Martin Stadtfeld
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genre: classical
genre: classical piano
description: Martin Stadtfeld (born 19 November 1980) is a German pianist. Stadtfeld gave his first concert at age 9, and at age 14 enrolled at the Frankfurt University of Music and Performing Arts in Frankfurt u
popularity: 47
followers: 6178
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subject of: OpenTimestamps Proof of Existence
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album: W. A. Mozart: Klavierkonzerte 20 & 24
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album: Baroque Colours
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    by artist: Martin Stadtfeld
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    genre: early-music
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-22T12:33:25Z
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  track: Piano Improvisation 1 (After Prelude from Neue Clavier-Übung I, Partie V)
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    subject of: OpenTimestamps Proof of Existence
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album: Christmas Piano II
album: Genesis
album: Piano Folk Songs
album: Deutsche Volkslieder
album: Christmas Piano
album: Piano Songbook
album: My Beethoven / Mein Beethoven
album: Beethoven für Kinder
album: Handel Variations
album: Homage to Bach
album: Brigitte Klassik zum Genießen: Martin Stadtfeld
album: Chopin +
album: Mozart: Piano Concertos Nos. 1 & 9, Pieces from London Sketchbook
album: Schumann
album: Wie schön leuchtet der Morgenstern - Der junge Bach
album: Bach: Englische Suiten 1-3
album: Bach: Gambensonaten
album: Mendelssohn: Piano Concerto No. 1 & Solo Works
album: Mendelssohn Klavierkonzert Nr. 1 & Solowerke
album: Bach: Piano Concertos Vol. 2
album: Deutsche Romantik
album: Der junge Beethoven
album: Martin Stadtfeld über Bach "Das Wohltemperierte Klavier"
album: Bach: The Well-Tempered Piano I
album: Schubert: Piano Sonatas
album: Bach: Piano Concertos
album: J. S. Bach: Klavierkonzerte
album: Bach Pur
album: Bach: Goldbergvariationen
album: Have Yourself a Merry Little Christmas (Arr. for Piano by Martin Stadtfeld)
album: Lonely Christmas (After Mendelssohn: Hark! The Herald Angels Sing, Arr. for Piano by Martin Stadtfeld)
album: Veni, veni, Emanuel I
album: Händel Pifa (After Messiah, HWV 56, Arr. for Piano by Martin Stadtfeld)
album: Mozart Variation III (After 12 Variationen über Ah, vous dirai-je Maman/Morgen kommt der Weihnachtsmann, K.265, Arr. for Piano by Martin Stadtfeld)
album: Canon, P.37 (Arr. for Piano four hands by Martin Stadtfeld)
album: Armide, LWV 71, Act V: Passacaglia (Arr. for Piano four hands by Martin Stadtfeld)
album: Handel: Praise (After Israel in Egypt, HWV 54: Dank sei Dir, Herr) [Short Version]
album: Vivaldi: Four Seasons Winter Variation (After Violin Concerto in F Minor, Op. 8, No. 4, RV 297, III. Allegro-Lento) [Extended Version]

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Christmas Piano II
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date published: 2024-11-01
track: Krippelied "Es wird scho glei dumpa"
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-06-13T13:32:09Z
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Genesis
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Piano Folk Songs
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Deutsche Volkslieder
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Christmas Piano
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Piano Songbook
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track: Hymn (After a Theme from Zadok the Priest, HWV 258)
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-06-13T13:32:09Z
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track: Folk Song (After "Dumka" from Piano Quintet in A Major, Op. 81/B.155, No. 2)
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-06-13T12:47:07Z
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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: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
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track: Piano Songs: No. 10 Lullaby

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value: https://explorer.copyrightchains.com/tx/0x5b95c1cd2f3002c5cc5702770da55e0933dca7e07d43c0c327757925eaa26b91

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OTSBitcoinBlock
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value: 956302

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/956302

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862002981

OTSTimestamp
type: PropertyValue
value: 2026-07-02T03:30:09Z

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 0x5b95c1cd2f3002c5cc5702770da55e0933dca7e07d43c0c327757925eaa26b91. 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/DEE862002981.
date published: 2026-07-02T03:30:09Z

