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genre: german-baroque
description: Johann Kropfgans (Kropffgans, Kropffganss; 14 October 1708 – c. 1770) was a German lutenist and composer. Kropfgans was born in Breslau into the family of Johann Kropfgans Sr. He and his siblings Joh
popularity: 3
followers: 141
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album: Kropfgans: Lute Concerto / Lute Sonatas / Divertimentos
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  date published: 2005-01-01
album: Johann Kropfgans (1708-c.1770): Lute Concerto, Sonatas & Divertimentos
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album: German Lute Music of the 18th Century
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  track: Chaconne in G Minor
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-08T03:53:27Z
    audio: Chaconne in G Minor
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  track: A Solo: II. Courante
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    subject of: OpenTimestamps Proof of Existence
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    audio: A Solo: II. Courante
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  track: Lute Sonata in A Minor: III. Spiritoso
  track: Lute Sonata in E-Flat Major: II. Courante
  track: Lute Sonata in A Minor: IV. Vivace
  track: A Solo: IV. Menuet
  track: Lute Sonata No. 51 in G Minor: III. Bourree
  track: Lute Sonata No. 51 in G Minor: V. Menuet
  track: Lute Sonata No. 2: II. Siciliano
  track: Lute Sonata No. 51 in G Minor: VI. Presto
  track: Lute Sonata No. 2: IV. Poloneso
  track: Fantasie in D Minor
  track: Lute Sonata in D Minor: II. Andante
  track: Lute Sonata No. 1: I. Allegro
album: Giuliano Carmignola - The Complete Sony Recordings
album: Music for Lute, Violin & Violincello
album: Romance of the Lute
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Lute Sonata in A Minor: III. Spiritoso
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subject of: OpenTimestamps Proof of Existence
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Lute Sonata in E-Flat Major: II. Courante
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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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Lute Sonata in A Minor: IV. Vivace
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:39:04Z
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subject of: OpenTimestamps Proof of Existence
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  additional property: Mode Name
    type: PropertyValue
    value: Major

Lute Sonata No. 51 in G Minor: III. Bourree
type: MusicRecording
duration: PT5M27S
duration ms: 327493
explicit: false
by artist: Silvius Leopold Weiss
by artist: Alberto Crugnola
in album: German Lute Music of the 18th Century
  type: MusicAlbum
  date published: 2012-03-06
isrc code: DEB901200313
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T15:00:35+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4fb92df77d2b7ba1da153616c86067a3ccc523650abb1497cf70a899d98852cb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957124
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/957124
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB901200313
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 → block OTSBitcoinBlock must exist at that height 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb92df77d2b7ba1da153616c86067a3ccc523650abb1497cf70a899d98852cb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB901200313.
  date published: 2026-07-08T03:53:27Z
audio: Lute Sonata No. 51 in G Minor: III. Bourree
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 146.204
  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: 0.365
  additional property: Energy
    type: PropertyValue
    value: 0.183
  additional property: Speechiness
    type: PropertyValue
    value: 0.045
  additional property: Acousticness
    type: PropertyValue
    value: 0.994
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.925
  additional property: Liveness
    type: PropertyValue
    value: 0.099
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.704
  additional property: Loudness (dB)
    type: PropertyValue
    value: -26.71
  additional property: Key Name
    type: PropertyValue
    value: F#
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Lute Sonata No. 51 in G Minor: V. Menuet
type: MusicRecording
duration: PT3M59S
duration ms: 239386
explicit: false
by artist: Silvius Leopold Weiss
by artist: Alberto Crugnola
in album: German Lute Music of the 18th Century
  type: MusicAlbum
  date published: 2012-03-06
isrc code: DEB901200315
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T22:39:53+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5749eccc3c7398eda6f7f35e0052713c035e5e9eb8b444921c3607d869cbede4
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957124
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/957124
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB901200315
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 → block OTSBitcoinBlock must exist at that height 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5749eccc3c7398eda6f7f35e0052713c035e5e9eb8b444921c3607d869cbede4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB901200315.
  date published: 2026-07-08T03:53:27Z
audio: Lute Sonata No. 51 in G Minor: V. Menuet
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 142.968
  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: 0.418
  additional property: Energy
    type: PropertyValue
    value: 0.16
  additional property: Speechiness
    type: PropertyValue
    value: 0.043
  additional property: Acousticness
    type: PropertyValue
    value: 0.994
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.905
  additional property: Liveness
    type: PropertyValue
    value: 0.097
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.711
  additional property: Loudness (dB)
    type: PropertyValue
    value: -27.017
  additional property: Key Name
    type: PropertyValue
    value: F#
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Lute Sonata No. 2: II. Siciliano
type: MusicRecording
duration: PT4M20S
duration ms: 260279
explicit: false
by artist: Rudolf Straube
by artist: Alberto Crugnola
in album: German Lute Music of the 18th Century
  type: MusicAlbum
  date published: 2012-03-06
isrc code: DEB901200332
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T17:12:43+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xaee880e542ade1075364ad17b7979001e3176256f6ec8e8fb6399c43cb427498
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957145
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/957145
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB901200332
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T08:56:20Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee880e542ade1075364ad17b7979001e3176256f6ec8e8fb6399c43cb427498. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB901200332.
  date published: 2026-07-08T08:56:20Z
audio: Lute Sonata No. 2: II. Siciliano
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 140.765
  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: 0.532
  additional property: Energy
    type: PropertyValue
    value: 0.048
  additional property: Speechiness
    type: PropertyValue
    value: 0.048
  additional property: Acousticness
    type: PropertyValue
    value: 0.973
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.887
  additional property: Liveness
    type: PropertyValue
    value: 0.106
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.046
  additional property: Loudness (dB)
    type: PropertyValue
    value: -27.45
  additional property: Key Name
    type: PropertyValue
    value: F#
  additional property: Mode Name
    type: PropertyValue
    value: Major

