Zuzana Růžičková
type: MusicGroup
genre: chamber music
description: Zuzana Růžičková (; 14 January 1927 – 27 September 2017) was a Czech harpsichordist. An interpreter of classical and baroque music, Růžičková was the first harpsichordist to record Johann Sebastian Ba
popularity: 9
followers: 1160
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x759e4f721d85dfee4acc6a76a70e75126d032fc0cb0ce0ae34a2a6198564dd78
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954615
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954615
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c4c7be5a-6062-46b4-b2e0-dcfeaadcfe5d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c4c7be5a-6062-46b4-b2e0-dcfeaadcfe5d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c4c7be5a-6062-46b4-b2e0-dcfeaadcfe5d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T22:44:50Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x759e4f721d85dfee4acc6a76a70e75126d032fc0cb0ce0ae34a2a6198564dd78","name":"Zuzana Růžičková","registered_at":"2026-06-20T20:42:52Z","symbol":"NIM1710078","token_address":"0x4a49f6b17625920af65cc59b143b4e6a534655f2","type":"artist","uuid":"c4c7be5a-6062-46b4-b2e0-dcfeaadcfe5d"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 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. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin 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 0x759e4f721d85dfee4acc6a76a70e75126d032fc0cb0ce0ae34a2a6198564dd78. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4c7be5a-6062-46b4-b2e0-dcfeaadcfe5d.json and https://artists.proofprofile.net/proofs/artist/c4c7be5a-6062-46b4-b2e0-dcfeaadcfe5d.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-20T22:44:50Z
  text: {"copyright_id":"0x759e4f721d85dfee4acc6a76a70e75126d032fc0cb0ce0ae34a2a6198564dd78","name":"Zuzana Růžičková","registered_at":"2026-06-20T20:42:52Z","symbol":"NIM1710078","token_address":"0x4a49f6b17625920af65cc59b143b4e6a534655f2","type":"artist","uuid":"c4c7be5a-6062-46b4-b2e0-dcfeaadcfe5d"}
album: Joseph Suk Plays Bach
  type: MusicAlbum
  date published: 2020-05-02
album: Classic for You: Bach: Sonaten für Flöte und Cembalo
  type: MusicAlbum
  date published: 2013-04-26
  track: Sonate in E-Flat Major BWV 1031: I. Allegro moderato
    type: MusicRecording
    duration: PT3M37S
    duration ms: 217400
    explicit: false
    by artist: Juraj Alexander
    by artist: Milos Jurkovic
    by artist: Zuzana Růžičková
    in album: Classic for You: Bach: Sonaten für Flöte und Cembalo
      type: MusicAlbum
      date published: 2013-04-26
    isrc code: DEA540300647
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-07T10:16:23+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x00bb65dc87181dc5a92227ccad950e66be0fa5ef3410002052ac2396d4d9e71e
    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/DEA540300647
    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 0x00bb65dc87181dc5a92227ccad950e66be0fa5ef3410002052ac2396d4d9e71e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA540300647 — a six-check JSON result.
      date published: 2026-07-08T03:20:19Z
    audio: Sonate in E-Flat Major BWV 1031: I. Allegro moderato
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 105.599
      additional property: Musical Key
        type: PropertyValue
        value: 3
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 5
      additional property: Danceability
        type: PropertyValue
        value: 0.481
      additional property: Energy
        type: PropertyValue
        value: 0.185
      additional property: Speechiness
        type: PropertyValue
        value: 0.034
      additional property: Acousticness
        type: PropertyValue
        value: 0.592
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.09
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.856
      additional property: Loudness (dB)
        type: PropertyValue
        value: -27.276
      additional property: Key Name
        type: PropertyValue
        value: Eb
      additional property: Mode Name
        type: PropertyValue