Piano Songs: No. 1 Lullaby
type: AudioObject
additional property: Tempo (BPM)
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additional property: Musical Key
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additional property: Mode (Major/Minor)
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additional property: Time Signature
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additional property: Danceability
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additional property: Energy
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additional property: Speechiness
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additional property: Acousticness
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additional property: Instrumentalness
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additional property: Liveness
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additional property: Valence (Positivity)
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additional property: Loudness (dB)
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additional property: Key Name
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additional property: Mode Name
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Piano Songs: No. 10 Lullaby
type: MusicRecording
duration: PT1M39S
duration ms: 99920
explicit: false
by artist: Martin Stadtfeld
in album: Piano Songbook
  type: MusicAlbum
  date published: 2021-04-09
genre: classical
genre: classical-piano
isrc code: DEE862002990
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862002990
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 0xe69bc2f337f3dbbeea3d7c085016fc802edec477857cf57dba2dce1b61f6b57d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862002990.
  date published: 2026-07-02T03:55:08Z
audio: Piano Songs: No. 10 Lullaby
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Acousticness
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  additional property: Valence (Positivity)
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My Beethoven / Mein Beethoven
type: MusicAlbum
date published: 2020-06-05

Beethoven für Kinder
type: MusicAlbum
date published: 2020-04-10

Handel Variations
type: MusicAlbum
date published: 2019-11-08
track: Giulio Cesare, HWV 17: Se pieta de mi non senti (Arr. for Piano)
  type: MusicRecording
  duration: PT1M45S
  duration ms: 105200
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  by artist: George Frideric Handel
  by artist: Martin Stadtfeld
  in album: Handel Variations
    type: MusicAlbum
    date published: 2019-11-08
  genre: classical
  genre: early-music
  genre: baroque
  genre: english-baroque
  genre: german-baroque
  isrc code: DEE861903527
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
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  additional property: OTSBitcoinBlock
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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/DEE861903527
  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 0x22bf7556556e5e442dbac9e9ab32cfcfb159ffe9768be0dfce376a93ccabbb94. 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/DEE861903527.
    date published: 2026-07-02T03:30:09Z
  audio: Giulio Cesare, HWV 17: Se pieta de mi non senti (Arr. for Piano)
    type: AudioObject
    additional property: Tempo (BPM)
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    additional property: Musical Key
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    additional property: Mode (Major/Minor)
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    additional property: Time Signature
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    additional property: Danceability
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    additional property: Speechiness
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track: Trio Sonata in G Major, HWV 399, Op. 5 No. 4: III. Passacaille (Arr. for Piano)
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  duration: PT6M9S
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  explicit: false
  by artist: George Frideric Handel
  by artist: Martin Stadtfeld
  in album: Handel Variations
    type: MusicAlbum
    date published: 2019-11-08
  genre: classical
  genre: early-music
  genre: baroque
  genre: english-baroque
  genre: german-baroque
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  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861903529
  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 0xc1c7386614c6e5c6ffe8467f54e09b20b37ba80630dd4a72a2743f70ecf3cdfc. 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/DEE861903529.
    date published: 2026-07-02T03:30:09Z
  audio: Trio Sonata in G Major, HWV 399, Op. 5 No. 4: III. Passacaille (Arr. for Piano)
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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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  type: MusicRecording
  duration: PT1M11S
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  by artist: George Frideric Handel
  by artist: Martin Stadtfeld
  in album: Handel Variations
    type: MusicAlbum
    date published: 2019-11-08
  genre: classical
  genre: early-music
  genre: baroque
  genre: english-baroque
  genre: german-baroque
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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: Suite in E Major: I. Prelude (from Suite in E Major, HWV 430)
track: Suite in E Major: II. Largo (from Theodora, HWV 68)
track: Solomon, HWV 67: Will the sun forget to streak (Arr. for Piano)
track: Sarabande Variations (from Suite in D Minor, HWV 437): Variation I
track: Sarabande Variations (from Suite in D Minor, HWV 437): Variation II
track: Sarabande Variations (from Suite in D Minor, HWV 437): Variation III
track: Sarabande Variations (from Suite in D Minor, HWV 437): Variation VI
track: Sarabande Variations (from Suite in D Minor, HWV 437): Variation VII
track: Sarabande Variations (from Suite in D Minor, HWV 437): Variation IX
track: Sarabande Variations (from Suite in D Minor, HWV 437): Variation X
track: Organ Concerto in F Major, HWV 293: III. Siciliano (Arr. for Piano)
track: Semele, HWV 58: Wher'er you walk (Arr. for Piano)
track: Giulio Cesare, HWV 17: Piangero la sorte mia (Arr. for Piano)

