Wiener Oktett
type: MusicGroup
genre: chamber music
genre: classical
popularity: 15
followers: 166
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe9feb76aa8ba206b1eab9de47a65e905b79a58703cb2099399a653ef5820c4e9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953614
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953614
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/182f1a26-3251-4de5-95a8-aeceabf96e28.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/182f1a26-3251-4de5-95a8-aeceabf96e28.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/182f1a26-3251-4de5-95a8-aeceabf96e28
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T08:40:32Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe9feb76aa8ba206b1eab9de47a65e905b79a58703cb2099399a653ef5820c4e9","name":"Wiener Oktett","registered_at":"2026-06-14T06:55:44Z","symbol":"NIM0373656","token_address":"0x4e24d742f728c42a76a770642d6c55d5bd28bfa2","type":"artist","uuid":"182f1a26-3251-4de5-95a8-aeceabf96e28"}
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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9feb76aa8ba206b1eab9de47a65e905b79a58703cb2099399a653ef5820c4e9. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/182f1a26-3251-4de5-95a8-aeceabf96e28.json and https://artists.proofprofile.net/proofs/artist/182f1a26-3251-4de5-95a8-aeceabf96e28.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-14T08:40:32Z
  text: {"copyright_id":"0xe9feb76aa8ba206b1eab9de47a65e905b79a58703cb2099399a653ef5820c4e9","name":"Wiener Oktett","registered_at":"2026-06-14T06:55:44Z","symbol":"NIM0373656","token_address":"0x4e24d742f728c42a76a770642d6c55d5bd28bfa2","type":"artist","uuid":"182f1a26-3251-4de5-95a8-aeceabf96e28"}
album: Dvořák: Quartet Op. 96 & Quintet Op. 97
  type: MusicAlbum
  date published: 1990-03-13
album: Spohr: Octet, Op. 32; Poot: Octet (Vienna Octet — Complete Decca Recordings Vol. 10)
  type: MusicAlbum
  date published: 2024-01-19
album: Schubert: Piano Quintet, D. 667 "Trout"; Spohr: Nonet, Op. 31 (Vienna Octet — Complete Decca Recordings Vol. 4)
  type: MusicAlbum
  date published: 2024-01-19
album: Schubert: Piano Quintet, D. 667 "Trout"; Beethoven: Septet, Op. 20 (Vienna Octet — Complete Decca Recordings Vol. 12)
  type: MusicAlbum
  date published: 2024-01-19
album: Mozart: Divertimento in D Major, K. 334; Divertimento in F Major, K. 247 (Vienna Octet — Complete Decca Recordings Vol. 3)
  type: MusicAlbum
  date published: 2024-01-19
album: Mozart: Divertimento No. 15 in B-Flat Major, K. 287; Divertimento in E-Flat Major, K. 113 (Vienna Octet — Complete Decca Recordings Vol. 8)
  type: MusicAlbum
  date published: 2024-01-19
album: Mendelssohn: Octet, Op. 20; Schubert: Octet, D. 803 (Vienna Octet — Complete Decca Recordings Vol. 2)
  type: MusicAlbum
  date published: 2024-01-19
album: Kreutzer: Grand Septet, Op. 62; Beethoven: Septet, Op. 20 (Vienna Octet — Complete Decca Recordings Vol. 1)
  type: MusicAlbum
  date published: 2024-01-19
album: Brahms: Clarinet Quintet, Op. 115; Mozart: Clarinet Quintet, K. 581 (Vienna Octet — Complete Decca Recordings Vol. 5)
  type: MusicAlbum
  date published: 2024-01-19
album: Beethoven: Piano Quintet, Op. 16; Spohr: Octet, Op. 32 (Vienna Octet — Complete Decca Recordings Vol. 13)
  type: MusicAlbum
  date published: 2024-01-19
album: Mendelssohn: Octet
  type: MusicAlbum
  date published: 2013-09-20
album: Mozart: Five Divertimenti
  type: MusicAlbum
  date published: 2013-01-01
album: Spohr: Piano Quintet; Double Quartet; Octet; Nonet
  type: MusicAlbum
  date published: 2012-01-01
album: Brahms: Clarinet Quintet; Mozart: Clarinet Quintet; Baermann: Adagio
  type: MusicAlbum
  date published: 2012-01-01
album: Mendelssohn: Octet; Schubert: Piano Quintet in A - "Trout"; Octet
  type: MusicAlbum
  date published: 2010-01-01
album: 20th-Century Chamber Music
  type: MusicAlbum
  date published: 2010-01-01
album: Schubert: Octet in F / Spohr: Octet in E
  type: MusicAlbum
  date published: 2000-01-01
album: Beethoven: Septet, Op. 20; Sextet, Op. 71 (New Vienna Octet; Vienna Wind Soloists — Complete Decca Recordings Vol. 8)
  type: MusicAlbum
  date published: 1994
album: Schubert: Octet, D. 803; Minuet and Finale for Wind Octet, D. 72 (New Vienna Octet; Vienna Wind Soloists — Complete Decca Recordings Vol. 7)
  type: MusicAlbum
  date published: 1992
album: Dvořák: Sextet Op. 48; Quintet Op. 77
  type: MusicAlbum
  date published: 1991-01-01
  track: String Sextet in A Major, Op. 48, B. 80: I. Allegro moderato
    type: MusicRecording
    duration: PT13M27S
    duration ms: 807000
    explicit: false
    by artist: Antonín Dvořák
    by artist: Wiener Oktett
    in album: Dvořák: Sextet Op. 48; Quintet Op. 77
      type: MusicAlbum
      date published: 1991-01-01
    genre: classical
    genre: late-romantic-era
    genre: czech-classical
    isrc code: GBF077111401