        value: Major
  track: Sonate in E-Flat Major BWV 1031: II. Siciliano
    type: MusicRecording
    duration: PT2M53S
    duration ms: 173093
    explicit: false
    by artist: Juraj Alexander
    by artist: Zuzana Růžičková
    by artist: Milos Jurkovic
    in album: Classic for You: Bach: Sonaten für Flöte und Cembalo
      type: MusicAlbum
      date published: 2013-04-26
    isrc code: DEA540300648
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-07T03:10:09+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x0ede85a12e5bba3f64da83ddeb8cd931e37ac1ee5e39ff3d35a04345dd4a86ca
    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/DEA540300648
    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 0x0ede85a12e5bba3f64da83ddeb8cd931e37ac1ee5e39ff3d35a04345dd4a86ca. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA540300648 — a six-check JSON result.
      date published: 2026-07-08T03:20:19Z
    audio: Sonate in E-Flat Major BWV 1031: II. Siciliano
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 148.437
      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: 0.341
      additional property: Energy
        type: PropertyValue
        value: 0.017
      additional property: Speechiness
        type: PropertyValue
        value: 0.038
      additional property: Acousticness
        type: PropertyValue
        value: 0.979
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.058
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
  track: Sonate in E-Flat Major BWV 1031: III. Allegro
  track: Sonate in E Minor, BWV 1035: I. Adagio ma non tanto
  track: Sonate in E Minor, BWV 1035: II. Allegro
  track: Sonate in E Minor, BWV 1035: III. Siciliano
  track: Sonate in E Minor, BWV 1035: IV. Allegro assai
album: Bach: Sonatas, BWV 1030 - 1032 & BWV 1034 - 1035
album: J.S. Bach: Flute Sonata in E Minor, BWV 1034 (Digitally Remastered)
album: J.S. Bach: Flute Sonata in E Major, BWV 1035 (Digitally Remastered)
album: J.S. Bach: Flute Sonata in E-Flat Major, BWV 1031 (Digitally Remastered)
album: J.S. Bach: Flute Sonata in B Minor, BWV 1030 (Digitally Remastered)
album: J.S. Bach: Works for Cello & Harpsichord (Live)
album: Hlobil: Quartet, Op. 23 - Dvořák: Tercetto in C major, Op. 74
album: Haydn: Sonatas in D, E, F Major
album: Hlobil: Quartet for Harpsichord, Violin, Viola and Cello, Op. 23 - Kapr: String Quartet for 2 Violin, Viola and Cello No. 3
album: Zuzana Růžičková hraje Bacha, Rychlíka a Kalabise
album: Bach: Cello Sonatas
album: Zuzana Růžičková Plays Bach, Rychlík and Kalabis
album: J. S. Bach: The Well-Tempered Clavier, Book II BWV 870-893
album: J. S. Bach: The Well-Tempered Clavier, Book I BWV 846-869
album: Bach: Goldberg´s Variations
album: Englische Virginalisten
album: D. Scarlatti: Harpsichord Sonatas
album: J. S. Bach: Dobře temperovaný klavír II (BWV 870-893)
album: J. S. Bach: Dobře temperovaný klavír I (BWV 846-869)
album: Cembalo, Musik aus alten Schweizer Tabulaturen
album: Harpsichord Music from England, Spain and Portugal
album: Bach, Böhm, Lübeck, Scheidt, Pachelbel, Sweelinck and Buxtehude: Harpsichord Works
album: Martinů: Concertos for Oboe, Harpsichord and Piano No. 3
album: Hans Krása: Complete Chamber Music
album: Scarlatti: Harpsichord Sonatas
album: Johann Sebastian Bach: Sonatas BWV 1020, 1022, 1027-1029
album: Bach: The Well-Tempered Clavier
album: Bach: Harpsichord Works
album: Bach: Konzerte nach verschiedenen Meistern
album: Mozart: Violin Sonatas Nos. 2, 4, 6, 8, 10, 15 & 16
album: Bach: Harpsichord Concertos
album: Czech Baroque Harpsichord Works
album: Händel: Harpsichord Works
album: Bach: Concertos for Three and Four Harpsichords and Strings
album: Bach: The Complete Keyboard Works
album: Bach: 2 Konzerte für 3 Cembali und Streichorchester
album: Poulenc, martinů: harpsichord concertos
album: Harpsichord Music in 16th - 18th Century. Couperin: Pieces de clavecin
album: Harpsichord Music in 16th - 18th Century. Scarlatti: Pieces de clavecin
album: Bach: Harpsichord Concertos (BWV 1052 & BWV 1053)
album: Harpsichord Works (Byrd, Couperin, Daquin, Purcell, Rameau)

