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  track: Sonata for Flute and Violin, TWV 40:111: II. Scherzando - Version with Two Violins
  track: Sonata for Flute and Violin, TWV 40:111: III. Largo e misurato - Version with Two Violins
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  track: 4 Concerti for 4 Violins, Concerto in C Major, TWV 40:203: II. Allegro
  track: 6 Sonatas, Duetto No. 2 in A Minor, TWV 40:125: I. Vivace - Version with Two Violins
  track: 18 Canons Mélodieux, Sonate No. 3 in D Major, TWV 40:120: III. Allegro assai - Version with Two Violins
album: INTO NATURE 自然の中へ ヴィヴァルディ『四季』(全曲)と母なる大地の様々な音色たち
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album: Seicento
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album: 4 Concerti for 4 Violins, Concerto in G Major, TWV 40:201: I. Largo e staccato
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4 Concerti for 4 Violins, Concerto in G Major, TWV 40:201: IV. Vivace
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Sonata for Flute and Violin, TWV 40:111: I. Dolce - Version with Two Violins
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  date published: 2026-07-08T08:56:20Z
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Sonata for Flute and Violin, TWV 40:111: IV. Vivace e staccato - Version with Two Violins
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  date published: 2026-07-08T03:20:19Z
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4 Concerti for 4 Violins, Concerto in D Major, TWV 40:202: Ib. Allegro
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  date published: 2026-07-08T03:20:19Z
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4 Concerti for 4 Violins, Concerto in D Major, TWV 40:202: II. Grave
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4 Concerti for 4 Violins, Concerto in D Major, TWV 40:202: III. Allegro
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by artist: Enrico Onofri
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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additional property: ProofProfileEvidenceStatus
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T08:56:20Z
audio: 4 Concerti for 4 Violins, Concerto in D Major, TWV 40:202: III. Allegro
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4 Concerti for 4 Violins, Concerto in G Major, TWV 40:201: I. Largo e staccato
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duration: PT2M27S
duration ms: 147026
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by artist: Enrico Onofri
by artist: Imaginarium Ensemble
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T09:09:19Z
audio: 4 Concerti for 4 Violins, Concerto in G Major, TWV 40:201: I. Largo e staccato
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additional property: OTSVerifyInstructions
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4 Concerti for 4 Violins, Concerto in G Major, TWV 40:201: II. Allegro
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duration: PT1M27S
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explicit: false
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by artist: Enrico Onofri
by artist: Imaginarium Ensemble
in album: Telemann: Works for Violins Without Bass
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T19:42:40Z
audio: 4 Concerti for 4 Violins, Concerto in G Major, TWV 40:201: II. Allegro
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additional property: OTSVerifyInstructions
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4 Concerti for 4 Violins, Concerto in G Major, TWV 40:201: III. Adagio
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by artist: Enrico Onofri
by artist: Imaginarium Ensemble
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T20:22:46Z
audio: 4 Concerti for 4 Violins, Concerto in G Major, TWV 40:201: III. Adagio
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additional property: OTSVerifyInstructions
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Sonata for Flute and Violin, TWV 40:111: II. Scherzando - Version with Two Violins
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by artist: Georg Philipp Telemann
by artist: Enrico Onofri
by artist: Imaginarium Ensemble
in album: Telemann: Works for Violins Without Bass
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T12:24:41Z
audio: Sonata for Flute and Violin, TWV 40:111: II. Scherzando - Version with Two Violins
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additional property: OTSVerifyInstructions
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Sonata for Flute and Violin, TWV 40:111: III. Largo e misurato - Version with Two Violins
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by artist: Enrico Onofri
by artist: Imaginarium Ensemble
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T18:48:12Z
audio: Sonata for Flute and Violin, TWV 40:111: III. Largo e misurato - Version with Two Violins
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additional property: CopyrightID
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additional property: OTSVerifyInstructions
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4 Concerti for 4 Violins, Concerto in D Major, TWV 40:202: Ia. Adagio
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by artist: Enrico Onofri
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T06:42:11Z
audio: 4 Concerti for 4 Violins, Concerto in D Major, TWV 40:202: Ia. Adagio
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additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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additional property: ContentHash
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additional property: BitcoinTime
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additional property: OTSVerificationAPI
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch

6 Sonatas, Duetto No. 1 in G Major, TWV 40:124: I. Vivace - Version with Two Violins
type: MusicRecording
duration: PT4M55S
duration ms: 295600
explicit: false
by artist: Georg Philipp Telemann
by artist: Enrico Onofri
by artist: Imaginarium Ensemble
in album: Telemann: Works for Violins Without Bass
  type: MusicAlbum
  date published: 2023-01-06
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92100e742b0dd8e3d52abd9dccded5ea34b70538917ab3d3f45106cd4e66f028. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEE022212613.
  date published: 2026-07-31T19:53:13Z
audio: 6 Sonatas, Duetto No. 1 in G Major, TWV 40:124: I. Vivace - Version with Two Violins
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  additional property: Tempo (BPM)
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  additional property: Acousticness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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isrc code: BEE022212613
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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additional property: BitcoinTime
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additional property: OTSVerificationAPI
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T19:53:13+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