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-08-01T03:24:52+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x532ee4d9b7cf36bec8dc15b2b4270aa1bd665f1047f6896b6ebf2f00a3305afd
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 960506
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/960506
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077111401
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-08-01T03:50:58Z
    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 0x532ee4d9b7cf36bec8dc15b2b4270aa1bd665f1047f6896b6ebf2f00a3305afd. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077111401 — a six-check JSON result.
      date published: 2026-08-01T03:50:58Z
    audio: String Sextet in A Major, Op. 48, B. 80: I. Allegro moderato
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 99.949
      additional property: Musical Key
        type: PropertyValue
        value: 6
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 5
      additional property: Danceability
        type: PropertyValue
        value: 0.159
      additional property: Energy
        type: PropertyValue
        value: 0.105
      additional property: Speechiness
        type: PropertyValue
        value: 0.045
      additional property: Acousticness
        type: PropertyValue
        value: 0.929
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.656
      additional property: Liveness
        type: PropertyValue
        value: 0.222
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.14
      additional property: Loudness (dB)
        type: PropertyValue
        value: -23.589
      additional property: Key Name
        type: PropertyValue
        value: F#
      additional property: Mode Name
        type: PropertyValue
        value: Minor
  track: String Sextet in A Major, Op. 48, B. 80: II. Dumka. Poco allegretto
    type: MusicRecording
    duration: PT7M13S
    duration ms: 433493
    explicit: false
    by artist: Antonín Dvořák
    by artist: Wiener Oktett
    in album: Dvořák: Sextet Op. 48; Quintet Op. 77
      type: MusicAlbum
      date published: 1991-01-01
    genre: classical
    genre: late-romantic-era
    genre: czech-classical
    isrc code: GBF077111402
    additional property: CopyrightID
    additional property: CopyrightStatus
    additional property: CopyrightRegisteredAt
    additional property: CopyrightChainExplorerURL
    additional property: OTSHash
    additional property: OTSBitcoinBlock
    additional property: OTSBitcoinBlockVerifyURL
    additional property: OTSVerificationAPI
    additional property: OTSTimestamp
    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
    audio: String Sextet in A Major, Op. 48, B. 80: II. Dumka. Poco allegretto
album: Mendelssohn: Octet / Beethoven: Septet
album: Mendelssohn: Octet, Op. 20; Rimsky-Korsakov: Quintet (Vienna Octet — Complete Decca Recordings Vol. 27)
album: Dvořák: String Sextet, Op. 48; String Quintet, Op. 97 (Vienna Octet — Complete Decca Recordings Vol. 25)
album: Badings: Octet, Op. 67 (Vienna Octet — Complete Decca Recordings Vol. 26)
album: Mendelssohn: Piano Sextet, Op. 110; Borodin: Piano Quintet (Vienna Octet — Complete Decca Recordings Vol. 21)
album: Kreutzer: Grand Septet; Berwald: Grand Septet (Vienna Octet — Complete Decca Recordings Vol. 22)
album: Dvořák: String Quintet, Op. 77; Spohr: Quintet, Op. 52 (Vienna Octet — Complete Decca Recordings Vol. 23)
album: Beethoven: Quintet, Op. 29; Sextet, Op. 81b (Vienna Octet — Complete Decca Recordings Vol. 24)
album: Spohr: Nonet, Op. 31; Double Quartet, Op. 87 (Vienna Octet — Complete Decca Recordings Vol. 20)
album: Mozart: Divertimento, K. 205; March, K. 290; Cassation, K. 99 (Vienna Octet — Complete Decca Recordings Vol. 18)
album: Britten: Sinfonietta, Op. 1; Hindemith: Octet (Vienna Octet — Complete Decca Recordings Vol. 19)
album: Mozart: Divertimento, K. 287; M. Haydn: Divertimento (Vienna Octet — Complete Decca Recordings Vol. 16)
album: Mozart: Clarinet Quintet, K. 581; Divertimento, K. 247 (Vienna Octet — Complete Decca Recordings Vol. 17)
album: Mozart: Divertissements, K. 334 & K. 136 (Stereo Version)
album: Mozart: Divertimentos, K. 136 & 334 (Mono Version)
album: Mozart: Divertimento, K. 334; K. 136/125a (Vienna Octet — Complete Decca Recordings Vol. 14)
album: Brahms: Clarinet Quintet, Op. 115: Baermann: Adagio for Clarinet and String Quintet (Vienna Octet — Complete Decca Recordings Vol. 15)
album: Schubert: Octet, D. 803 (Vienna Octet — Complete Decca Recordings Vol. 11)
album: Mozart: Piano Quintet, K. 452; Clarinet Trio, K. 498 "Kegelstatt" (Vienna Octet — Complete Decca Recordings Vol. 9)
album: Beethoven: Septet, Op. 20; Dvořák: String Quartet No. 10 (Vienna Octet — Complete Decca Recordings Vol. 7)
track: Octet in F Major, D. 803: IV. Thema. Andante - Var. I - VII
track: Clarinet Quintet in A Major, K. 581: II. Larghetto