Liveness
type: PropertyValue
value: 0.11

Valence (Positivity)
type: PropertyValue
value: 0.315

Loudness (dB)
type: PropertyValue
value: -28.618

Key Name
type: PropertyValue
value: G

Mode Name
type: PropertyValue
value: Minor

Sonate in E-Flat Major BWV 1031: III. Allegro
type: MusicRecording
duration: PT4M45S
duration ms: 285493
explicit: false
by artist: Milos Jurkovic
by artist: Zuzana Růžičková
by artist: Juraj Alexander
in album: Classic for You: Bach: Sonaten für Flöte und Cembalo
  type: MusicAlbum
  date published: 2013-04-26
isrc code: DEA540300649
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T06:09:34+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xfc967937084e874b43ceb09d6e26f3aedbe1dd9f00b2ec7943f690e378e89fbe
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/DEA540300649
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 0xfc967937084e874b43ceb09d6e26f3aedbe1dd9f00b2ec7943f690e378e89fbe. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA540300649 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
audio: Sonate in E-Flat Major BWV 1031: III. Allegro
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 112.852
  additional property: Musical Key
    type: PropertyValue
    value: 3
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.585
  additional property: Energy
    type: PropertyValue
    value: 0.304
  additional property: Speechiness
    type: PropertyValue
    value: 0.038
  additional property: Acousticness
    type: PropertyValue
    value: 0.528
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.087
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.865
  additional property: Loudness (dB)
    type: PropertyValue
    value: -23.281
  additional property: Key Name
    type: PropertyValue
    value: Eb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Sonate in E Minor, BWV 1035: I. Adagio ma non tanto
type: MusicRecording
duration: PT2M22S
duration ms: 142040
explicit: false
by artist: Milos Jurkovic
by artist: Zuzana Růžičková
by artist: Juraj Alexander
in album: Classic for You: Bach: Sonaten für Flöte und Cembalo
  type: MusicAlbum
  date published: 2013-04-26
isrc code: DEA540300656
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T16:22:55+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3069958245a10602b09ad151ea4aec534cba433cfed3adcee65f7cf08b504ba7
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957124
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957124
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA540300656
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:53:27Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0x3069958245a10602b09ad151ea4aec534cba433cfed3adcee65f7cf08b504ba7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA540300656 — a six-check JSON result.
  date published: 2026-07-08T03:53:27Z
audio: Sonate in E Minor, BWV 1035: I. Adagio ma non tanto
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 100.563
  additional property: Musical Key
    type: PropertyValue
    value: 4
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.293
  additional property: Energy
    type: PropertyValue
    value: 0.046
  additional property: Speechiness
    type: PropertyValue
    value: 0.043
  additional property: Acousticness
    type: PropertyValue
    value: 0.839
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.005
  additional property: Liveness
    type: PropertyValue
    value: 0.21
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.344
  additional property: Loudness (dB)
    type: PropertyValue
    value: -24.539
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Major

