Heath Quartet
type: MusicGroup
genre: chamber music
genre: classical
popularity: 19
followers: 654
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/224cf507-f216-4e5a-8752-bde382b2893f.ots
additional property: OTSRecordURL
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additional property: OTSVerificationAPI
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  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/224cf507-f216-4e5a-8752-bde382b2893f
additional property: OTSTimestamp
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additional property: OTSCanonicalRecord
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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 0x14a4cc93ac69cb680ef2dc061bfd8c2d5fdc813e005a9cdb4e5864bc185d5c30. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/224cf507-f216-4e5a-8752-bde382b2893f.json and https://artists.proofprofile.net/proofs/artist/224cf507-f216-4e5a-8752-bde382b2893f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T11:37:06Z
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album: harmonia mundi Autumn-winter 2016
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  date published: 2016-07-15
  track: Troisième Leçon de Ténèbres: Jerusalem, convertere
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    duration: PT2M9S
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    by artist: Lucy Crowe
    by artist: La Nuova Musica
    by artist: David Bates
    by artist: Elizabeth Watts
    in album: harmonia mundi Autumn-winter 2016
      type: MusicAlbum
      date published: 2016-07-15
    popularity: 2
    genre: classical
    genre: classical-era
    genre: early-music
    genre: baroque
    genre: french-baroque
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    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM11565920
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-31T06:42:11Z
    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 0x6a0e9223f341de43f310333a5442599e9ccb229e93fab3b8d3978b0351a956ea. 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/USHM11565920.
      date published: 2026-07-31T06:42:11Z
    audio: Troisième Leçon de Ténèbres: Jerusalem, convertere
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      additional property: Speechiness
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      additional property: Valence (Positivity)
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  track: Concerto No. 1 in B-Flat Major, HWV 332: II. Allegro ma non troppo
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    by artist: Freiburger Barockorchester
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      type: MusicAlbum
      date published: 2016-07-15
    popularity: 4
    genre: classical
    genre: opera
    genre: early-music
    genre: baroque
    genre: english-baroque
    genre: german-baroque
    genre: choral
    isrc code: FR7JM1637080
    additional property: CopyrightID
    additional property: CopyrightStatus
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    additional property: CopyrightRegisteredAt
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    additional property: CopyrightChainExplorerURL
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    additional property: OTSBitcoinBlock
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    additional property: OTSBitcoinBlockVerifyURL
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    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1637080
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-08T03:20:19Z
    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a438678a84f9ea6dd6a5992135f4e1a38071ea26d0ce9ec6f29023a5b7b229. 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/FR7JM1637080.
      date published: 2026-07-08T03:20:19Z
    audio: Concerto No. 1 in B-Flat Major, HWV 332: II. Allegro ma non troppo
      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: Energy
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      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
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album: Bracing Change 2
album: Berg: String Quartet – Webern: Langsamer Satz – Schoenberg: String Quartet No. 2
album: Bartok: Complete String Quartets
album: Raftery: Chamber Works
album: Tchaikovsky: String Quartets No. 1 & No. 3
album: Tippett String Quartets - Wigmore Hall Live
album: String Quaret No. 2, Op. 10: III. Langsam, 'Litanei'
album: Chanson Perpétuelle
album: harmonia mundi spring-summer 2017

Energy
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value: 0.078

Speechiness
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value: 0.033

Acousticness
type: PropertyValue
value: 0.937

Instrumentalness
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value: 0.869

Liveness
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value: 0.093

Valence (Positivity)
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value: 0.383

Loudness (dB)
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value: -23.719

Key Name
type: PropertyValue
value: F

Mode Name
type: PropertyValue
value: Major

Bracing Change 2
type: MusicAlbum
date published: 2023-04-07

Berg: String Quartet – Webern: Langsamer Satz – Schoenberg: String Quartet No. 2
type: MusicAlbum
date published: 2022-07-01

Bartok: Complete String Quartets
type: MusicAlbum
date published: 2017-06-09
track: String Quartet No. 1, Sz. 40: I. Lento
  type: MusicRecording
  duration: PT9M6S
  duration ms: 546920
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  by artist: Béla Bartók
  by artist: Heath Quartet
  in album: Bartok: Complete String Quartets
    type: MusicAlbum
    date published: 2017-06-09
  isrc code: FR7JM1677010
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  additional property: OTSVerificationAPI
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  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 0x34952e8ab4b034fca91308350d37f4c62516fa4d98e5b46d8016c3d2a1ff6d64. 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/FR7JM1677010.
    date published: 2026-07-02T03:55:08Z
  audio: String Quartet No. 1, Sz. 40: I. Lento
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    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
      type: PropertyValue
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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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track: String Quartet No. 1, Sz. 40: II. Allegretto
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  duration: PT10M7S
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  explicit: false
  by artist: Béla Bartók
  by artist: Heath Quartet
  in album: Bartok: Complete String Quartets
    type: MusicAlbum
    date published: 2017-06-09
  isrc code: FR7JM1677020
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
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  additional property: CopyrightRegisteredAt
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  additional property: CopyrightChainExplorerURL
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1677020
  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 0x4ea22f28504a2c55d728883087727410b23c62d743e50e9679993594fd8d6dea. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR7JM1677020.
    date published: 2026-07-31T12:24:41Z
  audio: String Quartet No. 1, Sz. 40: II. Allegretto
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    additional property: Tempo (BPM)
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track: String Quartet No. 2, Sz. 67: II. Allegro molto capriccioso
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  duration: PT8M3S
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  by artist: Béla Bartók
  by artist: Heath Quartet
  in album: Bartok: Complete String Quartets
    type: MusicAlbum
    date published: 2017-06-09
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  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: String Quartet No. 2, Sz. 67: II. Allegro molto capriccioso
track: String Quartet No. 1, Sz. 40: III. Allegro Vivace
track: String Quartet No. 3, Sz. 85: I. Prima parte (Moderato)
track: String Quartet No. 3, Sz. 85: II. Seconda Parte (Allegro)

