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type: MusicGroup
genre: chamber music
genre: tango
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  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
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album: Scarlatti: 12 Sonatas
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  date published: 2024-02-09
  track: Sonata K. 99 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
  track: Sonata K. 87 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
  track: Sonata K. 32 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
  track: Sonata K. 519 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
  track: Sonata K. 202 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
  track: Sonata K. 24 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
  track: Sonata K. 455 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
  track: Sonata K. 162 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
  track: Sonata K. 531 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
  track: Sonata K. 466 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
  track: Sonata K. 8 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
  track: Sonata K. 386 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
album: Falconieri: La suave melodia
  type: MusicAlbum
  date published: 2008-04-09
album: Lhoyer: 3 Duo Concertants, Op. 31 - Duo Concertant, Op. 34, No. 2
  type: MusicAlbum
  date published: 2007-02-27
album: Scarlatti: Sonata K. 455
  type: MusicAlbum
  date published: 2024-01-26
album: Scarlatti: Sonata K. 87
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  date published: 2024-01-12
album: Scarlatti: Sonata, K. 32
  type: MusicAlbum
  date published: 2023-12-22
album: Scarlatti: Sonata K. 519
  type: MusicAlbum
  date published: 2023-12-01
album: Paganini: His Music, His Instruments
  type: MusicAlbum
  date published: 2018-05-11
album: Scienziati musici nel Rinascimento e nel primo Barocco
  type: MusicAlbum
  date published: 2019-06-26
album: Lhoyer: 3 Duo Concertants, Op. 31 / Duo Concertant, Op. 34, No. 2
  type: MusicAlbum
  date published: 2007-02-27
album: Piazzolla: Complete Guitar Music
  type: MusicAlbum
  date published: 2006-02-23
  track: Tango Suite: Tango No. 1
album: Italian Virtuosos of the Nineteenth Century
  type: MusicAlbum
  date published: 2000
album: Guitar Quintet, Op. 143: I. Allegro, vivo e schietto
  type: MusicAlbum
  date published: 2023-01-20
album: Rebay: Guitar Sonatas
  type: MusicAlbum
  date published: 2010-04-30
album: A. Scarlatti: Clori, Ninfa e amante, Arias & Cantatas
  type: MusicAlbum
  date published: 2013-10-21
album: Turina, Castelnuovo-Tedesco: Souvenir d'Espagne
  type: MusicAlbum
  date published: 2023-02-10
album: Guitar Collection, Vol. 8
  type: MusicAlbum
  date published: 2004-04-14

Sonata K. 99 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
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genre: early-music
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  date published: 2026-07-08T03:53:27Z
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Sonata K. 87 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
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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
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  date published: 2026-07-08T03:20:19Z
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Sonata K. 32 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
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additional property: OTSVerifyInstructions
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  date published: 2026-07-08T03:53:27Z
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Sonata K. 519 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
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  date published: 2026-07-08T03:53:27Z
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde820ff9f2ff890e5eecf14718ec359753353128255b317039376e283d14a49f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62210709.
  date published: 2026-07-08T03:39:04Z
audio: Sonata K. 202 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 95.672
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.434
  additional property: Energy
    type: PropertyValue
    value: 0.2
  additional property: Speechiness
    type: PropertyValue
    value: 0.037
  additional property: Acousticness
    type: PropertyValue
    value: 0.987
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.882
  additional property: Liveness
    type: PropertyValue
    value: 0.115
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.355
  additional property: Loudness (dB)
    type: PropertyValue
    value: -20.211
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Sonata K. 24 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
type: MusicRecording
duration: PT6M12S
duration ms: 372555
explicit: false
by artist: Domenico Scarlatti
by artist: Matteo Mela
by artist: Lorenzo Micheli
in album: Scarlatti: 12 Sonatas
  type: MusicAlbum
  date published: 2024-02-09
genre: classical
genre: early-music
genre: baroque
genre: italian-baroque
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123bb2fc6e905c770b9b786d5e414daa85ef715ab8582d7585931ed0136bed90. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FROV62210701.
  date published: 2026-07-30T14:36:16Z
audio: Sonata K. 24 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 124.837
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.423
  additional property: Energy
    type: PropertyValue
    value: 0.278
  additional property: Speechiness
    type: PropertyValue
    value: 0.034
  additional property: Acousticness
    type: PropertyValue
    value: 0.982
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.837
  additional property: Liveness
    type: PropertyValue
    value: 0.28
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.411
  additional property: Loudness (dB)
    type: PropertyValue
    value: -21.616
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: FROV62210701
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960264
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-30T14:36:16+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62210701
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960264
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960264
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T14:36:16+00:00
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

Sonata K. 455 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
type: MusicRecording
duration: PT3M36S
duration ms: 216244
explicit: false
by artist: Domenico Scarlatti
by artist: Matteo Mela
by artist: Lorenzo Micheli
in album: Scarlatti: 12 Sonatas
  type: MusicAlbum
  date published: 2024-02-09
genre: classical
genre: early-music
genre: baroque
genre: italian-baroque
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b83e3c6f191eae6968f7739b837e747851dc7d3b76037af0650d760f918896. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62210703.
  date published: 2026-07-31T15:20:15Z
audio: Sonata K. 455 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 134.043
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.427
  additional property: Energy
    type: PropertyValue
    value: 0.368
  additional property: Speechiness
    type: PropertyValue
    value: 0.032
  additional property: Acousticness
    type: PropertyValue
    value: 0.961
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.864
  additional property: Liveness
    type: PropertyValue
    value: 0.123
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.834
  additional property: Loudness (dB)
    type: PropertyValue
    value: -20.929
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: FROV62210703
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960418
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-31T15:20:15+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62210703
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960418
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960418
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T15:20:15+00:00
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

