Duncan Marquiss
type: MusicGroup
popularity: 4
followers: 617
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd81bb3f15e684999e04d26e9c89b0a15c557f1cd94fff99eebaa2f613bd2b90e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953949
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953949
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/19c3d6e4-e50e-47ab-8cf8-1459159dc4fb.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/19c3d6e4-e50e-47ab-8cf8-1459159dc4fb.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/19c3d6e4-e50e-47ab-8cf8-1459159dc4fb
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T13:28:01Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd81bb3f15e684999e04d26e9c89b0a15c557f1cd94fff99eebaa2f613bd2b90e","name":"Duncan Marquiss","registered_at":"2026-06-15T22:24:45Z","symbol":"NIM0850619","token_address":"0x25688f47eef6e521946a0ede53cc3c32888cc996","type":"artist","uuid":"19c3d6e4-e50e-47ab-8cf8-1459159dc4fb"}
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 0xd81bb3f15e684999e04d26e9c89b0a15c557f1cd94fff99eebaa2f613bd2b90e. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19c3d6e4-e50e-47ab-8cf8-1459159dc4fb.json and https://artists.proofprofile.net/proofs/artist/19c3d6e4-e50e-47ab-8cf8-1459159dc4fb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T13:28:01Z
  text: {"copyright_id":"0xd81bb3f15e684999e04d26e9c89b0a15c557f1cd94fff99eebaa2f613bd2b90e","name":"Duncan Marquiss","registered_at":"2026-06-15T22:24:45Z","symbol":"NIM0850619","token_address":"0x25688f47eef6e521946a0ede53cc3c32888cc996","type":"artist","uuid":"19c3d6e4-e50e-47ab-8cf8-1459159dc4fb"}
album: Drivenhalle
  type: MusicAlbum
  date published: 2021-12-02
album: Minor History
  type: MusicAlbum
  date published: 2022-02-02
album: Wires Turned Sideways In Time
  type: MusicAlbum
  date published: 2022-03-04
  track: Murmer Double
    type: MusicRecording
    duration: PT5M43S
    duration ms: 343586
    explicit: false
    by artist: Duncan Marquiss
    in album: Wires Turned Sideways In Time
      type: MusicAlbum
      date published: 2022-03-04
    isrc code: UKWS62000005
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T21:49:18+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x493cf8bd8fa7e330bcf9abfdc244182d97da87599ea62c866c22cc215013b267
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956728
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956728
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKWS62000005
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T01:43:49Z
    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 0x493cf8bd8fa7e330bcf9abfdc244182d97da87599ea62c866c22cc215013b267. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/UKWS62000005.
      date published: 2026-07-05T01:43:49Z
    audio: Murmer Double
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 108.105
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.505
      additional property: Energy
        type: PropertyValue
        value: 0.312
      additional property: Speechiness
        type: PropertyValue
        value: 0.033
      additional property: Acousticness
        type: PropertyValue
        value: 0.319
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.844
      additional property: Liveness
        type: PropertyValue
        value: 0.112
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.191
      additional property: Loudness (dB)
        type: PropertyValue
        value: -14.15
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Major