CopyrightStatus
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CopyrightRegisteredAt
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CopyrightChainExplorerURL
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OTSHash
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OTSBitcoinBlock
type: PropertyValue
value: 956304

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/956304

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861903531

OTSTimestamp
type: PropertyValue
value: 2026-07-02T03:55:08Z

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 0x7b88a019ca6ad1ac30ef3cd58ac31f42edc66ee2668db99673ecf84ed7228e1d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861903531.
date published: 2026-07-02T03:55:08Z

Suite in E Major: I. Prelude (from Suite in E Major, HWV 430)
type: AudioObject
additional property: Tempo (BPM)
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additional property: Musical Key
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additional property: Mode (Major/Minor)
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additional property: Energy
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additional property: Speechiness
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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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Suite in E Major: II. Largo (from Theodora, HWV 68)
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duration: PT1M56S
duration ms: 116933
explicit: false
by artist: George Frideric Handel
by artist: Martin Stadtfeld
in album: Handel Variations
  type: MusicAlbum
  date published: 2019-11-08
genre: classical
genre: early-music
genre: baroque
genre: english-baroque
genre: german-baroque
isrc code: DEE861903532
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861903532
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 0xb682a03b091ef391f9f9436f324c40b93bba1573c8f82b9999bbc91560e91364. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861903532.
  date published: 2026-07-02T03:55:08Z
audio: Suite in E Major: II. Largo (from Theodora, HWV 68)
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  additional property: Mode (Major/Minor)
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  additional property: Acousticness
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Solomon, HWV 67: Will the sun forget to streak (Arr. for Piano)
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duration: PT4M42S
duration ms: 282440
explicit: false
by artist: George Frideric Handel
by artist: Martin Stadtfeld
in album: Handel Variations
  type: MusicAlbum
  date published: 2019-11-08
genre: classical
genre: early-music
genre: baroque
genre: english-baroque
genre: german-baroque
isrc code: DEE861903539
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xfe2802292ef79617897160fea18d847b1f956f34ed95a9875ff5a446f8d6d661
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956304
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861903539
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
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 0xfe2802292ef79617897160fea18d847b1f956f34ed95a9875ff5a446f8d6d661. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861903539.
  date published: 2026-07-02T03:55:08Z
audio: Solomon, HWV 67: Will the sun forget to streak (Arr. for Piano)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 97.178
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.32
  additional property: Energy
    type: PropertyValue
    value: 0.014
  additional property: Speechiness
    type: PropertyValue
    value: 0.057
  additional property: Acousticness
    type: PropertyValue
    value: 0.993
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.939
  additional property: Liveness
    type: PropertyValue
    value: 0.07
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.137
  additional property: Loudness (dB)
    type: PropertyValue
    value: -37.466
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Sarabande Variations (from Suite in D Minor, HWV 437): Variation I
type: MusicRecording
duration: PT0M48S
duration ms: 48880
explicit: false
by artist: George Frideric Handel
by artist: Martin Stadtfeld
in album: Handel Variations
  type: MusicAlbum
  date published: 2019-11-08
genre: classical
genre: early-music
genre: baroque
genre: english-baroque
genre: german-baroque
isrc code: DEE861903541
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-26T15:45:33+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x598752b404baf364743ee93f80446a4a7ac2ce4bd07e2b4483b52f7cfc1da80e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956304
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861903541
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
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 0x598752b404baf364743ee93f80446a4a7ac2ce4bd07e2b4483b52f7cfc1da80e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861903541.
  date published: 2026-07-02T03:55:08Z
audio: Sarabande Variations (from Suite in D Minor, HWV 437): Variation I
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 167.154
  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: 0.324
  additional property: Energy
    type: PropertyValue
    value: 0.001
  additional property: Speechiness
    type: PropertyValue
    value: 0.277
  additional property: Acousticness
    type: PropertyValue
    value: 0.989
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.502
  additional property: Liveness
    type: PropertyValue
    value: 0.112
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0
  additional property: Loudness (dB)
    type: PropertyValue
    value: -51.569
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Sarabande Variations (from Suite in D Minor, HWV 437): Variation II
type: MusicRecording
duration: PT0M46S
duration ms: 46026
explicit: false
by artist: George Frideric Handel
by artist: Martin Stadtfeld
in album: Handel Variations
  type: MusicAlbum
  date published: 2019-11-08
genre: classical
genre: early-music
genre: baroque
genre: english-baroque
genre: german-baroque
isrc code: DEE861903542
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-25T14:57:32+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xceea6cd7a5a6e0fc062d72d74daf378e8e12c30fe2e73be7feb9032f6b51bb05
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956304