Sonata K. 162 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
type: MusicRecording
duration: PT6M2S
duration ms: 362836
explicit: false
by artist: Domenico Scarlatti
by artist: Matteo Mela
by artist: Lorenzo Micheli
in album: Scarlatti: 12 Sonatas
  type: MusicAlbum
  date published: 2024-02-09
genre: classical
genre: early-music
genre: baroque
genre: italian-baroque
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a319ccb8fce1e161fd5406860fe2fedcb32d987fe6148f3f1035bb70bd564f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62210705.
  date published: 2026-07-31T13:04:34Z
audio: Sonata K. 162 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 134.136
  additional property: Musical Key
    type: PropertyValue
    value: 11
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.517
  additional property: Energy
    type: PropertyValue
    value: 0.184
  additional property: Speechiness
    type: PropertyValue
    value: 0.038
  additional property: Acousticness
    type: PropertyValue
    value: 0.989
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.9
  additional property: Liveness
    type: PropertyValue
    value: 0.116
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.337
  additional property: Loudness (dB)
    type: PropertyValue
    value: -22.852
  additional property: Key Name
    type: PropertyValue
    value: B
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: FROV62210705
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960403
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-31T13:04:34+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62210705
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: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T13:04:34+00:00
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

Sonata K. 531 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
type: MusicRecording
duration: PT3M30S
duration ms: 210489
explicit: false
by artist: Domenico Scarlatti
by artist: Matteo Mela
by artist: Lorenzo Micheli
in album: Scarlatti: 12 Sonatas
  type: MusicAlbum
  date published: 2024-02-09
genre: classical
genre: early-music
genre: baroque
genre: italian-baroque
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bd76529d49657bb660001c442f13c9493960119ac0dcf69d45c0df28aa06c3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62210707.
  date published: 2026-07-31T00:26:26Z
audio: Sonata K. 531 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 122.301
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.434
  additional property: Energy
    type: PropertyValue
    value: 0.273
  additional property: Speechiness
    type: PropertyValue
    value: 0.034
  additional property: Acousticness
    type: PropertyValue
    value: 0.979
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.878
  additional property: Liveness
    type: PropertyValue
    value: 0.115
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.478
  additional property: Loudness (dB)
    type: PropertyValue
    value: -21.651
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: FROV62210707
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960327
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-31T00:26:26+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62210707
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960327
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960327
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T00:26:26+00:00
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

Sonata K. 466 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
type: MusicRecording
duration: PT6M49S
duration ms: 409484
explicit: false
by artist: Domenico Scarlatti
by artist: Matteo Mela
by artist: Lorenzo Micheli
in album: Scarlatti: 12 Sonatas
  type: MusicAlbum
  date published: 2024-02-09
genre: classical
genre: early-music
genre: baroque
genre: italian-baroque
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9118e2023ecb4d3f8a3be0292d640731cce8253d9b3ec962ce3a4ec6aaf5238. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62210710.
  date published: 2026-07-31T00:26:26Z
audio: Sonata K. 466 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 109.956
  additional property: Musical Key
    type: PropertyValue
    value: 4
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.368
  additional property: Energy
    type: PropertyValue
    value: 0.238
  additional property: Speechiness
    type: PropertyValue
    value: 0.036
  additional property: Acousticness
    type: PropertyValue
    value: 0.98
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.896
  additional property: Liveness
    type: PropertyValue
    value: 0.095
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.445
  additional property: Loudness (dB)
    type: PropertyValue
    value: -20.437
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Minor
isrc code: FROV62210710
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960327
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-31T00:26:26+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62210710
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960327
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960327
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T00:26:26+00:00
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

Sonata K. 8 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
type: MusicRecording
duration: PT3M55S
duration ms: 235638
explicit: false
by artist: Domenico Scarlatti
by artist: Matteo Mela
by artist: Lorenzo Micheli
in album: Scarlatti: 12 Sonatas
  type: MusicAlbum
  date published: 2024-02-09
genre: classical
genre: early-music
genre: baroque
genre: italian-baroque
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6506b0ae7dce1857f8702427e7b0f073823a572e8b6bcfd01752e856c98e27ae. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62210711.
  date published: 2026-08-01T00:10:46Z
audio: Sonata K. 8 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 100.662
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.452
  additional property: Energy
    type: PropertyValue
    value: 0.118
  additional property: Speechiness
    type: PropertyValue
    value: 0.043
  additional property: Acousticness
    type: PropertyValue
    value: 0.993
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.946
  additional property: Liveness
    type: PropertyValue
    value: 0.226
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.269
  additional property: Loudness (dB)
    type: PropertyValue
    value: -24.51
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Minor
isrc code: FROV62210711
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960485
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-08-01T00:10:46+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62210711
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960485
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960485
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-08-01T00:10:46+00:00
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

Sonata K. 386 (Arr. for Two Guitars by Matteo Mela & Lorenzo Micheli)
type: MusicRecording
duration: PT2M57S
duration ms: 177857
explicit: false
by artist: Domenico Scarlatti
by artist: Matteo Mela
by artist: Lorenzo Micheli
in album: Scarlatti: 12 Sonatas
  type: MusicAlbum
  date published: 2024-02-09
genre: classical
genre: early-music
genre: baroque
genre: italian-baroque
subject of: OpenTimestamps Proof of Existence
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Tango Suite: Tango No. 1
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by artist: Lorenzo Micheli
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in album: Piazzolla: Complete Guitar Music
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