6 Sonatas, Duetto No. 1 in G Major, TWV 40:124: II. Allegretto - Version with Two Violins
type: MusicRecording
duration: PT2M23S
duration ms: 143053
explicit: false
by artist: Georg Philipp Telemann
by artist: Enrico Onofri
by artist: Imaginarium Ensemble
in album: Telemann: Works for Violins Without Bass
  type: MusicAlbum
  date published: 2023-01-06
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ea8d6235b20b7adc92ae92e3b3d6ffcc1d892670b46ded831a74e674c79b8d. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEE022212614.
  date published: 2026-07-31T13:06:57Z
audio: 6 Sonatas, Duetto No. 1 in G Major, TWV 40:124: II. Allegretto - Version with Two Violins
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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isrc code: BEE022212614
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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additional property: ContentHash
additional property: BitcoinBlock
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additional property: BitcoinTime
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T13:06:57+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

6 Sonatas, Duetto No. 3 in B Minor, TWV 40:126: III. Allegro - Version with Two Violins
type: MusicRecording
duration: PT1M39S
duration ms: 99146
explicit: false
by artist: Georg Philipp Telemann
by artist: Enrico Onofri
by artist: Imaginarium Ensemble
in album: Telemann: Works for Violins Without Bass
  type: MusicAlbum
  date published: 2023-01-06
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbaae885c4ca5ec841277bd8258b8d3a8b8697ddcff8d877259a0a9e44473f1. 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/BEE022212618.
  date published: 2026-07-31T15:20:15Z
audio: 6 Sonatas, Duetto No. 3 in B Minor, TWV 40:126: III. Allegro - Version with Two Violins
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
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  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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  additional property: Key Name
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  additional property: Mode Name
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isrc code: BEE022212618
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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additional property: ContentHash
additional property: BitcoinBlock
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additional property: BitcoinTime
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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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

4 Concerti for 4 Violins, Concerto in C Major, TWV 40:203: II. Allegro
type: MusicRecording
duration: PT3M9S
duration ms: 189920
explicit: false
by artist: Georg Philipp Telemann
by artist: Enrico Onofri
by artist: Imaginarium Ensemble
in album: Telemann: Works for Violins Without Bass
  type: MusicAlbum
  date published: 2023-01-06
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa639128973b86bceb9a8c75e183801f4f9ca78691de01453cae466d0d3c608ca. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEE022212620.
  date published: 2026-07-31T06:42:11Z
audio: 4 Concerti for 4 Violins, Concerto in C Major, TWV 40:203: II. Allegro
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.421
  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
    value: 0.045
  additional property: Acousticness
    type: PropertyValue
    value: 0.985
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.751
  additional property: Liveness
    type: PropertyValue
    value: 0.074
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.567
  additional property: Loudness (dB)
    type: PropertyValue
    value: -20.304
  additional property: Key Name
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    value: F#
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: BEE022212620
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
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additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
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additional property: BitcoinTime
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSTimestamp
  type: PropertyValue
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch

6 Sonatas, Duetto No. 2 in A Minor, TWV 40:125: I. Vivace - Version with Two Violins
type: MusicRecording
duration: PT1M24S
duration ms: 84533
explicit: false
by artist: Georg Philipp Telemann
by artist: Enrico Onofri
by artist: Imaginarium Ensemble
in album: Telemann: Works for Violins Without Bass
  type: MusicAlbum
  date published: 2023-01-06
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefddb1a37c9859dda571d87a36ce2e7b2e57b172346cc6ded907f1713e0d2cdb. 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/BEE022212623.
  date published: 2026-07-31T13:04:34Z
audio: 6 Sonatas, Duetto No. 2 in A Minor, TWV 40:125: I. Vivace - Version with Two Violins
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.507
  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
    type: PropertyValue
    value: 0.986
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.797
  additional property: Liveness
    type: PropertyValue
    value: 0.082
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.693
  additional property: Loudness (dB)
    type: PropertyValue
    value: -26.132
  additional property: Key Name
    type: PropertyValue
    value: Eb
  additional property: Mode Name
    type: PropertyValue
    value: Minor
isrc code: BEE022212623
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
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additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
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additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-31T13:04:34+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSTimestamp
  type: PropertyValue
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch

18 Canons Mélodieux, Sonate No. 3 in D Major, TWV 40:120: III. Allegro assai - Version with Two Violins
type: MusicRecording
duration: PT1M39S
duration ms: 99053
explicit: false
by artist: Georg Philipp Telemann
by artist: Enrico Onofri
by artist: Imaginarium Ensemble
in album: Telemann: Works for Violins Without Bass
  type: MusicAlbum
  date published: 2023-01-06
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52fc4be586e9c2b84806708a5f40c1e52f5015685baa29224a83501db2ca22c. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEE022212628.
  date published: 2026-07-31T13:50:38Z
audio: 18 Canons Mélodieux, Sonate No. 3 in D Major, TWV 40:120: III. Allegro assai - Version with Two Violins
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.416
  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
    value: 0.047
  additional property: Acousticness
    type: PropertyValue
    value: 0.987
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.773
  additional property: Liveness
    type: PropertyValue
    value: 0.042
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.899
  additional property: Loudness (dB)
    type: PropertyValue
    value: -23.157
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: BEE022212628
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: 960410
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-31T13:50:38+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEE022212628
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSTimestamp
  type: PropertyValue
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch