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type: MusicGroup
popularity: 16
followers: 168
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x82f06148593c927b67e2bbbfd13064740c1a1c2c7b4afc14c5408c5a94e110b8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953808
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953808
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/eeb6edc7-1901-406e-aa30-a99be813ecf6.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/eeb6edc7-1901-406e-aa30-a99be813ecf6.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/eeb6edc7-1901-406e-aa30-a99be813ecf6
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T16:45:15Z
additional property: OTSCanonicalRecord
  type: PropertyValue
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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 0x82f06148593c927b67e2bbbfd13064740c1a1c2c7b4afc14c5408c5a94e110b8. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eeb6edc7-1901-406e-aa30-a99be813ecf6.json and https://artists.proofprofile.net/proofs/artist/eeb6edc7-1901-406e-aa30-a99be813ecf6.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-15T16:45:15Z
  text: {"copyright_id":"0x82f06148593c927b67e2bbbfd13064740c1a1c2c7b4afc14c5408c5a94e110b8","name":"Martin Zeller","registered_at":"2026-06-15T05:35:58Z","symbol":"NIM0698223","token_address":"0xf039dc9375167f1d0b42a2d63c38d0965be1d31d","type":"artist","uuid":"eeb6edc7-1901-406e-aa30-a99be813ecf6"}
album: Purcell: Fantazias
  type: MusicAlbum
  date published: 2023-09-22
  track: Fantasia for 4 Viols in E Minor, Z. 741
    type: MusicRecording
    duration: PT3M31S
    duration ms: 211040
    explicit: false
    by artist: Henry Purcell
    by artist: John Holloway
    by artist: Monika Baer
    by artist: Renate Steinmann
    by artist: Martin Zeller
    in album: Purcell: Fantazias
      type: MusicAlbum
      date published: 2023-09-22
    genre: classical
    genre: choral
    isrc code: DEB331524901
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-06-10T18:58:13+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xf48d0182f11bae5255c90a0fc0100071310582884c5a8e9a1f0b6287c4383c1a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 953520
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/953520
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331524901
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-06-13T13:32:09Z
    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 0xf48d0182f11bae5255c90a0fc0100071310582884c5a8e9a1f0b6287c4383c1a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331524901 — a six-check JSON result.
      date published: 2026-06-13T13:32:09Z
    audio: Fantasia for 4 Viols in E Minor, Z. 741
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 115.516
      additional property: Musical Key
        type: PropertyValue
        value: 3
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 5
      additional property: Danceability
        type: PropertyValue
        value: 0.16
      additional property: Energy
        type: PropertyValue
        value: 0.166
      additional property: Speechiness
        type: PropertyValue
        value: 0.041
      additional property: Acousticness
        type: PropertyValue
        value: 0.947
      additional property: Instrumentalness
        type: PropertyValue
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      additional property: Liveness
        type: PropertyValue
        value: 0.082
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.091
      additional property: Loudness (dB)
        type: PropertyValue
        value: -20.514
      additional property: Key Name
