Carl Matthews
type: MusicGroup
genre: krautrock
genre: soul jazz
popularity: 2
followers: 380
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x62d753b8ce33b17b09774bcaaa8947a839875ef2decaf1794edbacd552e15f95
additional property: OTSHash
additional property: OTSBitcoinBlock
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  value: 953982
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953982
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2d2203cd-9140-44b5-ad86-bb023cb72133.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2d2203cd-9140-44b5-ad86-bb023cb72133.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2d2203cd-9140-44b5-ad86-bb023cb72133
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T17:42:23Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x62d753b8ce33b17b09774bcaaa8947a839875ef2decaf1794edbacd552e15f95","name":"Carl Matthews","registered_at":"2026-06-16T05:14:04Z","symbol":"NIM0948385","token_address":"0x54d7eea259b29d59bab104db8f70f5bbbda6298b","type":"artist","uuid":"2d2203cd-9140-44b5-ad86-bb023cb72133"}
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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d753b8ce33b17b09774bcaaa8947a839875ef2decaf1794edbacd552e15f95. Chain 2 (Bitcoin): anchored in block 953982 (2026-06-16T17:42:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d2203cd-9140-44b5-ad86-bb023cb72133.json and https://artists.proofprofile.net/proofs/artist/2d2203cd-9140-44b5-ad86-bb023cb72133.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T17:42:23Z
  text: {"copyright_id":"0x62d753b8ce33b17b09774bcaaa8947a839875ef2decaf1794edbacd552e15f95","name":"Carl Matthews","registered_at":"2026-06-16T05:14:04Z","symbol":"NIM0948385","token_address":"0x54d7eea259b29d59bab104db8f70f5bbbda6298b","type":"artist","uuid":"2d2203cd-9140-44b5-ad86-bb023cb72133"}
album: Call for World Saviours
  type: MusicAlbum
  date published: 2018-12-14
album: Col
  type: MusicAlbum
  date published: 2020-11-06
album: Places of Beauty
  type: MusicAlbum
  date published: 2022-04-16
track: As Above, So Below
  type: MusicRecording
  duration: PT4M56S
  duration ms: 296280
  explicit: false
  by artist: Carl Matthews
  in album: Soul Jazz Records Presents Space, Energy & Light: Experimental Electronic and Acoustic Soundscapes 1961-88
    type: MusicAlbum
    date published: 2017-06-30
  isrc code: GBBCK1701190
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-30T06:39:34+00:00
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    value: https://explorer.copyrightchains.com/tx/0x67e6cc483c6a6eb3d7521d9a5d6335cdd316d19545a2087a2d8e917990b884a4
  additional property: OTSHash
  additional property: OTSBitcoinBlock
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  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960220
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBCK1701190
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-30T07:28:30Z
  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 0x67e6cc483c6a6eb3d7521d9a5d6335cdd316d19545a2087a2d8e917990b884a4. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBBCK1701190.
    date published: 2026-07-30T07:28:30Z
  audio: As Above, So Below
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 172.169
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 6
    additional property: Danceability
      type: PropertyValue
      value: 0.069
    additional property: Energy
      type: PropertyValue
      value: 0.308
    additional property: Speechiness
      type: PropertyValue
      value: 0.044
    additional property: Acousticness
      type: PropertyValue
      value: 0.225
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.938
    additional property: Liveness
      type: PropertyValue
      value: 0.117
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.022
    additional property: Loudness (dB)
      type: PropertyValue
      value: -14.144
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Major