Sonate in E Minor, BWV 1035: II. Allegro
type: MusicRecording
duration: PT3M10S
duration ms: 190933
explicit: false
by artist: Milos Jurkovic
by artist: Zuzana Růžičková
by artist: Juraj Alexander
in album: Classic for You: Bach: Sonaten für Flöte und Cembalo
  type: MusicAlbum
  date published: 2013-04-26
isrc code: DEA540300657
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T19:43:47+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3324e189ca6334ddadf17d99985a9973736bbd6a48cfe766c90959fa0a33d214
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960455
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960455
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA540300657
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T19:53:13Z
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 0x3324e189ca6334ddadf17d99985a9973736bbd6a48cfe766c90959fa0a33d214. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA540300657 — a six-check JSON result.
  date published: 2026-07-31T19:53:13Z
audio: Sonate in E Minor, BWV 1035: II. Allegro
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 121.152
  additional property: Musical Key
    type: PropertyValue
    value: 4
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.617
  additional property: Energy
    type: PropertyValue
    value: 0.221
  additional property: Speechiness
    type: PropertyValue
    value: 0.035
  additional property: Acousticness
    type: PropertyValue
    value: 0.572
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.091
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.962
  additional property: Loudness (dB)
    type: PropertyValue
    value: -20.943
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Major

Sonate in E Minor, BWV 1035: III. Siciliano
type: MusicRecording
duration: PT3M41S
duration ms: 221853
explicit: false
by artist: Milos Jurkovic
by artist: Zuzana Růžičková
by artist: Juraj Alexander
in album: Classic for You: Bach: Sonaten für Flöte und Cembalo
  type: MusicAlbum
  date published: 2013-04-26
isrc code: DEA540300658
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T21:01:24+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x68a83bf38c31488b4b15df6f1af4b9d2914242649c2258c03eaeec3baa0cbb92
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960468
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960468
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA540300658
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T21:25:57Z
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 0x68a83bf38c31488b4b15df6f1af4b9d2914242649c2258c03eaeec3baa0cbb92. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA540300658 — a six-check JSON result.
  date published: 2026-07-31T21:25:57Z
audio: Sonate in E Minor, BWV 1035: III. Siciliano
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 114.295
  additional property: Musical Key
    type: PropertyValue
    value: 1
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.274
  additional property: Energy
    type: PropertyValue
    value: 0.048
  additional property: Speechiness
    type: PropertyValue
    value: 0.045
  additional property: Acousticness
    type: PropertyValue
    value: 0.837
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.192
  additional property: Liveness
    type: PropertyValue
    value: 0.06
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.362
  additional property: Loudness (dB)
    type: PropertyValue
    value: -25.971
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Sonate in E Minor, BWV 1035: IV. Allegro assai
type: MusicRecording
duration: PT3M12S
duration ms: 192813
explicit: false
by artist: Milos Jurkovic
by artist: Zuzana Růžičková
by artist: Juraj Alexander
in album: Classic for You: Bach: Sonaten für Flöte und Cembalo
  type: MusicAlbum
  date published: 2013-04-26
isrc code: DEA540300659
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-08-01T03:11:59+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe55c2e66639328558eb374d6c6320c4a08ebafdc2169d1cd18fa472e98311dee
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960503
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960503
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA540300659
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-08-01T03:41:24Z
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 0xe55c2e66639328558eb374d6c6320c4a08ebafdc2169d1cd18fa472e98311dee. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA540300659 — a six-check JSON result.
  date published: 2026-08-01T03:41:24Z
audio: Sonate in E Minor, BWV 1035: IV. Allegro assai
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 120.653
  additional property: Musical Key
    type: PropertyValue
    value: 4
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.587
  additional property: Energy
    type: PropertyValue
    value: 0.207
  additional property: Speechiness
    type: PropertyValue
    value: 0.042
  additional property: Acousticness
    type: PropertyValue
    value: 0.663
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.164
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.961
  additional property: Loudness (dB)
    type: PropertyValue
    value: -22.651
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Major

Bach: Sonatas, BWV 1030 - 1032 & BWV 1034 - 1035
type: MusicAlbum
date published: 2006

J.S. Bach: Flute Sonata in E Minor, BWV 1034 (Digitally Remastered)
type: MusicAlbum
date published: 2012-11-06

J.S. Bach: Flute Sonata in E Major, BWV 1035 (Digitally Remastered)
type: MusicAlbum
date published: 2012-11-06

J.S. Bach: Flute Sonata in E-Flat Major, BWV 1031 (Digitally Remastered)
type: MusicAlbum
date published: 2012-10-30