Lute Sonata No. 51 in G Minor: VI. Presto
type: MusicRecording
duration: PT5M22S
duration ms: 322333
explicit: false
by artist: Silvius Leopold Weiss
by artist: Alberto Crugnola
in album: German Lute Music of the 18th Century
  type: MusicAlbum
  date published: 2012-03-06
isrc code: DEB901200316
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T16:56:00+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x566ffbcde1d562560a3f90daeb97801f1b912fb3259820ea28dcc2bd91a51884
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957120
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/957120
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB901200316
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 → block OTSBitcoinBlock must exist at that height 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566ffbcde1d562560a3f90daeb97801f1b912fb3259820ea28dcc2bd91a51884. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB901200316.
  date published: 2026-07-08T03:22:41Z
audio: Lute Sonata No. 51 in G Minor: VI. Presto
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 148.998
  additional property: Musical Key
    type: PropertyValue
    value: 6
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.319
  additional property: Energy
    type: PropertyValue
    value: 0.231
  additional property: Speechiness
    type: PropertyValue
    value: 0.045
  additional property: Acousticness
    type: PropertyValue
    value: 0.993
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.923
  additional property: Liveness
    type: PropertyValue
    value: 0.105
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.732
  additional property: Loudness (dB)
    type: PropertyValue
    value: -25.912
  additional property: Key Name
    type: PropertyValue
    value: F#
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Lute Sonata No. 2: IV. Poloneso
type: MusicRecording
duration: PT3M21S
duration ms: 201226
explicit: false
by artist: Rudolf Straube
by artist: Alberto Crugnola
in album: German Lute Music of the 18th Century
  type: MusicAlbum
  date published: 2012-03-06
isrc code: DEB901200334
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T19:25:03+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x556e347f1ccf1371097cb7a3336bed1d451059221b7924e1ff0ea4337cd15f8e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957145
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/957145
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB901200334
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T08:56:20Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556e347f1ccf1371097cb7a3336bed1d451059221b7924e1ff0ea4337cd15f8e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB901200334.
  date published: 2026-07-08T08:56:20Z
audio: Lute Sonata No. 2: IV. Poloneso
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 151.863
  additional property: Musical Key
    type: PropertyValue
    value: 6
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.453
  additional property: Energy
    type: PropertyValue
    value: 0.123
  additional property: Speechiness
    type: PropertyValue
    value: 0.041
  additional property: Acousticness
    type: PropertyValue
    value: 0.979
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.901
  additional property: Liveness
    type: PropertyValue
    value: 0.114
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.527
  additional property: Loudness (dB)
    type: PropertyValue
    value: -25.926
  additional property: Key Name
    type: PropertyValue
    value: F#
  additional property: Mode Name
    type: PropertyValue
    value: Major

