j'ai perdu mon amant", K. 360: Var. 5. Maggiore

CopyrightID
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CopyrightStatus
type: PropertyValue
value: registered

CopyrightRegisteredAt
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CopyrightChainExplorerURL
type: PropertyValue
value: https://explorer.copyrightchains.com/tx/0x15812d668ab2ea389706ce4d784de7dd197e0e624cf6d98af996c32a9e519785

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 960352

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/960352

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA508021006

OTSTimestamp
type: PropertyValue
value: 2026-07-31T05:48:30Z

OTSVerifyInstructions
type: PropertyValue
value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15812d668ab2ea389706ce4d784de7dd197e0e624cf6d98af996c32a9e519785. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/NLA508021006.
date published: 2026-07-31T05:48:30Z

6 Variations for Violin and Piano on "Hélas, j'ai perdu mon amant", K. 360: Var. 2
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 109.157
additional property: Musical Key
  type: PropertyValue
  value: 0
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 0
additional property: Time Signature
  type: PropertyValue
  value: 5
additional property: Danceability
  type: PropertyValue
  value: 0.336
additional property: Energy
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  value: 0.089
additional property: Speechiness
  type: PropertyValue
  value: 0.049
additional property: Acousticness
  type: PropertyValue
  value: 0.987
additional property: Instrumentalness
  type: PropertyValue
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additional property: Liveness
  type: PropertyValue
  value: 0.124
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.373
additional property: Loudness (dB)
  type: PropertyValue
  value: -25.371
additional property: Key Name
  type: PropertyValue
  value: C
additional property: Mode Name
  type: PropertyValue
  value: Minor

6 Variations for Violin and Piano on "Hélas, j'ai perdu mon amant", K. 360: Var. 3
type: MusicRecording
duration: PT0M59S
duration ms: 59706
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Arthur Grumiaux
by artist: Walter Klien
in album: "A Bright Sunday" with Mozart
  type: MusicAlbum
  date published: 2024-12-08
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: NLA508021007
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-30T22:59:59+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x696b1d5a7669135374d030910062c96e7494e187cd277922ba27ee4d09e652e6
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960327
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA508021007
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T00:26:26Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696b1d5a7669135374d030910062c96e7494e187cd277922ba27ee4d09e652e6. 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/NLA508021007.
  date published: 2026-07-31T00:26:26Z
audio: 6 Variations for Violin and Piano on "Hélas, j'ai perdu mon amant", K. 360: Var. 3
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 105.786
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.457
  additional property: Energy
    type: PropertyValue
    value: 0.051
  additional property: Speechiness
    type: PropertyValue
    value: 0.043
  additional property: Acousticness
    type: PropertyValue
    value: 0.992
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.671
  additional property: Liveness
    type: PropertyValue
    value: 0.188
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.482
  additional property: Loudness (dB)
    type: PropertyValue
    value: -25.552
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Minor

6 Variations for Violin and Piano on "Hélas, j'ai perdu mon amant", K. 360: Var. 4
type: MusicRecording
duration: PT0M58S
duration ms: 58333
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Arthur Grumiaux
by artist: Walter Klien
in album: "A Bright Sunday" with Mozart
  type: MusicAlbum
  date published: 2024-12-08
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: NLA508021008
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x15381eef99d46d52231dd15be5ad996a7aa3382ffab159183624a9081cdef82e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960273
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960273
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA508021008
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T15:42:38Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15381eef99d46d52231dd15be5ad996a7aa3382ffab159183624a9081cdef82e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA508021008.
  date published: 2026-07-30T15:42:38Z
audio: 6 Variations for Violin and Piano on "Hélas, j'ai perdu mon amant", K. 360: Var. 4
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 137.276
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.355
  additional property: Energy
    type: PropertyValue
    value: 0.069
  additional property: Speechiness
    type: PropertyValue
    value: 0.047
  additional property: Acousticness
    type: PropertyValue
    value: 0.99
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.508
  additional property: Liveness
    type: PropertyValue
    value: 0.14
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.473
  additional property: Loudness (dB)
    type: PropertyValue
    value: -28.251
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Minor

6 Variations for Violin and Piano on "Hélas, j'ai perdu mon amant", K. 360: Var. 5. Maggiore
type: MusicRecording
duration: PT1M0S
duration ms: 60333
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Arthur Grumiaux
by artist: Walter Klien
in album: "A Bright Sunday" with Mozart
  type: MusicAlbum
  date published: 2024-12-08
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: NLA508021009
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x527b47924e9212b7cd30c77241ca766466b822ca10379f41c802481d9b402927
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960291
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960291
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA508021009
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T18:23:33Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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