J.S. Bach: Flute Sonata in B Minor, BWV 1030 (Digitally Remastered)
type: MusicAlbum
date published: 2012-10-30

J.S. Bach: Works for Cello & Harpsichord (Live)
type: MusicAlbum
date published: 2015-05-05

Hlobil: Quartet, Op. 23 - Dvořák: Tercetto in C major, Op. 74
type: MusicAlbum
date published: 2024-01-19

Haydn: Sonatas in D, E, F Major
type: MusicAlbum
date published: 2023-09-08

Hlobil: Quartet for Harpsichord, Violin, Viola and Cello, Op. 23 - Kapr: String Quartet for 2 Violin, Viola and Cello No. 3
type: MusicAlbum
date published: 2023-08-31

Zuzana Růžičková hraje Bacha, Rychlíka a Kalabise
type: MusicAlbum
date published: 2018-06-26

Bach: Cello Sonatas
type: MusicAlbum
date published: 2018-01-02

Zuzana Růžičková Plays Bach, Rychlík and Kalabis
type: MusicAlbum
date published: 2017-12-01

J. S. Bach: The Well-Tempered Clavier, Book II BWV 870-893
type: MusicAlbum
date published: 2017-09-27

J. S. Bach: The Well-Tempered Clavier, Book I BWV 846-869
type: MusicAlbum
date published: 2017-09-25

Bach: Goldberg´s Variations
type: MusicAlbum
date published: 2017-03-28

Englische Virginalisten
type: MusicAlbum
date published: 2016-01-01

D. Scarlatti: Harpsichord Sonatas
type: MusicAlbum
date published: 2016-01-01

J. S. Bach: Dobře temperovaný klavír II (BWV 870-893)
type: MusicAlbum
date published: 2016

J. S. Bach: Dobře temperovaný klavír I (BWV 846-869)
type: MusicAlbum
date published: 2016

Cembalo, Musik aus alten Schweizer Tabulaturen
type: MusicAlbum
date published: 2015-01-09

Harpsichord Music from England, Spain and Portugal
type: MusicAlbum
date published: 2012-06-15

Bach, Böhm, Lübeck, Scheidt, Pachelbel, Sweelinck and Buxtehude: Harpsichord Works
type: MusicAlbum
date published: 2011-10-13

Martinů: Concertos for Oboe, Harpsichord and Piano No. 3
type: MusicAlbum
date published: 2002-07-29
track: Concerto for Oboe and Small Orchestra, H. 353: I. Moderato
  type: MusicRecording
  duration: PT5M21S
  duration ms: 321666
  explicit: false
  by artist: Bohuslav Martinů
  by artist: Czech Philharmonic
  by artist: Václav Neumann
  by artist: Ivan Sequardt
  in album: Martinů: Concertos for Oboe, Harpsichord and Piano No. 3
    type: MusicAlbum
    date published: 2002-07-29
  isrc code: CZA169501255
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-31T19:30:14+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x6c0b702ce331e93817e4048d97cb4b76b1fa40ea750982bde762e8bb5143916f
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960455
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960455
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA169501255
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-31T19:53:13Z
  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 0x6c0b702ce331e93817e4048d97cb4b76b1fa40ea750982bde762e8bb5143916f. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA169501255 — a six-check JSON result.
    date published: 2026-07-31T19:53:13Z
  audio: Concerto for Oboe and Small Orchestra, H. 353: I. Moderato
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 100.563
    additional property: Musical Key
      type: PropertyValue
      value: 10
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.268
    additional property: Energy
      type: PropertyValue
      value: 0.166
    additional property: Speechiness
      type: PropertyValue
      value: 0.038
    additional property: Acousticness
      type: PropertyValue
      value: 0.978
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.888
    additional property: Liveness
      type: PropertyValue
      value: 0.27
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.077
    additional property: Loudness (dB)
      type: PropertyValue
      value: -20.402
    additional property: Key Name
      type: PropertyValue
      value: Bb
    additional property: Mode Name
      type: PropertyValue
      value: Major