        type: PropertyValue
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      additional property: Mode Name
        type: PropertyValue
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  track: Fantasia for 3 Viols in D Minor, Z. 732
    type: MusicRecording
    duration: PT2M43S
    duration ms: 163160
    explicit: false
    by artist: Henry Purcell
    by artist: John Holloway
    by artist: Monika Baer
    by artist: Martin Zeller
    in album: Purcell: Fantazias
      type: MusicAlbum
      date published: 2023-09-22
    genre: classical
    genre: choral
    isrc code: DEB331524902
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-30T01:28:45+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x26a3641111b3e99844a401cde2e2c8296fa1e68d7dfa0e2343510134ac284586
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 960187
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/960187
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331524902
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-30T01:34:28Z
    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 0x26a3641111b3e99844a401cde2e2c8296fa1e68d7dfa0e2343510134ac284586. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/DEB331524902 — a six-check JSON result.
      date published: 2026-07-30T01:34:28Z
    audio: Fantasia for 3 Viols in D Minor, Z. 732
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 159.985
      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: 0.199
      additional property: Energy
        type: PropertyValue
        value: 0.125
      additional property: Speechiness
        type: PropertyValue
        value: 0.04
      additional property: Acousticness
        type: PropertyValue
        value: 0.953
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
  track: Fantasia for 4 Viols in G Minor, Z. 735
  track: Fantasia for 4 Viols in B-Flat Major, Z. 736
  track: Fantasia for 4 Viols in F Major, Z. 737
  track: Fantasia for 3 Viols in F Major, Z. 733
  track: Fantasia for 4 Viols in C Minor, Z. 738
  track: Fantasia for 4 Viols in D Minor, Z. 739
  track: Fantasia for 3 Viols in G Minor, Z. 734
  track: Fantasia for 4 Viols in G Major, Z. 742
  track: Fantasia for 4 Viols in D Minor, Z. 743
album: Arpeggione - A Forgotten Instrument
album: Dialogues
album: Manoel Dias de Oliveira: Sacred Music from 18th Century Brasil, Vol. II
album: PROSPERO Catalogue 2024 - Our Listening Tips II: Various Composers
album: Marcello: Estro Poetico-Armonico (Salmi 14, 21, 27, 38 - Sonata a tré, viola di gamba, violoncello e basso continuo)
album: Maurice Steger : A Portrait
album: Cervetto: 6 Sonatas for 3 Violoncellos
album: Schubert: Schwanengesang, D. 957: No. 9, Ihr Bild (Arr. for Arpeggione by Martin Zeller)
album: Spohr: Faust: Polacca (Arr. for Arpeggione and Guitar by Vincenz Schuster)
album: Schubert: Arpeggione Sonata in A Minor, D. 821
album: Schubert: Schwanengesang, D. 957: No 4, Ständchen (Arr. for Arpeggione, Guitar and Fortepiano by Martin Zeller)
album: Romberg: Cello Concerto No. 2 in A Major, Op. 3: II. Adagio (Arr. for Arpeggione and Guitar by Vincenz Schuster)
album: Schubert: Violin Sonata No. 3 in G Minor, Op. 137 No.3 (Arr. for Arpeggione by Martin Zeller)
album: Schubert: Violin Sonata No. 1 in D Major, Op. posth. 137/1, D.384 (Arr. for Arpeggione by Martin Zeller)
album: Passion
album: Pavans and Fantasies from the Age of Dowland
album: Sami sobě stínem
album: Purcell: Fantazia IV, Z. 735
album: Purcell: Fantazia VI, Z. 737
track: Sonata for Violoncello and Basso continuo, RV 42: I. Preludio. Largo
track: Sonata for Violoncello and Basso continuo, RV 42: III. Sarabanda. Largo