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861903542
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
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 0xceea6cd7a5a6e0fc062d72d74daf378e8e12c30fe2e73be7feb9032f6b51bb05. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861903542.
  date published: 2026-07-02T03:55:08Z
audio: Sarabande Variations (from Suite in D Minor, HWV 437): Variation II
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 166.929
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.534
  additional property: Energy
    type: PropertyValue
    value: 0.005
  additional property: Speechiness
    type: PropertyValue
    value: 0.095
  additional property: Acousticness
    type: PropertyValue
    value: 0.996
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.979
  additional property: Liveness
    type: PropertyValue
    value: 0.087
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.4
  additional property: Loudness (dB)
    type: PropertyValue
    value: -35.415
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Sarabande Variations (from Suite in D Minor, HWV 437): Variation III
type: MusicRecording
duration: PT0M41S
duration ms: 41920
explicit: false
by artist: George Frideric Handel
by artist: Martin Stadtfeld
in album: Handel Variations
  type: MusicAlbum
  date published: 2019-11-08
genre: classical
genre: early-music
genre: baroque
genre: english-baroque
genre: german-baroque
isrc code: DEE861903543
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-24T08:09:10+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x64919add239fc4ce280182facf4570441ff62baf504c9017bfa5d216aec7be09
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956304
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861903543
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
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 0x64919add239fc4ce280182facf4570441ff62baf504c9017bfa5d216aec7be09. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861903543.
  date published: 2026-07-02T03:55:08Z
audio: Sarabande Variations (from Suite in D Minor, HWV 437): Variation III
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 100.606
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.474
  additional property: Energy
    type: PropertyValue
    value: 0.163
  additional property: Speechiness
    type: PropertyValue
    value: 0.071
  additional property: Acousticness
    type: PropertyValue
    value: 0.995
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.878
  additional property: Liveness
    type: PropertyValue
    value: 0.097
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.328
  additional property: Loudness (dB)
    type: PropertyValue
    value: -25.693
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Sarabande Variations (from Suite in D Minor, HWV 437): Variation VI
type: MusicRecording
duration: PT1M7S
duration ms: 67533
explicit: false
by artist: George Frideric Handel
by artist: Martin Stadtfeld
in album: Handel Variations
  type: MusicAlbum
  date published: 2019-11-08
genre: classical
genre: early-music
genre: baroque
genre: english-baroque
genre: german-baroque
isrc code: DEE861903546
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-26T15:44:52+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd264411a0b9d365940927ec169e99a845cbcacdd05b8fcc8130ea9c62188db86
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956304
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861903546
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
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 0xd264411a0b9d365940927ec169e99a845cbcacdd05b8fcc8130ea9c62188db86. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861903546.
  date published: 2026-07-02T03:55:08Z
audio: Sarabande Variations (from Suite in D Minor, HWV 437): Variation VI
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 147.254
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.228
  additional property: Energy
    type: PropertyValue
    value: 0.418
  additional property: Speechiness
    type: PropertyValue
    value: 0.045
  additional property: Acousticness
    type: PropertyValue
    value: 0.99
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.949
  additional property: Liveness
    type: PropertyValue
    value: 0.128
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.258
  additional property: Loudness (dB)
    type: PropertyValue
    value: -21.894
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Sarabande Variations (from Suite in D Minor, HWV 437): Variation VII
type: MusicRecording
duration: PT0M43S
duration ms: 43040
explicit: false
by artist: George Frideric Handel
by artist: Martin Stadtfeld
in album: Handel Variations
  type: MusicAlbum
  date published: 2019-11-08
genre: classical
genre: early-music
genre: baroque
genre: english-baroque
genre: german-baroque
isrc code: DEE861903547
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-24T08:08:58+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe3713c2a4501df3c280a9376113ebe33ed8f2e700f8937585e1c375419254d23
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956304
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861903547
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
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 0xe3713c2a4501df3c280a9376113ebe33ed8f2e700f8937585e1c375419254d23. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861903547.
  date published: 2026-07-02T03:55:08Z
audio: Sarabande Variations (from Suite in D Minor, HWV 437): Variation VII
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 95.094
  additional property: Musical Key
    type: PropertyValue
    value: 6
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.453
  additional property: Energy
    type: PropertyValue
    value: 0.003
  additional property: Speechiness
    type: PropertyValue
    value: 0.051
  additional property: Acousticness
    type: PropertyValue
    value: 0.996
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.849
  additional property: Liveness
    type: PropertyValue
    value: 0.105
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.461
  additional property: Loudness (dB)
    type: PropertyValue
    value: -39.404
  additional property: Key Name
    type: PropertyValue
    value: F#
  additional property: Mode Name
    type: PropertyValue
    value: Major