Hans Krása: Complete Chamber Music
type: MusicAlbum
date published: 1997-09-01

Scarlatti: Harpsichord Sonatas
type: MusicAlbum
date published: 1997-01-01

Johann Sebastian Bach: Sonatas BWV 1020, 1022, 1027-1029
type: MusicAlbum
date published: 1996-01-01

Bach: The Well-Tempered Clavier
type: MusicAlbum
date published: 1995-01-01

Bach: Harpsichord Works
type: MusicAlbum
date published: 1994-01-01

Bach: Konzerte nach verschiedenen Meistern
type: MusicAlbum
date published: 1992-01-01

Mozart: Violin Sonatas Nos. 2, 4, 6, 8, 10, 15 & 16
type: MusicAlbum
date published: 1991-01-01
track: Violin Sonata No. 2 in D Major, Op. 1 No. 2, K. 7: I. Allegro molto
  type: MusicRecording
  duration: PT3M25S
  duration ms: 205933
  explicit: false
  by artist: Wolfgang Amadeus Mozart
  by artist: Josef Suk
  by artist: Zuzana Růžičková
  in album: Mozart: Violin Sonatas Nos. 2, 4, 6, 8, 10, 15 & 16
    type: MusicAlbum
    date published: 1991-01-01
  genre: classical
  genre: classical-era
  genre: classical-piano
  genre: opera
  genre: chamber-music
  genre: concerto
  isrc code: CZA169101124
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-30T14:47:56+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x1964b3bdd49c89b02575b12f249a8f39ba5402e3f0f65172c189cea73726951f
  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/CZA169101124
  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 0x1964b3bdd49c89b02575b12f249a8f39ba5402e3f0f65172c189cea73726951f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA169101124 — a six-check JSON result.
    date published: 2026-07-30T15:42:38Z
  audio: Violin Sonata No. 2 in D Major, Op. 1 No. 2, K. 7: I. Allegro molto
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 145.469
    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: 0.352
    additional property: Energy
      type: PropertyValue
      value: 0.212
    additional property: Speechiness
      type: PropertyValue
      value: 0.034
    additional property: Acousticness
      type: PropertyValue
      value: 0.819
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.085
    additional property: Liveness
      type: PropertyValue
      value: 0.252
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.597
    additional property: Loudness (dB)
      type: PropertyValue
      value: -21.806
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Violin Sonata No. 2 in D Major, Op. 1 No. 2, K. 7: II. Adagio
  type: MusicRecording
  duration: PT4M17S
  duration ms: 257399
  explicit: false
  by artist: Wolfgang Amadeus Mozart
  by artist: Josef Suk
  by artist: Zuzana Růžičková
  in album: Mozart: Violin Sonatas Nos. 2, 4, 6, 8, 10, 15 & 16
    type: MusicAlbum
    date published: 1991-01-01
  genre: classical
  genre: classical-era
  genre: classical-piano
  genre: opera
  genre: chamber-music
  genre: concerto
  isrc code: CZA169102124
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-07T11:06:50+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x936c9e79b5c14607be02690308fab0dfc1c9c2237499758ae8994701f62ccb17
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957120
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957120
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA169102124
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T03:22:41Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0x936c9e79b5c14607be02690308fab0dfc1c9c2237499758ae8994701f62ccb17. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA169102124 — a six-check JSON result.
    date published: 2026-07-08T03:22:41Z
  audio: Violin Sonata No. 2 in D Major, Op. 1 No. 2, K. 7: II. Adagio
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 120.332
    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: 0.368
    additional property: Energy
      type: PropertyValue
      value: 0.06
    additional property: Speechiness
      type: PropertyValue
      value: 0.04
    additional property: Acousticness
      type: PropertyValue
      value: 0.852
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.002
    additional property: Liveness
      type: PropertyValue
      value: 0.074
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.331
    additional property: Loudness (dB)
      type: PropertyValue
      value: -26.138
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Violin Sonata No. 2 in D Major, Op. 1 No. 2, K. 7: III. Menuetto
  type: MusicRecording
  duration: PT2M51S
  duration ms: 171333
  explicit: false
  by artist: Wolfgang Amadeus Mozart
  by artist: Josef Suk
  by artist: Zuzana Růžičková
  in album: Mozart: Violin Sonatas Nos. 2, 4, 6, 8, 10, 15 & 16
    type: MusicAlbum
    date published: 1991-01-01
  genre: classical
  genre: classical-era
  genre: classical-piano
  genre: opera
  genre: chamber-music
  genre: concerto
  isrc code: CZA169103124
  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: Violin Sonata No. 2 in D Major, Op. 1 No. 2, K. 7: III. Menuetto