CopyrightID
type: PropertyValue

CopyrightStatus
type: PropertyValue
value: registered

CopyrightRegisteredAt
type: PropertyValue
value: 2026-07-31T15:53:44+00:00

CopyrightChainExplorerURL
type: PropertyValue
value: https://explorer.copyrightchains.com/tx/0x83561f39ebc768029e6e56d250c5a0021895bf6f2af740d5a32a5a4af0dee25c

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 960429

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/960429

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077111402

OTSTimestamp
type: PropertyValue
value: 2026-07-31T16:07:24Z

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 0x83561f39ebc768029e6e56d250c5a0021895bf6f2af740d5a32a5a4af0dee25c. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077111402 — a six-check JSON result.
date published: 2026-07-31T16:07:24Z

String Sextet in A Major, Op. 48, B. 80: II. Dumka. Poco allegretto
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 118.241
additional property: Musical Key
  type: PropertyValue
  value: 10
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 5
additional property: Danceability
  type: PropertyValue
  value: 0.179
additional property: Energy
  type: PropertyValue
  value: 0.092
additional property: Speechiness
  type: PropertyValue
  value: 0.04
additional property: Acousticness
  type: PropertyValue
  value: 0.873
additional property: Instrumentalness
  type: PropertyValue
  value: 0.113
additional property: Liveness
  type: PropertyValue
  value: 0.123
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.179
additional property: Loudness (dB)
  type: PropertyValue
  value: -27.076
additional property: Key Name
  type: PropertyValue
  value: Bb
additional property: Mode Name
  type: PropertyValue
  value: Major

Mendelssohn: Octet / Beethoven: Septet
type: MusicAlbum
date published: 1973-01-01
track: Octet in E-Flat Major, Op. 20, MWV R20: I. Allegro moderato, ma con fuoco
  type: MusicRecording
  duration: PT14M26S
  duration ms: 866626
  explicit: false
  by artist: Felix Mendelssohn
  by artist: Wiener Oktett
  in album: Mendelssohn: Octet / Beethoven: Septet
    type: MusicAlbum
    date published: 1973-01-01
  genre: classical
  genre: early-romantic-era
  genre: german-romanticism
  genre: classical-piano
  genre: choral
  genre: chamber-music
  isrc code: GBF077210271
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-31T00:41:57+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xfe741381e1d10bb810981b7e3667b42cf746dd856d7a365cf373212319d38269
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960334
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960334
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077210271
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-31T02:19:15Z
  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 0xfe741381e1d10bb810981b7e3667b42cf746dd856d7a365cf373212319d38269. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077210271 — a six-check JSON result.
    date published: 2026-07-31T02:19:15Z
  audio: Octet in E-Flat Major, Op. 20, MWV R20: I. Allegro moderato, ma con fuoco
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 140.079
    additional property: Musical Key
      type: PropertyValue
      value: 3
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.289
    additional property: Energy
      type: PropertyValue
      value: 0.213
    additional property: Speechiness
      type: PropertyValue
      value: 0.035
    additional property: Acousticness
      type: PropertyValue
      value: 0.903
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.728
    additional property: Liveness
      type: PropertyValue
      value: 0.337
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.186
    additional property: Loudness (dB)
      type: PropertyValue
      value: -20.802
    additional property: Key Name
      type: PropertyValue
      value: Eb
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Octet in E-Flat Major, Op. 20, MWV R20: II. Andante
  type: MusicRecording
  duration: PT7M21S
  duration ms: 441000
  explicit: false
  by artist: Felix Mendelssohn
  by artist: Wiener Oktett
  in album: Mendelssohn: Octet / Beethoven: Septet
    type: MusicAlbum
    date published: 1973-01-01
  genre: classical
  genre: early-romantic-era
  genre: german-romanticism
  genre: classical-piano
  genre: choral
  genre: chamber-music
  isrc code: GBF077210272
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-31T21:48:14+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x65f5f9d40380110145353c08f07ea5b0ec336c712accabf1c031bcdab4662c4a
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960473
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960473
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077210272
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-31T22:27:44Z
  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 0x65f5f9d40380110145353c08f07ea5b0ec336c712accabf1c031bcdab4662c4a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077210272 — a six-check JSON result.
    date published: 2026-07-31T22:27:44Z
  audio: Octet in E-Flat Major, Op. 20, MWV R20: II. Andante
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 135.386
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.242
    additional property: Energy
      type: PropertyValue
      value: 0.067
    additional property: Speechiness
      type: PropertyValue
      value: 0.043
    additional property: Acousticness
      type: PropertyValue
      value: 0.959
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.705
    additional property: Liveness
      type: PropertyValue
      value: 0.139
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.068
    additional property: Loudness (dB)
      type: PropertyValue
      value: -27.573
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Octet in E-Flat Major, Op. 20, MWV R20: IV. Presto
  type: MusicRecording
  duration: PT6M32S
  duration ms: 392306
  explicit: false
  by artist: Felix Mendelssohn
  by artist: Wiener Oktett
  in album: Mendelssohn: Octet / Beethoven: Septet
    type: MusicAlbum
    date published: 1973-01-01
  genre: classical
  genre: early-romantic-era
  genre: german-romanticism
  genre: classical-piano
  genre: choral
  genre: chamber-music
  isrc code: GBF077210274
  additional property: CopyrightID
  additional property: CopyrightStatus
  additional property: CopyrightRegisteredAt
  additional property: CopyrightChainExplorerURL
  additional property: OTSHash
  additional property: OTSBitcoinBlock
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Octet in E-Flat Major, Op. 20, MWV R20: IV. Presto
track: Septet in E-Flat Major, Op. 20: I. Adagio - Allegro con brio