Instrumentalness
type: PropertyValue
value: 0.697

Liveness
type: PropertyValue
value: 0.097

Valence (Positivity)
type: PropertyValue
value: 0.26

Loudness (dB)
type: PropertyValue
value: -22.08

Key Name
type: PropertyValue
value: C#

Mode Name
type: PropertyValue
value: Minor

Fantasia for 4 Viols in G Minor, Z. 735
type: MusicRecording
duration: PT3M26S
duration ms: 206000
explicit: false
by artist: Henry Purcell
by artist: John Holloway
by artist: Monika Baer
by artist: Renate Steinmann
by artist: Martin Zeller
in album: Purcell: Fantazias
  type: MusicAlbum
  date published: 2023-09-22
genre: classical
genre: choral
isrc code: DEB331524903
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-30T23:04:59+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc22806b6dde76f6cc9bb584b3ed5f7ed75079fda65b0bd8579e858c811f7c4b4
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960327
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331524903
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T00:26:26Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22806b6dde76f6cc9bb584b3ed5f7ed75079fda65b0bd8579e858c811f7c4b4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331524903 — a six-check JSON result.
  date published: 2026-07-31T00:26:26Z
audio: Fantasia for 4 Viols in G Minor, Z. 735
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 96.355
  additional property: Musical Key
    type: PropertyValue
    value: 6
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.098
  additional property: Energy
    type: PropertyValue
    value: 0.163
  additional property: Speechiness
    type: PropertyValue
    value: 0.042
  additional property: Acousticness
    type: PropertyValue
    value: 0.959
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.792
  additional property: Liveness
    type: PropertyValue
    value: 0.126
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.145
  additional property: Loudness (dB)
    type: PropertyValue
    value: -20.134
  additional property: Key Name
    type: PropertyValue
    value: F#
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Fantasia for 4 Viols in B-Flat Major, Z. 736
type: MusicRecording
duration: PT4M9S
duration ms: 249000
explicit: false
by artist: Henry Purcell
by artist: John Holloway
by artist: Monika Baer
by artist: Renate Steinmann
by artist: Martin Zeller
in album: Purcell: Fantazias
  type: MusicAlbum
  date published: 2023-09-22
genre: classical
genre: choral
isrc code: DEB331524904
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-30T00:46:51+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf57f5b1ee0f8a03f92e2fa810f96725e39a91bc9ba565d7b3fb9056261d57ba9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960183
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960183
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331524904
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T01:10:20Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0xf57f5b1ee0f8a03f92e2fa810f96725e39a91bc9ba565d7b3fb9056261d57ba9. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331524904 — a six-check JSON result.
  date published: 2026-07-30T01:10:20Z
audio: Fantasia for 4 Viols in B-Flat Major, Z. 736
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
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  additional property: Musical Key
    type: PropertyValue
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.186
  additional property: Energy
    type: PropertyValue
    value: 0.179
  additional property: Speechiness
    type: PropertyValue
    value: 0.038
  additional property: Acousticness
    type: PropertyValue
    value: 0.963
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.889