Sarabande Variations (from Suite in D Minor, HWV 437): Variation IX
type: MusicRecording
duration: PT4M1S
duration ms: 241346
explicit: false
by artist: George Frideric Handel
by artist: Martin Stadtfeld
in album: Handel Variations
  type: MusicAlbum
  date published: 2019-11-08
genre: classical
genre: early-music
genre: baroque
genre: english-baroque
genre: german-baroque
isrc code: DEE861903549
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-25T14:57:26+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3b70a869b96ba454e5ee24dd64e114aed4aee3c0da8f1a02a73297a0e56e5cc4
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956304
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861903549
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
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 0x3b70a869b96ba454e5ee24dd64e114aed4aee3c0da8f1a02a73297a0e56e5cc4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861903549.
  date published: 2026-07-02T03:55:08Z
audio: Sarabande Variations (from Suite in D Minor, HWV 437): Variation IX
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 137.33
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.422
  additional property: Energy
    type: PropertyValue
    value: 0.24
  additional property: Speechiness
    type: PropertyValue
    value: 0.051
  additional property: Acousticness
    type: PropertyValue
    value: 0.99
  additional property: Instrumentalness
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Sarabande Variations (from Suite in D Minor, HWV 437): Variation X
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subject of: OpenTimestamps Proof of Existence
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Organ Concerto in F Major, HWV 293: III. Siciliano (Arr. for Piano)
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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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Semele, HWV 58: Wher'er you walk (Arr. for Piano)
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:30:09Z
audio: Semele, HWV 58: Wher'er you walk (Arr. for Piano)
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Giulio Cesare, HWV 17: Piangero la sorte mia (Arr. for Piano)
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:30:09Z
audio: Giulio Cesare, HWV 17: Piangero la sorte mia (Arr. for Piano)
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Homage to Bach
type: MusicAlbum
date published: 2018-10-12