CopyrightID
type: PropertyValue

CopyrightStatus
type: PropertyValue
value: registered

CopyrightRegisteredAt
type: PropertyValue
value: 2026-07-07T17:58:51+00:00

CopyrightChainExplorerURL
type: PropertyValue
value: https://explorer.copyrightchains.com/tx/0xf1bed4eb35a3c2c4ba6465d4a9f52eb14834aa752edac27a7cf7ce7f73e7df01

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 957118

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/957118

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077210274

OTSTimestamp
type: PropertyValue
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 0xf1bed4eb35a3c2c4ba6465d4a9f52eb14834aa752edac27a7cf7ce7f73e7df01. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077210274 — a six-check JSON result.
date published: 2026-07-08T03:20:19Z

Octet in E-Flat Major, Op. 20, MWV R20: IV. Presto
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 140.897
additional property: Musical Key
  type: PropertyValue
  value: 3
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 5
additional property: Danceability
  type: PropertyValue
  value: 0.398
additional property: Energy
  type: PropertyValue
  value: 0.298
additional property: Speechiness
  type: PropertyValue
  value: 0.036
additional property: Acousticness
  type: PropertyValue
  value: 0.93
additional property: Instrumentalness
  type: PropertyValue
  value: 0.507
additional property: Liveness
  type: PropertyValue
  value: 0.096
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.479
additional property: Loudness (dB)
  type: PropertyValue
  value: -20.912
additional property: Key Name
  type: PropertyValue
  value: Eb
additional property: Mode Name
  type: PropertyValue
  value: Major

Septet in E-Flat Major, Op. 20: I. Adagio - Allegro con brio
type: MusicRecording
duration: PT10M32S
duration ms: 632360
explicit: false
by artist: Ludwig van Beethoven
by artist: Wiener Oktett
in album: Mendelssohn: Octet / Beethoven: Septet
  type: MusicAlbum
  date published: 1973-01-01
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: GBF075910101
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T21:37:38+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xee989a417c1fdbff35fec0c074f01ab823b6a8fc4b11b1fb352d5607903eb81a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960473
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960473
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF075910101
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T22:27:44Z
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 0xee989a417c1fdbff35fec0c074f01ab823b6a8fc4b11b1fb352d5607903eb81a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF075910101 — a six-check JSON result.
  date published: 2026-07-31T22:27:44Z
audio: Septet in E-Flat Major, Op. 20: I. Adagio - Allegro con brio
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 105.407
  additional property: Musical Key
    type: PropertyValue
    value: 3
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.341
  additional property: Energy
    type: PropertyValue
    value: 0.082
  additional property: Speechiness
    type: PropertyValue
    value: 0.045
  additional property: Acousticness
    type: PropertyValue
    value: 0.914
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.039
  additional property: Liveness
    type: PropertyValue
    value: 0.105
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.151
  additional property: Loudness (dB)
    type: PropertyValue
    value: -25.543
  additional property: Key Name
    type: PropertyValue
    value: Eb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Mendelssohn: Octet, Op. 20; Rimsky-Korsakov: Quintet (Vienna Octet — Complete Decca Recordings Vol. 27)
type: MusicAlbum
date published: 1973

