Mark Gradt
type: MusicGroup
popularity: 9
followers: 376
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x876e9aa8d5f46efbb72a09c1042d572c1a584c3f551008baa3e5b22fdb79266b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/82d4fe4a-6923-4584-8a55-cf30ff1b3ed8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/82d4fe4a-6923-4584-8a55-cf30ff1b3ed8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/82d4fe4a-6923-4584-8a55-cf30ff1b3ed8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x876e9aa8d5f46efbb72a09c1042d572c1a584c3f551008baa3e5b22fdb79266b","name":"Mark Gradt","registered_at":"2026-06-17T11:11:05Z","symbol":"NIM1377127","token_address":"0xcfbf8eb8e45da48a673a75cab7162cae838dbc24","type":"artist","uuid":"82d4fe4a-6923-4584-8a55-cf30ff1b3ed8"}
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 0x876e9aa8d5f46efbb72a09c1042d572c1a584c3f551008baa3e5b22fdb79266b. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82d4fe4a-6923-4584-8a55-cf30ff1b3ed8.json and https://artists.proofprofile.net/proofs/artist/82d4fe4a-6923-4584-8a55-cf30ff1b3ed8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0x876e9aa8d5f46efbb72a09c1042d572c1a584c3f551008baa3e5b22fdb79266b","name":"Mark Gradt","registered_at":"2026-06-17T11:11:05Z","symbol":"NIM1377127","token_address":"0xcfbf8eb8e45da48a673a75cab7162cae838dbc24","type":"artist","uuid":"82d4fe4a-6923-4584-8a55-cf30ff1b3ed8"}
album: Something About a Truck
  type: MusicAlbum
  date published: 2012-03-20
album: I Gotta Go
  type: MusicAlbum
  date published: 2012-05-31
album: Letting the Night Roll
  type: MusicAlbum
  date published: 2014-02-17
album: Close Your Eyes for This
  type: MusicAlbum
  date published: 2014-12-12
  track: Close Your Eyes for This
    type: MusicRecording
    duration: PT3M34S
    duration ms: 214644
    explicit: false
    by artist: Mark Gradt
    in album: Close Your Eyes for This
      type: MusicAlbum
      date published: 2014-12-12
    isrc code: TCACC1459896
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T04:57:58+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x12b94f386da9cea62741537a50eabbda075139d58840e7d7d69947a3fd7fec4e
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958828
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958828
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACC1459896
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T08:00:29Z
    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 0x12b94f386da9cea62741537a50eabbda075139d58840e7d7d69947a3fd7fec4e. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:00:29Z), 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/TCACC1459896.
      date published: 2026-07-20T08:00:29Z
    audio: Close Your Eyes for This
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 143.979
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.585
      additional property: Energy
        type: PropertyValue
        value: 0.752
      additional property: Speechiness
        type: PropertyValue
        value: 0.027
      additional property: Acousticness
        type: PropertyValue
        value: 0.012
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.135
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.711
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.264
      additional property: Key Name
        type: PropertyValue
        value: B
      additional property: Mode Name
        type: PropertyValue
        value: Major