Fantasie in D Minor
type: MusicRecording
duration: PT0M47S
duration ms: 47226
explicit: false
by artist: Johann Friedrich Daube
by artist: Alberto Crugnola
in album: German Lute Music of the 18th Century
  type: MusicAlbum
  date published: 2012-03-06
isrc code: DEB901200335
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T17:34:07+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6236e0a4e54cbc7f0e491dbc25225bbcfb804ffed1e01f4e8476222fae44e448
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957145
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/957145
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB901200335
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T08:56:20Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6236e0a4e54cbc7f0e491dbc25225bbcfb804ffed1e01f4e8476222fae44e448. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB901200335.
  date published: 2026-07-08T08:56:20Z
audio: Fantasie in D Minor
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 101.241
  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: 0.416
  additional property: Energy
    type: PropertyValue
    value: 0.171
  additional property: Speechiness
    type: PropertyValue
    value: 0.057
  additional property: Acousticness
    type: PropertyValue
    value: 0.967
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.873
  additional property: Liveness
    type: PropertyValue
    value: 0.124
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.246
  additional property: Loudness (dB)
    type: PropertyValue
    value: -23.613
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Lute Sonata in D Minor: II. Andante
type: MusicRecording
duration: PT2M9S
duration ms: 129759
explicit: false
by artist: Johann Friedrich Daube
by artist: Alberto Crugnola
in album: German Lute Music of the 18th Century
  type: MusicAlbum
  date published: 2012-03-06
isrc code: DEB901200337
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T17:59:09+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x70952f7d651eba020a18facd407bdc3c030c60e0211728541e06bbc5798c8ea6
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957118
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB901200337
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 → block OTSBitcoinBlock must exist at that height 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70952f7d651eba020a18facd407bdc3c030c60e0211728541e06bbc5798c8ea6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB901200337.
  date published: 2026-07-08T03:20:19Z
audio: Lute Sonata in D Minor: II. Andante
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 131.355
  additional property: Musical Key
    type: PropertyValue
    value: 8
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.491
  additional property: Energy
    type: PropertyValue
    value: 0.147
  additional property: Speechiness
    type: PropertyValue
    value: 0.049
  additional property: Acousticness
    type: PropertyValue
    value: 0.95
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.862
  additional property: Liveness
    type: PropertyValue
    value: 0.122
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.388
  additional property: Loudness (dB)
    type: PropertyValue
    value: -23.246
  additional property: Key Name
    type: PropertyValue
    value: Ab
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Lute Sonata No. 1: I. Allegro
type: MusicRecording
duration: PT4M58S
duration ms: 298533
explicit: false
by artist: Rudolf Straube
by artist: Alberto Crugnola
in album: German Lute Music of the 18th Century
  type: MusicAlbum
  date published: 2012-03-06
isrc code: DEB901200342
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T21:56:44+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdd016273944387fd028b9f11e3aba221647e7c032f4a07ad9aca999ed4346db6
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957145
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/957145
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB901200342
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T08:56:20Z
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track: The Four Seasons - Violin Concerto in E Major, Op. 8, No. 1, RV 269 "La primavera": II. Largo
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track: Violin Concerto in E-Flat Major, RV 257: I. Andante molto e quasi allegro
track: Violin Concerto in D Major, RV 211: II. Larghetto

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Concerto in D Minor for Violin, RV 235: I. Allegro non molto
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The Four Seasons - Violin Concerto in G Minor, Op. 8, No. 2, RV 315 "L'estate": II. Adagio
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The Four Seasons - Violin Concerto in G Minor, Op. 8, No. 2, RV 315 "L'estate": III. Presto
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The Four Seasons - Violin Concerto in F Major, Op. 8, No. 3, RV 293 "L'autunno": I. Allegro
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Concerto in E Minor for Violin, RV 273: I. Allegro non molto
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The Four Seasons - Violin Concerto in F Major, Op. 8, No. 3, RV 293 "L'autunno": II. Adagio molto
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Concerto in E Minor for Violin, RV 273: II. Largo
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Concerto in E Minor for Violin, RV 273: III. Allegro
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The Four Seasons - Violin Concerto in F Minor, Op. 8, No. 4, RV 297 "L'inverno": I. Allegro non molto
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The Four Seasons - Violin Concerto in F Minor, Op. 8, No. 4, RV 297 "L'inverno": II. Largo
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The Four Seasons - Violin Concerto in F Minor, Op. 8, No. 4, RV 297 "L'inverno": III. Allegro
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Violin Concerto in E-Flat Major, RV 257: I. Andante molto e quasi allegro
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Violin Concerto in D Major, RV 211: II. Larghetto
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Music for Lute, Violin & Violincello
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  audio: Sonate in D Minor for Lute & Violin: I. Allegro maestoso
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Romance of the Lute
type: MusicAlbum
date published: 2011-11-01

German Lute Music
type: MusicAlbum
date published: 2019-11-15