Brigitte Klassik zum Genießen: Martin Stadtfeld
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Chopin +
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date published: 2016-11-04

Mozart: Piano Concertos Nos. 1 & 9, Pieces from London Sketchbook
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date published: 2015-09-11

Schumann
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  subject of: OpenTimestamps Proof of Existence
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Wie schön leuchtet der Morgenstern - Der junge Bach
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Bach: Englische Suiten 1-3
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  subject of: OpenTimestamps Proof of Existence
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Bach: Gambensonaten
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date published: 2013-10-04
track: Jesu meine Freude, BWV 610 (Choral Prelude, Arr. for Piano and Cello)
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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
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c9e0803abc878dc73d5ab618b30e92b73e5cc3806cb489c15a5e016407c548. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:11:11Z), 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/DEE860901171.
    date published: 2026-07-22T20:11:11Z
  audio: Jesu meine Freude, BWV 610 (Choral Prelude, Arr. for Piano and Cello)
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    additional property: Valence (Positivity)
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    additional property: Loudness (dB)
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Mendelssohn: Piano Concerto No. 1 & Solo Works
type: MusicAlbum
date published: 2013-01-11
track: Variations sérieuses, op. 54
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  duration ms: 713493
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  by artist: Martin Stadtfeld
  in album: Mendelssohn: Piano Concerto No. 1 & Solo Works
    type: MusicAlbum
    date published: 2013-01-11
  genre: classical
  genre: early-romantic-era
  genre: german-romanticism
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  additional property: CopyrightID
  additional property: CopyrightStatus
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  additional property: OTSBitcoinBlockVerifyURL
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  additional property: OTSVerificationAPI
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    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861200604
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:55:08Z
  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 0x03d91cd5e5f4d4b3a6b3b6ed13c08c0bc1a27d7a34cfb4062ee04e88faa932c9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861200604.
    date published: 2026-07-02T03:55:08Z
  audio: Variations sérieuses, op. 54
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    additional property: Tempo (BPM)
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    additional property: Musical Key
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    additional property: Danceability
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Mendelssohn Klavierkonzert Nr. 1 & Solowerke
type: MusicAlbum
date published: 2012-10-22

Bach: Piano Concertos Vol. 2
type: MusicAlbum
date published: 2011-10-17
track: 8 Short Preludes and Fugues: Fugue No. 7 in A Minor, BWV 559
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  duration: PT0M51S
  duration ms: 51066
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  by artist: Johann Sebastian Bach
  by artist: Martin Stadtfeld
  in album: Bach: Piano Concertos Vol. 2
    type: MusicAlbum
    date published: 2011-10-17
  genre: classical
  genre: classical-piano
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  additional property: OTSBitcoinBlockVerifyURL
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861101131
  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 0x038dda17e0a5c3d92d26c4431e497b14962bac604ea5194220410ad5c91f5dc5. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:49:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861101131.
    date published: 2026-07-22T20:49:27Z
  audio: 8 Short Preludes and Fugues: Fugue No. 7 in A Minor, BWV 559
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    additional property: Danceability
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    additional property: Valence (Positivity)
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track: 8 Short Preludes and Fugues: Prelude No. 4 in F Major, BWV 556
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  by artist: Johann Sebastian Bach
  by artist: Martin Stadtfeld
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    type: MusicAlbum
    date published: 2011-10-17
  genre: classical
  genre: classical-piano
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  additional property: CopyrightRegisteredAt
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  additional property: CopyrightChainExplorerURL
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861101132
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:55:08Z
  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 0xcd5f5da76a03fb07a8662cee5c60339b40525942abb9cf99e7392a810c1f5410. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861101132.
    date published: 2026-07-02T03:55:08Z
  audio: 8 Short Preludes and Fugues: Prelude No. 4 in F Major, BWV 556
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Deutsche Romantik
type: MusicAlbum
date published: 2010-10-18

Der junge Beethoven
type: MusicAlbum
date published: 2009-10-15

Martin Stadtfeld über Bach "Das Wohltemperierte Klavier"
type: MusicAlbum
date published: 2009-02-02