  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.09
  additional property: Loudness (dB)
    type: PropertyValue
    value: -20.332
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Major

Fantasia for 4 Viols in F Major, Z. 737
type: MusicRecording
duration: PT3M34S
duration ms: 214000
explicit: false
by artist: Henry Purcell
by artist: John Holloway
by artist: Monika Baer
by artist: Renate Steinmann
by artist: Martin Zeller
in album: Purcell: Fantazias
  type: MusicAlbum
  date published: 2023-09-22
genre: classical
genre: choral
isrc code: DEB331524905
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T05:06:25+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x58dec2ccbd08ec024b424357c3c05394b6ab7f3d95de000b2b4222d4594fa641
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/DEB331524905
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 0x58dec2ccbd08ec024b424357c3c05394b6ab7f3d95de000b2b4222d4594fa641. 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/DEB331524905 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
audio: Fantasia for 4 Viols in F Major, Z. 737
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 102.293
  additional property: Musical Key
    type: PropertyValue
    value: 4
  additional property: Mode (Major/Minor)
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    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
    type: PropertyValue
    value: 0.141
  additional property: Speechiness
    type: PropertyValue
    value: 0.037
  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
    type: PropertyValue
    value: 0.818
  additional property: Liveness
    type: PropertyValue
    value: 0.082
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.114
  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
    type: PropertyValue
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  additional property: Mode Name
    type: PropertyValue
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Fantasia for 3 Viols in F Major, Z. 733
type: MusicRecording
duration: PT3M14S
duration ms: 194000
explicit: false
by artist: Henry Purcell
by artist: John Holloway
by artist: Monika Baer
by artist: Martin Zeller
in album: Purcell: Fantazias
  type: MusicAlbum
  date published: 2023-09-22
genre: classical
genre: choral
isrc code: DEB331524906
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-30T15:45:55+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7350c0f11a843b616c240477fcda459b543cf19d86219fd1168eabc8fe93bbe0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960276
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960276
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331524906
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T16:01:17Z
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 0x7350c0f11a843b616c240477fcda459b543cf19d86219fd1168eabc8fe93bbe0. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/DEB331524906 — a six-check JSON result.
  date published: 2026-07-30T16:01:17Z
audio: Fantasia for 3 Viols in F Major, Z. 733
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 127.302
  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: 0.184
  additional property: Energy
    type: PropertyValue
    value: 0.134
  additional property: Speechiness
    type: PropertyValue
    value: 0.041
  additional property: Acousticness
    type: PropertyValue
    value: 0.964
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.883
  additional property: Liveness
    type: PropertyValue
    value: 0.245
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.089
  additional property: Loudness (dB)
    type: PropertyValue
    value: -22.289
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Major