Dvořák: String Sextet, Op. 48; String Quintet, Op. 97 (Vienna Octet — Complete Decca Recordings Vol. 25)
type: MusicAlbum
date published: 1972

Badings: Octet, Op. 67 (Vienna Octet — Complete Decca Recordings Vol. 26)
type: MusicAlbum
date published: 1972

Mendelssohn: Piano Sextet, Op. 110; Borodin: Piano Quintet (Vienna Octet — Complete Decca Recordings Vol. 21)
type: MusicAlbum
date published: 1970
track: Piano Sextet in D Major, Op. 110, MWV Q16: I. Allegro vivace
  type: MusicRecording
  duration: PT12M22S
  duration ms: 742106
  explicit: false
  by artist: Felix Mendelssohn
  by artist: Wiener Oktett
  in album: Mendelssohn: Piano Sextet, Op. 110; Borodin: Piano Quintet (Vienna Octet — Complete Decca Recordings Vol. 21)
    type: MusicAlbum
    date published: 1970
  genre: classical
  genre: early-romantic-era
  genre: german-romanticism
  genre: classical-piano
  genre: choral
  genre: chamber-music
  isrc code: GBF076812981
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-07T19:19:21+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x489e6d6dc468ad68b5a206297bc6398d0c7f4a531f4c67838fd78806a5dc5c69
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957120
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957120
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076812981
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T03:22:41Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → 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 0x489e6d6dc468ad68b5a206297bc6398d0c7f4a531f4c67838fd78806a5dc5c69. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076812981 — a six-check JSON result.
    date published: 2026-07-08T03:22:41Z
  audio: Piano Sextet in D Major, Op. 110, MWV Q16: I. Allegro vivace
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 100.685
    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: 0.218
    additional property: Energy
      type: PropertyValue
      value: 0.16
    additional property: Speechiness
      type: PropertyValue
      value: 0.04
    additional property: Acousticness
      type: PropertyValue
      value: 0.936
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.849
    additional property: Liveness
      type: PropertyValue
      value: 0.108
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.302
    additional property: Loudness (dB)
      type: PropertyValue
      value: -24.692
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Piano Quintet in C Minor: I. Andante
  type: MusicRecording
  duration: PT4M38S
  duration ms: 278256
  explicit: false
  by artist: Alexander Borodin
  by artist: Wiener Oktett
  in album: Mendelssohn: Piano Sextet, Op. 110; Borodin: Piano Quintet (Vienna Octet — Complete Decca Recordings Vol. 21)
    type: MusicAlbum
    date published: 1970
  genre: classical
  genre: late-romantic-era
  genre: early-modern-classical
  genre: russian-romanticism
  isrc code: GBF076812991
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-07T16:31:28+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xde19fc2b0e988e0237cc8bb1026653c409b80a3110b2cf80bd73c1b147fa991b
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957118
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957118
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076812991
  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 0xde19fc2b0e988e0237cc8bb1026653c409b80a3110b2cf80bd73c1b147fa991b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076812991 — a six-check JSON result.
    date published: 2026-07-08T03:20:19Z
  audio: Piano Quintet in C Minor: I. Andante
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 136.293
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.264
    additional property: Energy
      type: PropertyValue
      value: 0.095
    additional property: Speechiness
      type: PropertyValue
      value: 0.035
    additional property: Acousticness
      type: PropertyValue
      value: 0.956
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.411
    additional property: Liveness
      type: PropertyValue
      value: 0.068
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.172
    additional property: Loudness (dB)
      type: PropertyValue
      value: -22.838
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Piano Quintet in C Minor: II. Scherzo. Allegro non troppo
  type: MusicRecording
  duration: PT5M36S
  duration ms: 336860
  explicit: false
  by artist: Alexander Borodin
  by artist: Wiener Oktett
  in album: Mendelssohn: Piano Sextet, Op. 110; Borodin: Piano Quintet (Vienna Octet — Complete Decca Recordings Vol. 21)
    type: MusicAlbum
    date published: 1970
  genre: classical
  genre: late-romantic-era
  genre: early-modern-classical
  genre: russian-romanticism
  isrc code: GBF076812992
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
  additional property: CopyrightChainExplorerURL
  additional property: OTSHash
  additional property: OTSBitcoinBlock
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Piano Quintet in C Minor: II. Scherzo. Allegro non troppo

CopyrightRegisteredAt
type: PropertyValue
value: 2026-07-31T21:34:45+00:00

CopyrightChainExplorerURL
type: PropertyValue
value: https://explorer.copyrightchains.com/tx/0x1dfb587ca3c2934e65a5b2c28d30f1942316ea3b9f36fa92e3c11597305f4b63