Bach: The Well-Tempered Piano I
type: MusicAlbum
date published: 2009-01-23
track: The Well-Tempered Clavier, Book I: Fugue No. 3 in C-Sharp Major, BWV 848
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  by artist: Johann Sebastian Bach
  by artist: Martin Stadtfeld
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  genre: classical
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  additional property: OTSVerificationAPI
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  additional property: OTSTimestamp
    type: PropertyValue
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  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8edd3c2757fabf7319afe07db30e129f10c673bec6d49025181c661f1d8bf7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE860800781.
    date published: 2026-07-02T03:55:08Z
  audio: The Well-Tempered Clavier, Book I: Fugue No. 3 in C-Sharp Major, BWV 848
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    additional property: Time Signature
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    additional property: Danceability
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    additional property: Energy
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    additional property: Speechiness
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    additional property: Acousticness
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track: The Well-Tempered Clavier, Book I: Prelude No. 4 in C-Sharp Minor, BWV 849
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  by artist: Johann Sebastian Bach
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    type: MusicAlbum
    date published: 2009-01-23
  genre: classical
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  additional property: OTSVerificationAPI
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  additional property: OTSTimestamp
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  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0xcdb6515a9e9ee01221f559511311a1a113aab141d620a3b11febd3947a43e6cc. 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/DEE860800782.
    date published: 2026-07-02T03:30:09Z
  audio: The Well-Tempered Clavier, Book I: Prelude No. 4 in C-Sharp Minor, BWV 849
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    additional property: Mode (Major/Minor)
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  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: The Well-Tempered Clavier, Book I: Prelude No. 7 in E-Flat Major, BWV 852
track: The Well-Tempered Clavier, Book I: Fugue No. 8 in E-Flat Minor, BWV 853
track: The Well-Tempered Clavier, Book I: Prelude No. 13 in F-Sharp Major, BWV 858
track: The Well-Tempered Clavier, Book I: Prelude No. 15 in G Major, BWV 860
track: The Well-Tempered Clavier, Book I: Prelude No. 16 in G Minor, BWV 861

OTSHash
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OTSBitcoinBlock
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value: 956304

OTSBitcoinBlockVerifyURL
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value: https://blockstream.info/api/block-height/956304

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE860800788

OTSTimestamp
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value: 2026-07-02T03:55:08Z

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

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

The Well-Tempered Clavier, Book I: Prelude No. 7 in E-Flat Major, BWV 852
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The Well-Tempered Clavier, Book I: Fugue No. 8 in E-Flat Minor, BWV 853
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The Well-Tempered Clavier, Book I: Prelude No. 13 in F-Sharp Major, BWV 858
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  date published: 2026-07-02T03:55:08Z
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The Well-Tempered Clavier, Book I: Prelude No. 15 in G Major, BWV 860
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The Well-Tempered Clavier, Book I: Prelude No. 16 in G Minor, BWV 861
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Schubert: Piano Sonatas
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Bach: Piano Concertos
type: MusicAlbum
date published: 2007-03-02

J. S. Bach: Klavierkonzerte
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Bach Pur
type: MusicAlbum
date published: 2004-10-18

Bach: Goldbergvariationen
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Have Yourself a Merry Little Christmas (Arr. for Piano by Martin Stadtfeld)
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date published: 2024-10-18

Lonely Christmas (After Mendelssohn: Hark! The Herald Angels Sing, Arr. for Piano by Martin Stadtfeld)
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date published: 2024-10-04

Veni, veni, Emanuel I
type: MusicAlbum
date published: 2024-09-20

Händel Pifa (After Messiah, HWV 56, Arr. for Piano by Martin Stadtfeld)
type: MusicAlbum
date published: 2024-09-06

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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Canon, P.37 (Arr. for Piano four hands by Martin Stadtfeld)
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Armide, LWV 71, Act V: Passacaglia (Arr. for Piano four hands by Martin Stadtfeld)
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