Fantasia for 4 Viols in C Minor, Z. 738
type: MusicRecording
duration: PT4M19S
duration ms: 259000
explicit: false
by artist: Henry Purcell
by artist: John Holloway
by artist: Monika Baer
by artist: Renate Steinmann
by artist: Martin Zeller
in album: Purcell: Fantazias
  type: MusicAlbum
  date published: 2023-09-22
genre: classical
genre: choral
isrc code: DEB331524907
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-30T21:09:28+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb97cd40e8167936ad84bed2e3aea714f4204d33e6a3d90ca422a77d291097290
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960317
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960317
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331524907
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T21:35:24Z
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 0xb97cd40e8167936ad84bed2e3aea714f4204d33e6a3d90ca422a77d291097290. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEB331524907 — a six-check JSON result.
  date published: 2026-07-30T21:35:24Z
audio: Fantasia for 4 Viols in C Minor, Z. 738
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 112.752
  additional property: Musical Key
    type: PropertyValue
    value: 11
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.118
  additional property: Energy
    type: PropertyValue
    value: 0.116
  additional property: Speechiness
    type: PropertyValue
    value: 0.042
  additional property: Acousticness
    type: PropertyValue
    value: 0.947
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.924
  additional property: Liveness
    type: PropertyValue
    value: 0.098
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.077
  additional property: Loudness (dB)
    type: PropertyValue
    value: -21.619
  additional property: Key Name
    type: PropertyValue
    value: B
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Fantasia for 4 Viols in D Minor, Z. 739
type: MusicRecording
duration: PT3M19S
duration ms: 199000
explicit: false
by artist: Henry Purcell
by artist: John Holloway
by artist: Monika Baer
by artist: Renate Steinmann
by artist: Martin Zeller
in album: Purcell: Fantazias
  type: MusicAlbum
  date published: 2023-09-22
genre: classical
genre: choral
isrc code: DEB331524908
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-30T20:52:37+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4a68aa7d33836b8f658a51d70819fb42c2f2267c2c70722525fe9dbf934cbdab
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960314
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960314
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331524908
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T21:00:46Z
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 0x4a68aa7d33836b8f658a51d70819fb42c2f2267c2c70722525fe9dbf934cbdab. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/DEB331524908 — a six-check JSON result.
  date published: 2026-07-30T21:00:46Z
audio: Fantasia for 4 Viols in D Minor, Z. 739
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 139.249
  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: 0.166
  additional property: Energy
    type: PropertyValue
    value: 0.134
  additional property: Speechiness
    type: PropertyValue
    value: 0.036
  additional property: Acousticness
    type: PropertyValue
    value: 0.966
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.868
  additional property: Liveness
    type: PropertyValue
    value: 0.087
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.075
  additional property: Loudness (dB)
    type: PropertyValue
    value: -20.536
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Fantasia for 3 Viols in G Minor, Z. 734
type: MusicRecording
duration: PT2M28S
duration ms: 148933
explicit: false
by artist: Henry Purcell
by artist: John Holloway
by artist: Monika Baer
by artist: Martin Zeller
in album: Purcell: Fantazias
  type: MusicAlbum
  date published: 2023-09-22
genre: classical
genre: choral
isrc code: DEB331524910
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T12:26:21+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9616cf04d172b7b42bb9787377aca57aea1ada57d915a4a5bca9a256f99ea9d5
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960403
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960403
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331524910
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T13:04:34Z
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 0x9616cf04d172b7b42bb9787377aca57aea1ada57d915a4a5bca9a256f99ea9d5. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331524910 — a six-check JSON result.
  date published: 2026-07-31T13:04:34Z
audio: Fantasia for 3 Viols in G Minor, Z. 734
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 99.615
  additional property: Musical Key
    type: PropertyValue
    value: 1
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.258
  additional property: Energy
    type: PropertyValue
    value: 0.107
  additional property: Speechiness
    type: PropertyValue
    value: 0.036
  additional property: Acousticness
    type: PropertyValue
    value: 0.969
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.874
  additional property: Liveness
    type: PropertyValue
    value: 0.091
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.206
  additional property: Loudness (dB)
    type: PropertyValue
    value: -21.73
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Fantasia for 4 Viols in G Major, Z. 742
type: MusicRecording
duration: PT3M10S
duration ms: 190066
explicit: false
by artist: Henry Purcell
by artist: John Holloway
by artist: Monika Baer
by artist: Renate Steinmann
by artist: Martin Zeller
in album: Purcell: Fantazias
  type: MusicAlbum
  date published: 2023-09-22
genre: classical
genre: choral
isrc code: DEB331524911
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T19:29:05+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe8b608c56e155a7c63e0c79185b3831d9bdade01d283189785831f9f74e5862d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957122
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957122
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331524911
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:39:04Z
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 0xe8b608c56e155a7c63e0c79185b3831d9bdade01d283189785831f9f74e5862d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEB331524911 — a six-check JSON result.
  date published: 2026-07-08T03:39:04Z
audio: Fantasia for 4 Viols in G Major, Z. 742
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 100.956
  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: 0.09
  additional property: Energy
    type: PropertyValue
    value: 0.204
  additional property: Speechiness
    type: PropertyValue
    value: 0.047
  additional property: Acousticness
    type: PropertyValue
    value: 0.954
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.769
  additional property: Liveness
    type: PropertyValue
    value: 0.11
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.115
  additional property: Loudness (dB)
    type: PropertyValue
    value: -19.481
  additional property: Key Name
    type: PropertyValue
    value: F#
  additional property: Mode Name
    type: PropertyValue
    value: Major