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 960478

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/960478

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076812992

OTSTimestamp
type: PropertyValue
value: 2026-07-31T23:30:38Z

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 0x1dfb587ca3c2934e65a5b2c28d30f1942316ea3b9f36fa92e3c11597305f4b63. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076812992 — a six-check JSON result.
date published: 2026-07-31T23:30:38Z

Piano Quintet in C Minor: II. Scherzo. Allegro non troppo
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 141.817
additional property: Musical Key
  type: PropertyValue
  value: 0
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 5
additional property: Danceability
  type: PropertyValue
  value: 0.383
additional property: Energy
  type: PropertyValue
  value: 0.166
additional property: Speechiness
  type: PropertyValue
  value: 0.037
additional property: Acousticness
  type: PropertyValue
  value: 0.958
additional property: Instrumentalness
  type: PropertyValue
  value: 0.633
additional property: Liveness
  type: PropertyValue
  value: 0.099
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.302
additional property: Loudness (dB)
  type: PropertyValue
  value: -24.251
additional property: Key Name
  type: PropertyValue
  value: C
additional property: Mode Name
  type: PropertyValue
  value: Major

Kreutzer: Grand Septet; Berwald: Grand Septet (Vienna Octet — Complete Decca Recordings Vol. 22)
type: MusicAlbum
date published: 1970

Dvořák: String Quintet, Op. 77; Spohr: Quintet, Op. 52 (Vienna Octet — Complete Decca Recordings Vol. 23)
type: MusicAlbum
date published: 1970

Beethoven: Quintet, Op. 29; Sextet, Op. 81b (Vienna Octet — Complete Decca Recordings Vol. 24)
type: MusicAlbum
date published: 1970

Spohr: Nonet, Op. 31; Double Quartet, Op. 87 (Vienna Octet — Complete Decca Recordings Vol. 20)
type: MusicAlbum
date published: 1968

Mozart: Divertimento, K. 205; March, K. 290; Cassation, K. 99 (Vienna Octet — Complete Decca Recordings Vol. 18)
type: MusicAlbum
date published: 1965

Britten: Sinfonietta, Op. 1; Hindemith: Octet (Vienna Octet — Complete Decca Recordings Vol. 19)
type: MusicAlbum
date published: 1965

Mozart: Divertimento, K. 287; M. Haydn: Divertimento (Vienna Octet — Complete Decca Recordings Vol. 16)
type: MusicAlbum
date published: 1964
track: Divertimento No. 15 in B-Flat Major, K. 287: III. Menuetto
  type: MusicRecording
  duration: PT3M39S
  duration ms: 219711
  explicit: false
  by artist: Wolfgang Amadeus Mozart
  by artist: Wiener Oktett
  in album: Mozart: Divertimento, K. 287; M. Haydn: Divertimento (Vienna Octet — Complete Decca Recordings Vol. 16)
    type: MusicAlbum
    date published: 1964
  genre: classical
  genre: classical-era
  genre: classical-piano
  genre: opera
  genre: chamber-music
  genre: concerto
  isrc code: GBF076212393
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-08-01T00:02:26+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xd56bd112cf88ca4865cc34be043106ac54fc3831018fd02612e151e324cd1f86
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960487
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960487
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076212393
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-08-01T00:15:43Z
  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 0xd56bd112cf88ca4865cc34be043106ac54fc3831018fd02612e151e324cd1f86. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076212393 — a six-check JSON result.
    date published: 2026-08-01T00:15:43Z
  audio: Divertimento No. 15 in B-Flat Major, K. 287: III. Menuetto
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 141.88
    additional property: Musical Key
      type: PropertyValue
      value: 10
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.384
    additional property: Energy
      type: PropertyValue
      value: 0.052
    additional property: Speechiness
      type: PropertyValue
      value: 0.041
    additional property: Acousticness
      type: PropertyValue
      value: 0.957
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.012
    additional property: Liveness
      type: PropertyValue
      value: 0.1
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.192
    additional property: Loudness (dB)
      type: PropertyValue
      value: -24.014
    additional property: Key Name
      type: PropertyValue
      value: Bb
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Divertimento No. 15 in B-Flat Major, K. 287: V. Menuetto
  type: MusicRecording
  duration: PT4M4S
  duration ms: 244405
  explicit: false
  by artist: Wolfgang Amadeus Mozart
  by artist: Wiener Oktett
  in album: Mozart: Divertimento, K. 287; M. Haydn: Divertimento (Vienna Octet — Complete Decca Recordings Vol. 16)
    type: MusicAlbum
    date published: 1964
  genre: classical
  genre: classical-era
  genre: classical-piano
  genre: opera
  genre: chamber-music
  genre: concerto
  isrc code: GBF076212395
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-07T10:04:01+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x833379569058b7129f261d245accd10e63e2608d3bf755d5115f72e6ca48d3db
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957118
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957118
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076212395
  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 0x833379569058b7129f261d245accd10e63e2608d3bf755d5115f72e6ca48d3db. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076212395 — a six-check JSON result.
    date published: 2026-07-08T03:20:19Z
  audio: Divertimento No. 15 in B-Flat Major, K. 287: V. Menuetto
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 141.078
    additional property: Musical Key
      type: PropertyValue
      value: 10
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.435
    additional property: Energy
      type: PropertyValue
      value: 0.065
    additional property: Speechiness
      type: PropertyValue
      value: 0.052
    additional property: Acousticness
      type: PropertyValue
      value: 0.959
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.154
    additional property: Liveness
      type: PropertyValue
      value: 0.175
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.274
    additional property: Loudness (dB)
      type: PropertyValue
      value: -24.188
    additional property: Key Name
      type: PropertyValue
      value: Bb
    additional property: Mode Name
      type: PropertyValue
      value: Major

