Joseph Holbrooke
type: MusicGroup
description: thumb|180px|Joseph Holbrooke by E.O. Hoppé, 1913 Joseph Charles Holbrooke, sometimes given as Josef Holbrooke, (5 July 18785 August 1958) was an English composer, conductor, and pianist. Life Early
popularity: 7
followers: 552
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xbfa994f3da8ac4f18be62799decf88ef19440cd88df7c5ff61efea070e17a366
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954705
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954705
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ed4fff8c-834d-4b2a-8c96-5e60c5000ad5.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ed4fff8c-834d-4b2a-8c96-5e60c5000ad5.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ed4fff8c-834d-4b2a-8c96-5e60c5000ad5
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T13:42:37Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xbfa994f3da8ac4f18be62799decf88ef19440cd88df7c5ff61efea070e17a366","name":"Joseph Holbrooke","registered_at":"2026-06-21T11:33:57Z","symbol":"NIM1913318","token_address":"0xafd5112daadfa12f85ff536a990c5b4491471e7d","type":"artist","uuid":"ed4fff8c-834d-4b2a-8c96-5e60c5000ad5"}
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 0xbfa994f3da8ac4f18be62799decf88ef19440cd88df7c5ff61efea070e17a366. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed4fff8c-834d-4b2a-8c96-5e60c5000ad5.json and https://artists.proofprofile.net/proofs/artist/ed4fff8c-834d-4b2a-8c96-5e60c5000ad5.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-21T13:42:37Z
  text: {"copyright_id":"0xbfa994f3da8ac4f18be62799decf88ef19440cd88df7c5ff61efea070e17a366","name":"Joseph Holbrooke","registered_at":"2026-06-21T11:33:57Z","symbol":"NIM1913318","token_address":"0xafd5112daadfa12f85ff536a990c5b4491471e7d","type":"artist","uuid":"ed4fff8c-834d-4b2a-8c96-5e60c5000ad5"}
album: Homage to Godowsky: Piano Works Dedicated to Leopold Godowsky
  type: MusicAlbum
  date published: 2020-03-27
  track: Charakterskizzen, Op. 40: I. Vision
    type: MusicRecording
    duration: PT5M26S
    duration ms: 326093
    explicit: false
    by artist: Josef Hofmann
    by artist: Andrey Gugnin
    in album: Homage to Godowsky: Piano Works Dedicated to Leopold Godowsky
      type: MusicAlbum
      date published: 2020-03-27
    popularity: 1
    isrc code: GBAJY2031001
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-31T14:52:35+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x664a4c625e5104a53feae1884f1bbeb71974e1e3bf5e267e4cb67bd3a6e64b5a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 960418
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/960418
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY2031001
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-31T15:20:15Z
    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 0x664a4c625e5104a53feae1884f1bbeb71974e1e3bf5e267e4cb67bd3a6e64b5a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY2031001 — a six-check JSON result.
      date published: 2026-07-31T15:20:15Z
    audio: Charakterskizzen, Op. 40: I. Vision
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 93.685
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 5
      additional property: Danceability
        type: PropertyValue
        value: 0.311
      additional property: Energy
        type: PropertyValue
        value: 0.108
      additional property: Speechiness
        type: PropertyValue
        value: 0.04
      additional property: Acousticness
        type: PropertyValue
        value: 0.989
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.89
      additional property: Liveness
        type: PropertyValue
        value: 0.067
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.039
      additional property: Loudness (dB)
        type: PropertyValue
        value: -25.433
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Minor
  track: Melodia appassionata in E Minor, Op. 81 No. 6
    type: MusicRecording
    duration: PT4M18S
    duration ms: 258600
    explicit: false
    by artist: Moritz Moszkowski
    by artist: Andrey Gugnin
    in album: Homage to Godowsky: Piano Works Dedicated to Leopold Godowsky
      type: MusicAlbum
      date published: 2020-03-27
    popularity: 4
    genre: german-romanticism
    genre: late-romantic-era
    genre: polish-classical
    isrc code: GBAJY2031020
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-30T23:51:58+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xfcdc74d4dc2f8fdacc99a711d55de36e3f827166a5a2a1bc0a5f5208973575a9
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 960330
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/960330
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY2031020
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-31T00:58:21Z
    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdc74d4dc2f8fdacc99a711d55de36e3f827166a5a2a1bc0a5f5208973575a9. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY2031020 — a six-check JSON result.
      date published: 2026-07-31T00:58:21Z
    audio: Melodia appassionata in E Minor, Op. 81 No. 6
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 115.832
      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: 0.219
      additional property: Energy
        type: PropertyValue
        value: 0.104
      additional property: Speechiness
        type: PropertyValue
        value: 0.033
      additional property: Acousticness
        type: PropertyValue
        value: 0.992
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.873
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name

Liveness
type: PropertyValue
value: 0.077

Valence (Positivity)
type: PropertyValue
value: 0.074

Loudness (dB)
type: PropertyValue
value: -26.808

Key Name
type: PropertyValue
value: C

Mode Name
type: PropertyValue
value: Major