Fantasia for 4 Viols in D Minor, Z. 743
type: MusicRecording
duration: PT3M29S
duration ms: 209013
explicit: false
by artist: Henry Purcell
by artist: John Holloway
by artist: Monika Baer
by artist: Renate Steinmann
by artist: Martin Zeller
in album: Purcell: Fantazias
  type: MusicAlbum
  date published: 2023-09-22
genre: classical
genre: choral
isrc code: DEB331524912
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T00:48:57+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc63746875165f2d49e97315d8c9a3937f122c771b684da04ab51d5667f1be865
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960334
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960334
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331524912
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T02:19:15Z
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 0xc63746875165f2d49e97315d8c9a3937f122c771b684da04ab51d5667f1be865. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEB331524912 — a six-check JSON result.
  date published: 2026-07-31T02:19:15Z
audio: Fantasia for 4 Viols in D Minor, Z. 743
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 92.078
  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: 0.17
  additional property: Energy
    type: PropertyValue
    value: 0.12
  additional property: Speechiness
    type: PropertyValue
    value: 0.038
  additional property: Acousticness
    type: PropertyValue
    value: 0.979
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.81
  additional property: Liveness
    type: PropertyValue
    value: 0.081
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.079
  additional property: Loudness (dB)
    type: PropertyValue
    value: -23.194
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Arpeggione - A Forgotten Instrument
type: MusicAlbum
date published: 2024-07-05
track: Arpeggione Sonata in A Minor, D. 821: I. Allegro moderato
  type: MusicRecording
  duration: PT12M42S
  duration ms: 762733
  explicit: false
  by artist: Franz Schubert
  by artist: Martin Zeller
  by artist: Giorgio Paronuzzi
  in album: Arpeggione - A Forgotten Instrument
    type: MusicAlbum
    date published: 2024-07-05
  genre: classical
  genre: classical-piano
  genre: chamber-music
  isrc code: CHE272402667
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-31T07:38:32+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x99dfe34ea716619aede22f986d1d3439378436787bb36e3e66e8afb5ca961aaf
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960368
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960368
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHE272402667
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-31T08:26:41Z
  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 0x99dfe34ea716619aede22f986d1d3439378436787bb36e3e66e8afb5ca961aaf. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CHE272402667 — a six-check JSON result.
    date published: 2026-07-31T08:26:41Z
  audio: Arpeggione Sonata in A Minor, D. 821: I. Allegro moderato
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 126.182
    additional property: Musical Key
      type: PropertyValue
      value: 9
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-31T18:48:12Z
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Dialogues
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Manoel Dias de Oliveira: Sacred Music from 18th Century Brasil, Vol. II
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  by artist: Dona Luciana
  by artist: Peter Mächler
  by artist: Lorenz Raths
  by artist: Stefano Mariani
  by artist: Dona Silvia
  by artist: Rogério Gonçalves
  by artist: Hubert Saladin
  by artist: Maja Hünninger
  by artist: Mathias Weibel
  by artist: Liane Ehlich
  by artist: Claire-Anne Piguet
  by artist: Armin Bereuter
  by artist: Dona Elma
  by artist: Dona Angelika
  by artist: Luiz Alves Da Silva
  by artist: Dona Carmen
  by artist: Martin Zeller
  by artist: Beat Mattmüller
  by artist: Dona Valéria
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  subject of: OpenTimestamps Proof of Existence
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  by artist: Maja Hünninger
  by artist: Stefano Mariani
  by artist: Lorenz Raths
  by artist: Dona Angelika
  by artist: Claire-Anne Piguet
  by artist: Rogério Gonçalves
  by artist: Mathias Weibel
  by artist: Armin Bereuter
  by artist: Martin Zeller
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    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-31T22:27:44Z
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track: Te Deum laudamus: V. Te Prophetarum - Te Martirum
track: Encomendação das Almas: III. Senhor Deus
track: Tantum Ergo
track: Pange Lingua
track: Magnificat: Magnificat
track: Magnificat: Gloria - Amen
track: Te Deum Laudamus: I. Te Deum