Mozart: Clarinet Quintet, K. 581; Divertimento, K. 247 (Vienna Octet — Complete Decca Recordings Vol. 17)
type: MusicAlbum
date published: 1964
track: Clarinet Quintet in A Major, K. 581: II. Larghetto
  type: MusicRecording
  duration: PT6M25S
  duration ms: 385906
  explicit: false
  by artist: Wolfgang Amadeus Mozart
  by artist: Alfred Boskovsky
  by artist: Wiener Oktett
  in album: Mozart: Clarinet Quintet, K. 581; Divertimento, K. 247 (Vienna Octet — Complete Decca Recordings Vol. 17)
    type: MusicAlbum
    date published: 1964
  genre: classical
  genre: classical-era
  genre: classical-piano
  genre: opera
  genre: chamber-music
  genre: concerto
  isrc code: GBF076310222
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-31T05:11:38+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x6911a85a8512b7a9060a5bbc6d64f4500126a553e11da00a1d1667e16d54d421
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960348
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960348
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076310222
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-31T05:17:02Z
  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 0x6911a85a8512b7a9060a5bbc6d64f4500126a553e11da00a1d1667e16d54d421. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076310222 — a six-check JSON result.
    date published: 2026-07-31T05:17:02Z
  audio: Clarinet Quintet in A Major, K. 581: II. Larghetto
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 141.533
    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: 0.157
    additional property: Energy
      type: PropertyValue
      value: 0.02
    additional property: Speechiness
      type: PropertyValue
      value: 0.043
    additional property: Acousticness
      type: PropertyValue
      value: 0.976
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.917
    additional property: Liveness
      type: PropertyValue
      value: 0.098
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.052
    additional property: Loudness (dB)
      type: PropertyValue
      value: -30.465
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Clarinet Quintet in A Major, K. 581: IV. Allegretto con variazioni
  type: MusicRecording
  duration: PT9M27S
  duration ms: 567433
  explicit: false
  by artist: Wolfgang Amadeus Mozart
  by artist: Alfred Boskovsky
  by artist: Wiener Oktett
  in album: Mozart: Clarinet Quintet, K. 581; Divertimento, K. 247 (Vienna Octet — Complete Decca Recordings Vol. 17)
    type: MusicAlbum
    date published: 1964
  genre: classical
  genre: classical-era
  genre: classical-piano
  genre: opera
  genre: chamber-music
  genre: concerto
  isrc code: GBF076310224
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x05bc9bcddd7498b5c7b049e5c2df274fa53b11f7ec1d6ffe3353447f5ced96cd
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960500
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960500
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076310224
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-08-01T03:13:03Z
  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 0x05bc9bcddd7498b5c7b049e5c2df274fa53b11f7ec1d6ffe3353447f5ced96cd. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076310224 — a six-check JSON result.
    date published: 2026-08-01T03:13:03Z
  audio: Clarinet Quintet in A Major, K. 581: IV. Allegretto con variazioni
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 144.684
    additional property: Musical Key
      type: PropertyValue
      value: 9
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.325
    additional property: Energy
      type: PropertyValue
      value: 0.033
    additional property: Speechiness
      type: PropertyValue
      value: 0.042
    additional property: Acousticness
      type: PropertyValue
      value: 0.979
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.376
    additional property: Liveness
      type: PropertyValue
      value: 0.066
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.318
    additional property: Loudness (dB)
      type: PropertyValue
      value: -28.344
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Major

Mozart: Divertissements, K. 334 & K. 136 (Stereo Version)
type: MusicAlbum
date published: 1962-01-01

Mozart: Divertimentos, K. 136 & 334 (Mono Version)
type: MusicAlbum
date published: 1962-01-01