CopyrightID
type: PropertyValue

CopyrightStatus
type: PropertyValue
value: registered

CopyrightRegisteredAt
type: PropertyValue
value: 2026-07-31T19:17:39+00:00

CopyrightChainExplorerURL
type: PropertyValue
value: https://explorer.copyrightchains.com/tx/0x22d4f2ee413c21c3b9bc8ec2cc77cf7286c89eacbcd45fcf6729524346590f9e

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 960455

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/960455

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA169103124

OTSTimestamp
type: PropertyValue
value: 2026-07-31T19:53:13Z

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 0x22d4f2ee413c21c3b9bc8ec2cc77cf7286c89eacbcd45fcf6729524346590f9e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA169103124 — a six-check JSON result.
date published: 2026-07-31T19:53:13Z

Violin Sonata No. 2 in D Major, Op. 1 No. 2, K. 7: III. Menuetto
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 145.895
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: 0.442
additional property: Energy
  type: PropertyValue
  value: 0.137
additional property: Speechiness
  type: PropertyValue
  value: 0.045
additional property: Acousticness
  type: PropertyValue
  value: 0.886
additional property: Instrumentalness
  type: PropertyValue
  value: 0.001
additional property: Liveness
  type: PropertyValue
  value: 0.112
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.77
additional property: Loudness (dB)
  type: PropertyValue
  value: -24.209
additional property: Key Name
  type: PropertyValue
  value: D
additional property: Mode Name
  type: PropertyValue
  value: Major

Bach: Harpsichord Concertos
type: MusicAlbum
date published: 1988-01-01
track: Harpsichord Concerto No. 1 in D Minor, BWV 1052: I. Allegro
  type: MusicRecording
  duration: PT9M13S
  duration ms: 553960
  explicit: false
  by artist: Johann Sebastian Bach
  by artist: Prague Chamber Soloists
  by artist: Václav Neumann
  by artist: Zuzana Růžičková
  in album: Bach: Harpsichord Concertos
    type: MusicAlbum
    date published: 1988-01-01
  genre: classical
  genre: classical-piano
  genre: early-music
  genre: baroque
  genre: chamber-music
  genre: concerto
  isrc code: CZA166901407
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-31T11:43:11+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x6cf10697b5144096882246ae2b7f56398b64e7e1376146ed828a6e419b745120
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960397
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960397
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA166901407
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-31T12:24:41Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0x6cf10697b5144096882246ae2b7f56398b64e7e1376146ed828a6e419b745120. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA166901407 — a six-check JSON result.
    date published: 2026-07-31T12:24:41Z
  audio: Harpsichord Concerto No. 1 in D Minor, BWV 1052: I. Allegro
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 107.887
    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: 0.476
    additional property: Energy
      type: PropertyValue
      value: 0.321
    additional property: Speechiness
      type: PropertyValue
      value: 0.032
    additional property: Acousticness
      type: PropertyValue
      value: 0.677
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.056
    additional property: Liveness
      type: PropertyValue
      value: 0.194
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.519
    additional property: Loudness (dB)
      type: PropertyValue
      value: -19.535
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Czech Baroque Harpsichord Works
type: MusicAlbum
date published: 1983

Händel: Harpsichord Works
type: MusicAlbum
date published: 1979

Bach: Concertos for Three and Four Harpsichords and Strings
type: MusicAlbum
date published: 1977-01-01

Bach: The Complete Keyboard Works
type: MusicAlbum
date published: 1975
track: Bach, JS: The Well-Tempered Clavier, Book I, Prelude and Fugue No. 1 in C Major, BWV 846: Prelude
  type: MusicRecording
  duration: PT2M8S
  duration ms: 128199
  explicit: false
  by artist: Johann Sebastian Bach
  by artist: Zuzana Růžičková
  in album: Bach: The Complete Keyboard Works
    type: MusicAlbum
    date published: 1975
  genre: classical
  genre: classical-piano
  genre: early-music
  genre: baroque
  genre: chamber-music
  genre: concerto
  isrc code: FRZ201600070
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-07T18:15:01+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x0360c44b9c5dbf62dde8f88c796949500e3166e167901de9cdcba15cc0bda0e9
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957120
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957120
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ201600070
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T03:22:41Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0x0360c44b9c5dbf62dde8f88c796949500e3166e167901de9cdcba15cc0bda0e9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ201600070 — a six-check JSON result.
    date published: 2026-07-08T03:22:41Z
  audio: Bach, JS: The Well-Tempered Clavier, Book I, Prelude and Fugue No. 1 in C Major, BWV 846: Prelude
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 148.109
    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
      value: 0.135
    additional property: Energy
      type: PropertyValue
      value: 0.306
    additional property: Speechiness
      type: PropertyValue
      value: 0.045
    additional property: Acousticness
      type: PropertyValue
      value: 0.708
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.012
    additional property: Liveness
      type: PropertyValue
      value: 0.049
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.518
    additional property: Loudness (dB)
      type: PropertyValue
      value: -28.346
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major

Bach: 2 Konzerte für 3 Cembali und Streichorchester
type: MusicAlbum
date published: 1967-01-01

Poulenc, martinů: harpsichord concertos
type: MusicAlbum
date published: 1967
track: Harpsichord Concerto: I. Allegro molto. Adagio. Allegro molto
  type: MusicRecording
  duration: PT11M4S
  duration ms: 664266
  explicit: false
  by artist: Francis Poulenc
  by artist: Czech Philharmonic
  by artist: Kurt Sanderling
  by artist: Zuzana Růžičková
  in album: Poulenc, martinů: harpsichord concertos
    type: MusicAlbum
    date published: 1967
  genre: classical
  genre: early-modern-classical
  genre: neoclassicism
  isrc code: CZA166701303
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-07T13:32:39+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xe0ba03b3432de8932a6bc67ce57d061486d83693ee5601fe2cc953ed611edd74
  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/CZA166701303
  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 0xe0ba03b3432de8932a6bc67ce57d061486d83693ee5601fe2cc953ed611edd74. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA166701303 — a six-check JSON result.
    date published: 2026-07-08T03:20:19Z
  audio: Harpsichord Concerto: I. Allegro molto. Adagio. Allegro molto
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 141.756
    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: 0.449
    additional property: Energy
      type: PropertyValue
      value: 0.306
    additional property: Speechiness
      type: PropertyValue
      value: 0.056
    additional property: Acousticness
      type: PropertyValue
      value: 0.737
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.533
    additional property: Liveness
      type: PropertyValue
      value: 0.108
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.075
    additional property: Loudness (dB)
      type: PropertyValue
      value: -16.725
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Major

Harpsichord Music in 16th - 18th Century. Couperin: Pieces de clavecin
type: MusicAlbum
date published: 1967

Harpsichord Music in 16th - 18th Century. Scarlatti: Pieces de clavecin
type: MusicAlbum
date published: 1965

Bach: Harpsichord Concertos (BWV 1052 & BWV 1053)
type: MusicAlbum
date published: 1964

Harpsichord Works (Byrd, Couperin, Daquin, Purcell, Rameau)
type: MusicAlbum
date published: 1954