Marcus L
type: MusicGroup
popularity: 6
followers: 836
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdc1138a8ed2b7e0694dedcb8e19626aaa845fced741ed0b74a370c1e75383210
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954728
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954728
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f813c1cb-1f5f-4af3-8328-5b706f58c55f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f813c1cb-1f5f-4af3-8328-5b706f58c55f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f813c1cb-1f5f-4af3-8328-5b706f58c55f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T18:08:38Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xdc1138a8ed2b7e0694dedcb8e19626aaa845fced741ed0b74a370c1e75383210","name":"Marcus L","registered_at":"2026-06-21T16:02:51Z","symbol":"NIM1967077","token_address":"0xdd1d363ae2ac55ba233ed138d631feca8eb5c6ef","type":"artist","uuid":"f813c1cb-1f5f-4af3-8328-5b706f58c55f"}
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 0xdc1138a8ed2b7e0694dedcb8e19626aaa845fced741ed0b74a370c1e75383210. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f813c1cb-1f5f-4af3-8328-5b706f58c55f.json and https://artists.proofprofile.net/proofs/artist/f813c1cb-1f5f-4af3-8328-5b706f58c55f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T18:08:38Z
  text: {"copyright_id":"0xdc1138a8ed2b7e0694dedcb8e19626aaa845fced741ed0b74a370c1e75383210","name":"Marcus L","registered_at":"2026-06-21T16:02:51Z","symbol":"NIM1967077","token_address":"0xdd1d363ae2ac55ba233ed138d631feca8eb5c6ef","type":"artist","uuid":"f813c1cb-1f5f-4af3-8328-5b706f58c55f"}
album: Telstar
  type: MusicAlbum
  date published: 2018-03-02
  track: Telstar
    type: MusicRecording
    duration: PT6M46S
    duration ms: 406371
    explicit: false
    by artist: Marcus L
    in album: Telstar
      type: MusicAlbum
      date published: 2018-03-02
    isrc code: GBKQU1800963
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-15T18:56:03+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x74edab1231ed3949defe2aa72403c4bcb4729a38c82850a03b0d8e043461da08
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958194
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958194
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU1800963
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T20:32:27Z
    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 0x74edab1231ed3949defe2aa72403c4bcb4729a38c82850a03b0d8e043461da08. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBKQU1800963.
      date published: 2026-07-15T20:32:27Z
    audio: Telstar
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 125.993
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.722
      additional property: Energy
        type: PropertyValue
        value: 0.949
      additional property: Speechiness
        type: PropertyValue
        value: 0.052
      additional property: Acousticness
        type: PropertyValue
        value: 0
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.915
      additional property: Liveness
        type: PropertyValue
        value: 0.055
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.444
      additional property: Loudness (dB)
        type: PropertyValue
        value: -8.059
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: 292513 = STORM
  type: MusicAlbum
  date published: 2019-04-24
album: Kimchi Slap
  type: MusicAlbum
  date published: 2020-09-18
album: K-Force
  type: MusicAlbum
  date published: 2021-03-04
album: While you are drinking
  type: MusicAlbum
  date published: 2024-03-20
album: PROTOCYBERPUNK
  type: MusicAlbum
  date published: 2024-08-21