Mozart: Divertimento, K. 334; K. 136/125a (Vienna Octet — Complete Decca Recordings Vol. 14)
type: MusicAlbum
date published: 1962
track: Divertimento in D Major, K. 334: IV. Adagio
  type: MusicRecording
  duration: PT6M3S
  duration ms: 363706
  explicit: false
  by artist: Wolfgang Amadeus Mozart
  by artist: Wiener Oktett
  in album: Mozart: Divertimento, K. 334; K. 136/125a (Vienna Octet — Complete Decca Recordings Vol. 14)
    type: MusicAlbum
    date published: 1962
  genre: classical
  genre: classical-era
  genre: classical-piano
  genre: opera
  genre: chamber-music
  genre: concerto
  isrc code: GBF076110544
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-29T10:29:45+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xed0dbfd955d1253f04cb7cf737460d697865502dfca60aed42d09261b2c6a642
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960095
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960095
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076110544
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-29T11:07:37Z
  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 0xed0dbfd955d1253f04cb7cf737460d697865502dfca60aed42d09261b2c6a642. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076110544 — a six-check JSON result.
    date published: 2026-07-29T11:07:37Z
  audio: Divertimento in D Major, K. 334: IV. Adagio
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 126.159
    additional property: Musical Key
      type: PropertyValue
      value: 9
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.235
    additional property: Energy
      type: PropertyValue
      value: 0.19
    additional property: Speechiness
      type: PropertyValue
      value: 0.061
    additional property: Acousticness
      type: PropertyValue
      value: 0.836
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.005
    additional property: Liveness
      type: PropertyValue
      value: 0.149
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.12
    additional property: Loudness (dB)
      type: PropertyValue
      value: -26.132
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Major

Brahms: Clarinet Quintet, Op. 115: Baermann: Adagio for Clarinet and String Quintet (Vienna Octet — Complete Decca Recordings Vol. 15)
type: MusicAlbum
date published: 1962

Schubert: Octet, D. 803 (Vienna Octet — Complete Decca Recordings Vol. 11)
type: MusicAlbum
date published: 1958

Mozart: Piano Quintet, K. 452; Clarinet Trio, K. 498 "Kegelstatt" (Vienna Octet — Complete Decca Recordings Vol. 9)
type: MusicAlbum
date published: 1957

Beethoven: Septet, Op. 20; Dvořák: String Quartet No. 10 (Vienna Octet — Complete Decca Recordings Vol. 7)
type: MusicAlbum
date published: 1956

Octet in F Major, D. 803: IV. Thema. Andante - Var. I - VII
type: MusicRecording
duration: PT11M23S
duration ms: 683000
explicit: false
by artist: Franz Schubert
by artist: Wiener Oktett
in album: Wiener Kaffeehaus
  type: MusicAlbum
  date published: 2020-04-17
popularity: 1
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: GBF075710064
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T19:28:12+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x410236344dd67d278880fda12ddc4949465e13f4143f7835412e3f033d9edbe2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957120
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957120
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF075710064
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:22:41Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → 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 0x410236344dd67d278880fda12ddc4949465e13f4143f7835412e3f033d9edbe2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF075710064 — a six-check JSON result.
  date published: 2026-07-08T03:22:41Z
audio: Octet in F Major, D. 803: IV. Thema. Andante - Var. I - VII
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 133.41
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.343
  additional property: Energy
    type: PropertyValue
    value: 0.06
  additional property: Speechiness
    type: PropertyValue
    value: 0.045
  additional property: Acousticness
    type: PropertyValue
    value: 0.949
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.12
  additional property: Liveness
    type: PropertyValue
    value: 0.066
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.22
  additional property: Loudness (dB)
    type: PropertyValue
    value: -27.78
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major

Clarinet Quintet in A Major, K. 581: II. Larghetto
type: MusicRecording
duration: PT6M49S
duration ms: 409133
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Wiener Oktett
in album: Essential Mozart
  type: MusicAlbum
  date published: 2001-01-01
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: GBF078911982
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-06T07:15:42+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6acbf82ef6b392308fc2cff3bef75a8c8d6b596ff581d38a9f25c0b34ba1d936
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957039
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957039
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078911982
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-07T12:58:18Z
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 0x6acbf82ef6b392308fc2cff3bef75a8c8d6b596ff581d38a9f25c0b34ba1d936. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078911982 — a six-check JSON result.
  date published: 2026-07-07T12:58:18Z
audio: Clarinet Quintet in A Major, K. 581: II. Larghetto
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 106.552
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 6
  additional property: Danceability
    type: PropertyValue
    value: 0.083
  additional property: Energy
    type: PropertyValue
    value: 0.006
  additional property: Speechiness
    type: PropertyValue
    value: 0.048
  additional property: Acousticness
    type: PropertyValue
    value: 0.981
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.432
  additional property: Liveness
    type: PropertyValue
    value: 0.057
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.044
  additional property: Loudness (dB)
    type: PropertyValue
    value: -32.826
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major