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type: MusicGroup
genre: chamber music
popularity: 5
followers: 21
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSProofURL
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  value: https://artists.proofprofile.net/proofs/artist/e2d25e95-f0a2-41c6-94df-46c08807ad9a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e2d25e95-f0a2-41c6-94df-46c08807ad9a.json
additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f8d0ace7d8ded02c0e1e881912cab9ad47dd3c1b1bb1b16e152f44d025b79e. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2d25e95-f0a2-41c6-94df-46c08807ad9a.json and https://artists.proofprofile.net/proofs/artist/e2d25e95-f0a2-41c6-94df-46c08807ad9a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T10:35:31Z
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track: Octet in E-Flat, Op. 20: I. Allegro moderato ma con fuoco
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  duration: PT13M49S
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  by artist: Felix Mendelssohn
  by artist: James Ehnes
  by artist: Erin Keefe
  by artist: Andrew Wan
  by artist: Augustin Hadelich
  by artist: Cynthia Phelps
  by artist: Richard O'Neill
  by artist: Robert DeMaine
  by artist: Edward Arron
  by artist: Vladimir Ashkenazy
  in album: Mendelssohn: Violin Concerto & Octet in E-Flat
    type: MusicAlbum
    date published: 2010-11-01
  genre: classical
  genre: early-romantic-era
  genre: german-romanticism
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBPCP1000145
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:55:08Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa812b23d2249e104ee3f28cb55a9ce946cd0f29f47ce133d33906f07a41afabf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBPCP1000145.
    date published: 2026-07-02T03:55:08Z
  audio: Octet in E-Flat, Op. 20: I. Allegro moderato ma con fuoco
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track: Octet in E-Flat, Op. 20: II. Andante
  type: MusicRecording
  duration: PT6M31S
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  by artist: Felix Mendelssohn
  by artist: James Ehnes
  by artist: Erin Keefe
  by artist: Andrew Wan
  by artist: Augustin Hadelich
  by artist: Cynthia Phelps
  by artist: Richard O'Neill
  by artist: Robert DeMaine
  by artist: Edward Arron
  by artist: Vladimir Ashkenazy
  in album: Mendelssohn: Violin Concerto & Octet in E-Flat
    type: MusicAlbum
    date published: 2010-11-01
  genre: classical
  genre: early-romantic-era
  genre: german-romanticism
  isrc code: GBPCP1000146
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
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    value: 2026-07-30T01:02:53+00:00
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBPCP1000146
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-30T01:32:48Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc85c7fa5e7b39b5d9903d4168c9706bb36ba931a35e61d5e4fc88ce5704f0e. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/GBPCP1000146.
    date published: 2026-07-30T01:32:48Z
  audio: Octet in E-Flat, Op. 20: II. Andante
    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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track: Octet in E-Flat, Op. 20: III. Scherzo
track: Octet in E-Flat, Op. 20: IV. Presto

Danceability
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Liveness
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Valence (Positivity)
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value: 0.121

Loudness (dB)
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value: -29.035

Key Name
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Mode Name
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Octet in E-Flat, Op. 20: III. Scherzo
type: MusicRecording
duration: PT4M29S
duration ms: 269360
explicit: false
by artist: Felix Mendelssohn
by artist: James Ehnes
by artist: Erin Keefe
by artist: Andrew Wan
by artist: Augustin Hadelich
by artist: Cynthia Phelps
by artist: Richard O'Neill
by artist: Robert DeMaine
by artist: Edward Arron
by artist: Vladimir Ashkenazy
in album: Mendelssohn: Violin Concerto & Octet in E-Flat
  type: MusicAlbum
  date published: 2010-11-01
genre: classical
genre: early-romantic-era
genre: german-romanticism
isrc code: GBPCP1000147
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBPCP1000147
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-29T15:22:21Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545dc1746ce94142a6ebc69dc50448c84359b6c96e68a4743b95ae97d925b983. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GBPCP1000147.
  date published: 2026-07-29T15:22:21Z
audio: Octet in E-Flat, Op. 20: III. Scherzo
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  additional property: Tempo (BPM)
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Octet in E-Flat, Op. 20: IV. Presto
type: MusicRecording
duration: PT5M53S
duration ms: 353333
explicit: false
by artist: Felix Mendelssohn
by artist: James Ehnes
by artist: Erin Keefe
by artist: Andrew Wan
by artist: Augustin Hadelich
by artist: Cynthia Phelps
by artist: Richard O'Neill
by artist: Robert DeMaine
by artist: Edward Arron
by artist: Vladimir Ashkenazy
in album: Mendelssohn: Violin Concerto & Octet in E-Flat
  type: MusicAlbum
  date published: 2010-11-01
genre: classical
genre: early-romantic-era
genre: german-romanticism
isrc code: GBPCP1000148
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-06T08:21:29+00:00
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957073
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBPCP1000148
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23617f1a34d005b1ec15f79b18b05a90b5c6f101e75b0aaceb6f712fd8a7c266. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBPCP1000148.
  date published: 2026-07-07T18:39:05Z
audio: Octet in E-Flat, Op. 20: IV. Presto
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  additional property: Tempo (BPM)
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