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Te Deum laudamus: V. Te Prophetarum - Te Martirum
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by artist: Lorenz Raths
by artist: Dona Angelika
by artist: Dona Marília
by artist: Peter Mächler
by artist: Dona Luciana
by artist: Claire-Anne Piguet
by artist: Dona Carmen
by artist: Stefano Mariani
by artist: Liane Ehlich
by artist: Dona Elma
by artist: Manoel Dias de Oliveira
by artist: Martin Zeller
by artist: Rogério Gonçalves
by artist: David Acklin
by artist: Beat Mattmüller
by artist: Maja Hünninger
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subject of: OpenTimestamps Proof of Existence
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Encomendação das Almas: III. Senhor Deus
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by artist: Dona Silvia
by artist: Stefano Mariani
by artist: Dona Valéria
by artist: Liane Ehlich
by artist: Maja Hünninger
by artist: David Acklin
by artist: Dona Marília
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by artist: Claire-Anne Piguet
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subject of: OpenTimestamps Proof of Existence
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Tantum Ergo
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by artist: Claire-Anne Piguet
by artist: Rogério Gonçalves
by artist: Dona Carmen
by artist: Stefano Mariani
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T22:27:44Z
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Pange Lingua
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duration ms: 118640
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by artist: Manoel Dias de Oliveira
by artist: Dona Elma
by artist: David Acklin
by artist: Beat Mattmüller
by artist: Armin Bereuter
by artist: Martin Zeller
by artist: Rogério Gonçalves
by artist: Hubert Saladin
by artist: Dona Valéria
by artist: Dona Carmen
by artist: Dona Silvia
by artist: Mathias Weibel
by artist: Liane Ehlich
by artist: Maja Hünninger
by artist: Dona Luciana
by artist: Dona Marília
by artist: Lorenz Raths
by artist: Peter Mächler
by artist: Luiz Alves Da Silva
by artist: Dona Angelika
by artist: Stefano Mariani
by artist: Claire-Anne Piguet
in album: Manoel Dias de Oliveira: Sacred Music from 18th Century Brasil, Vol. II
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genre: gregorian-chant
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additional property: OTSVerifyInstructions
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  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T09:25:34Z
audio: Pange Lingua
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Magnificat: Magnificat
type: MusicRecording
duration: PT3M47S
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by artist: Peter Mächler
by artist: Armin Bereuter
by artist: Claire-Anne Piguet
by artist: Stefano Mariani
by artist: Dona Elma
by artist: Hubert Saladin
by artist: Dona Valéria
by artist: Dona Carmen
by artist: Dona Angelika
by artist: Maja Hünninger
by artist: Dona Luciana
by artist: Dona Silvia
by artist: Rogério Gonçalves
by artist: Liane Ehlich
by artist: Martin Zeller
by artist: David Acklin
by artist: Luiz Alves Da Silva
by artist: Mathias Weibel
by artist: Lorenz Raths
by artist: Dona Marília
by artist: Manoel Dias de Oliveira
by artist: Beat Mattmüller
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additional property: OTSVerifyInstructions
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  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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Magnificat: Gloria - Amen
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duration: PT1M57S
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by artist: Dona Angelika
by artist: Stefano Mariani
by artist: Peter Mächler
by artist: Luiz Alves Da Silva
by artist: Hubert Saladin
by artist: Manoel Dias de Oliveira
by artist: Dona Carmen
by artist: Liane Ehlich
by artist: Dona Elma
by artist: Rogério Gonçalves
by artist: Dona Silvia
by artist: Maja Hünninger
by artist: Claire-Anne Piguet
by artist: Armin Bereuter
by artist: David Acklin
by artist: Mathias Weibel
by artist: Dona Valéria
by artist: Beat Mattmüller
by artist: Lorenz Raths
by artist: Martin Zeller
by artist: Dona Marília
by artist: Dona Luciana
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-08-01T00:10:46Z
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Te Deum Laudamus: I. Te Deum
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by artist: Dona Marília
by artist: Dona Silvia
by artist: Rogério Gonçalves
by artist: David Acklin
by artist: Mathias Weibel
by artist: Hubert Saladin
by artist: Dona Carmen
by artist: Liane Ehlich
by artist: Maja Hünninger
by artist: Claire-Anne Piguet
by artist: Armin Bereuter
by artist: Stefano Mariani
by artist: Dona Angelika
by artist: Manoel Dias de Oliveira
by artist: Lorenz Raths
by artist: Dona Elma
by artist: Dona Valéria
by artist: Dona Luciana
by artist: Beat Mattmüller
by artist: Martin Zeller
by artist: Luiz Alves Da Silva
in album: Manoel Dias de Oliveira: Sacred Music from 18th Century Brasil, Vol. II
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T21:25:57Z
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PROSPERO Catalogue 2024 - Our Listening Tips II: Various Composers
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date published: 2024-12-06

Marcello: Estro Poetico-Armonico (Salmi 14, 21, 27, 38 - Sonata a tré, viola di gamba, violoncello e basso continuo)
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date published: 2017-11-10

Maurice Steger : A Portrait
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track: Concerto in F Major, RV 434, "Tutti gli instrumenti sordini": II. Largo e cantabile
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  genre: baroque
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  additional property: OTSVerifyInstructions
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    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T03:20:19Z
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Cervetto: 6 Sonatas for 3 Violoncellos
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track: Sonata No. 1 for 3 Cellos in A Minor: I. Adagio
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T03:20:19Z
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track: Sonata in A Major, Op. 1 No. 5: II. Largo
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OTSVerifyInstructions
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date published: 2026-07-08T03:20:19Z

Sonata No. 1 for 3 Cellos in A Minor: III. Minuetto II. Allegro
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Sonata in A Major, Op. 1 No. 5: I. Allegro
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
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Sonata in A Major, Op. 1 No. 5: II. Largo
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Sonata in A Major, Op. 1 No. 5: III. Minuettos I & II
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T18:48:12Z
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Sonata No. 6 for 3 Cellos in C Major: I. Adagio
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T08:56:20Z
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Schubert: Schwanengesang, D. 957: No. 9, Ihr Bild (Arr. for Arpeggione by Martin Zeller)
type: MusicAlbum
date published: 2024-06-21

Spohr: Faust: Polacca (Arr. for Arpeggione and Guitar by Vincenz Schuster)
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date published: 2024-06-14

Schubert: Arpeggione Sonata in A Minor, D. 821
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Schubert: Schwanengesang, D. 957: No 4, Ständchen (Arr. for Arpeggione, Guitar and Fortepiano by Martin Zeller)
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date published: 2024-05-31

Romberg: Cello Concerto No. 2 in A Major, Op. 3: II. Adagio (Arr. for Arpeggione and Guitar by Vincenz Schuster)
type: MusicAlbum
date published: 2024-05-24

Schubert: Violin Sonata No. 3 in G Minor, Op. 137 No.3 (Arr. for Arpeggione by Martin Zeller)
type: MusicAlbum
date published: 2024-05-17

Schubert: Violin Sonata No. 1 in D Major, Op. posth. 137/1, D.384 (Arr. for Arpeggione by Martin Zeller)
type: MusicAlbum
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Passion
type: MusicAlbum
date published: 2021-02-23

Pavans and Fantasies from the Age of Dowland
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  by artist: John Holloway
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  by artist: Renate Steinmann
  by artist: Susanna Hefti
  by artist: Martin Zeller
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  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
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    date published: 2026-07-31T00:26:26Z
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track: Fantasia à 5 upon One Note, Z. 745
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  by artist: John Holloway
  by artist: Monika Baer
  by artist: Renate Steinmann
  by artist: Susanna Hefti
  by artist: Martin Zeller
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    date published: 2014-03-21
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  genre: choral
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  additional property: OTSVerifyInstructions
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    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-02T03:55:08Z
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track: 2 Airs in G Minor a 4
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  by artist: William Lawes
  by artist: John Holloway
  by artist: Monika Baer
  by artist: Renate Steinmann
  by artist: Martin Zeller
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  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: 2 Airs in G Minor a 4
track: Fantasy for 3 Viols in E Minor [VdGS 10]
track: Canzonets to 2 Voices, Book 1: Fantasie a 2 "Il Lamento"
track: The Broken Consort I, Suite No. 3 in C Major: I. Fantasy for 2 Trebles and Bass
track: Set for 5 Viols in C Major: I. Fantasy

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f0c51b45164cefa26803616bef9de2bdd2e2853b2a0f8954d2bcb61063ec3a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEB331318904 — a six-check JSON result.
date published: 2026-07-31T18:48:12Z

2 Airs in G Minor a 4
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additional property: Acousticness
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Fantasy for 3 Viols in E Minor [VdGS 10]
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by artist: Monika Baer
by artist: Susanna Hefti
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T15:20:15Z
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Canzonets to 2 Voices, Book 1: Fantasie a 2 "Il Lamento"
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T16:09:41Z
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The Broken Consort I, Suite No. 3 in C Major: I. Fantasy for 2 Trebles and Bass
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additional property: OTSVerificationAPI
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-13T15:41:10Z
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Set for 5 Viols in C Major: I. Fantasy
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audio: Set for 5 Viols in C Major: I. Fantasy
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Sami sobě stínem
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Purcell: Fantazia IV, Z. 735
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Purcell: Fantazia VI, Z. 737
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Dialogues
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Sonata for Violoncello and Basso continuo, RV 42: I. Preludio. Largo
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:30:09Z
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Sonata for Violoncello and Basso continuo, RV 42: III. Sarabanda. Largo
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