Matthew Holden
type: MusicGroup
description: Matthew Holden Jr. (September 12, 1931 – January 26, 2025) was an American political scientist. Life and career Holden was born in Mound Bayou, Mississippi on September 12, 1931. He attended public s
popularity: 4
followers: 60
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf8a123f028cf4e7c9b1583d4bb11ab77d13170b73aa4319aeaa406e96be54bab
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954784
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954784
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f9e97767-037c-4b9d-8b05-1dc180a4c06e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f9e97767-037c-4b9d-8b05-1dc180a4c06e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f9e97767-037c-4b9d-8b05-1dc180a4c06e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-22T02:53:59Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf8a123f028cf4e7c9b1583d4bb11ab77d13170b73aa4319aeaa406e96be54bab","name":"Matthew Holden","registered_at":"2026-06-21T16:48:25Z","symbol":"NIM1977024","token_address":"0xa52daf723a29ea00e1c7e08c874c521342c7ae4c","type":"artist","uuid":"f9e97767-037c-4b9d-8b05-1dc180a4c06e"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a123f028cf4e7c9b1583d4bb11ab77d13170b73aa4319aeaa406e96be54bab. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9e97767-037c-4b9d-8b05-1dc180a4c06e.json and https://artists.proofprofile.net/proofs/artist/f9e97767-037c-4b9d-8b05-1dc180a4c06e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-22T02:53:59Z
  text: {"copyright_id":"0xf8a123f028cf4e7c9b1583d4bb11ab77d13170b73aa4319aeaa406e96be54bab","name":"Matthew Holden","registered_at":"2026-06-21T16:48:25Z","symbol":"NIM1977024","token_address":"0xa52daf723a29ea00e1c7e08c874c521342c7ae4c","type":"artist","uuid":"f9e97767-037c-4b9d-8b05-1dc180a4c06e"}
album: The Truth (Remixes)
  type: MusicAlbum
  date published: 2025-09-26
  track: The Truth - Radio Edit
    type: MusicRecording
    duration: PT3M37S
    duration ms: 217619
    explicit: false
    by artist: Matthew Holden
    in album: The Truth (Remixes)
      type: MusicAlbum
      date published: 2025-09-26
    isrc code: GXHND2513078
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T13:38:19+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xa82c6c86ef1f18f5c56dd7c511eefe06175a807986caad8cea7b9f30dc2b0f9d
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956551
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956551
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GXHND2513078
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T21:18:05Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82c6c86ef1f18f5c56dd7c511eefe06175a807986caad8cea7b9f30dc2b0f9d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GXHND2513078.
      date published: 2026-07-03T21:18:05Z
    audio: The Truth - Radio Edit
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 126.011
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.633
      additional property: Energy
        type: PropertyValue
        value: 0.893
      additional property: Speechiness
        type: PropertyValue
        value: 0.047
      additional property: Acousticness
        type: PropertyValue
        value: 0.192
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.474
      additional property: Liveness
        type: PropertyValue
        value: 0.087
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.038
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.297
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Minor