OTSVerificationAPI
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value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1677140

OTSTimestamp
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value: 2026-07-08T03:20:19Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12fa1c515d92c7a4c8bbb348311594ef62f28a55ba715f91601ecfb0bf5ce1a. 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/FR7JM1677140.
date published: 2026-07-08T03:20:19Z

String Quartet No. 2, Sz. 67: II. Allegro molto capriccioso
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: 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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String Quartet No. 1, Sz. 40: III. Allegro Vivace
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duration: PT10M20S
duration ms: 620440
explicit: false
by artist: Béla Bartók
by artist: Heath Quartet
in album: Bartok: Complete String Quartets
  type: MusicAlbum
  date published: 2017-06-09
isrc code: FR7JM1677030
additional property: CopyrightID
additional property: CopyrightStatus
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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
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  date published: 2026-07-08T03:20:19Z
audio: String Quartet No. 1, Sz. 40: III. Allegro Vivace
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String Quartet No. 3, Sz. 85: I. Prima parte (Moderato)
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by artist: Heath Quartet
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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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
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa55ed0ce459a7b3be3ce7c0023a13b17be7a1c8ac50f06cfd1ce841dc80962b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR7JM1677040.
  date published: 2026-07-31T12:24:41Z
audio: String Quartet No. 3, Sz. 85: I. Prima parte (Moderato)
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String Quartet No. 3, Sz. 85: II. Seconda Parte (Allegro)
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duration: PT5M34S
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by artist: Béla Bartók
by artist: Heath Quartet
in album: Bartok: Complete String Quartets
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additional property: CopyrightStatus
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f6308ffaa9af2fe5ceb2b9a9055ad4bb744ed083f301d5b22c90eee8ca0018. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1677050.
  date published: 2026-07-31T18:48:12Z
audio: String Quartet No. 3, Sz. 85: II. Seconda Parte (Allegro)
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Raftery: Chamber Works
type: MusicAlbum
date published: 2017-05-19

Tchaikovsky: String Quartets No. 1 & No. 3
type: MusicAlbum
date published: 2016-11-18
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  by artist: Heath Quartet
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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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ba2ed399649625c314b12e5fe2241694d951d17a13cee4d5cdd2a78d149662. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM11566501.
    date published: 2026-07-02T05:09:12Z
  audio: String Quartet No. 1 in D Major, Op. 11, TH 111: I. Moderato e semplice
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track: String Quartet No. 1 in D Major, Op. 11, TH 111: II. Andante cantabile
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  additional property: OTSVerifyInstructions
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    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
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    date published: 2026-06-13T12:47:07Z
  audio: String Quartet No. 1 in D Major, Op. 11, TH 111: II. Andante cantabile
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  subject of: OpenTimestamps Proof of Existence
  audio: String Quartet No. 1 in D Major, Op. 11, TH 111: III. Scherzo (Allegro non tanto e con fuoco)
track: String Quartet No. 1 in D Major, Op. 11, TH 111: IV. Finale (Allegro giusto)
track: String Quartet No. 3 in E-Flat Minor, Op. 30, TH 113: I. Andante sostenuto - Allegro moderato - Andante sostenuto
track: String Quartet No. 3 in E-Flat Minor, Op. 30, TH 113: II. Allegretto vivo e scherzando
track: String Quartet No. 3 in E-Flat Minor, Op. 30, TH 113: III. Andante funebre e doloroso, ma con moto
track: String Quartet No. 3 in E-Flat Minor, Op. 30, TH 113: IV. Finale (Allegro non troppo e risoluto)

OTSVerificationAPI
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OTSTimestamp
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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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bd77eb46b593c18d6824fed4e2abf273af2c7aacfaf601aa5066e260fa2697. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/USHM11566503.
date published: 2026-07-22T16:23:52Z

String Quartet No. 1 in D Major, Op. 11, TH 111: III. Scherzo (Allegro non tanto e con fuoco)
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additional property: Mode (Major/Minor)
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additional property: Time Signature
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String Quartet No. 1 in D Major, Op. 11, TH 111: IV. Finale (Allegro giusto)
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaecde7729c884087f98c3f17160ebd71600b3088cbc01239bf6747a978d6733. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USHM11566504.
  date published: 2026-07-22T17:48:40Z
audio: String Quartet No. 1 in D Major, Op. 11, TH 111: IV. Finale (Allegro giusto)
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String Quartet No. 3 in E-Flat Minor, Op. 30, TH 113: I. Andante sostenuto - Allegro moderato - Andante sostenuto
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String Quartet No. 3 in E-Flat Minor, Op. 30, TH 113: II. Allegretto vivo e scherzando
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subject of: OpenTimestamps Proof of Existence
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String Quartet No. 3 in E-Flat Minor, Op. 30, TH 113: III. Andante funebre e doloroso, ma con moto
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-29T19:35:34Z
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String Quartet No. 3 in E-Flat Minor, Op. 30, TH 113: IV. Finale (Allegro non troppo e risoluto)
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-07T18:39:05Z
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Tippett String Quartets - Wigmore Hall Live
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    date published: 2026-07-30T01:32:48Z
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String Quaret No. 2, Op. 10: III. Langsam, 'Litanei'
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Chanson Perpétuelle
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harmonia mundi spring-summer 2017
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