Mattyj Lennard
type: MusicGroup
popularity: 5
followers: 34
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf91c881ddd063fe3cedefc75404affedd2ded9382af44dad7b71eb0dbbb10fd0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954050
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954050
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/42a26c48-a6fd-42c1-a0df-88054a6bde6c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/42a26c48-a6fd-42c1-a0df-88054a6bde6c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/42a26c48-a6fd-42c1-a0df-88054a6bde6c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T05:14:33Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf91c881ddd063fe3cedefc75404affedd2ded9382af44dad7b71eb0dbbb10fd0","name":"Mattyj Lennard","registered_at":"2026-06-16T12:48:19Z","symbol":"NIM1056800","token_address":"0x4ead2bab2942cfc06a700f0a5646bb3cee2910ac","type":"artist","uuid":"42a26c48-a6fd-42c1-a0df-88054a6bde6c"}
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 0xf91c881ddd063fe3cedefc75404affedd2ded9382af44dad7b71eb0dbbb10fd0. Chain 2 (Bitcoin): anchored in block 954050 (2026-06-17T05:14:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42a26c48-a6fd-42c1-a0df-88054a6bde6c.json and https://artists.proofprofile.net/proofs/artist/42a26c48-a6fd-42c1-a0df-88054a6bde6c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T05:14:33Z
  text: {"copyright_id":"0xf91c881ddd063fe3cedefc75404affedd2ded9382af44dad7b71eb0dbbb10fd0","name":"Mattyj Lennard","registered_at":"2026-06-16T12:48:19Z","symbol":"NIM1056800","token_address":"0x4ead2bab2942cfc06a700f0a5646bb3cee2910ac","type":"artist","uuid":"42a26c48-a6fd-42c1-a0df-88054a6bde6c"}
album: Ngura
  type: MusicAlbum
  date published: 2025-07-11
  track: Ngura
    type: MusicRecording
    duration: PT3M1S
    duration ms: 181512
    explicit: false
    by artist: Mattyj Lennard
    in album: Ngura
      type: MusicAlbum
      date published: 2025-07-11
    isrc code: AUGBT2505579
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-15T06:20:27+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x5ddfc23be7e102152ac9f1b00a3248adf500788f1db7f1056b61705ba3346c4c
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958111
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958111
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUGBT2505579
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T06:58:20Z
    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 0x5ddfc23be7e102152ac9f1b00a3248adf500788f1db7f1056b61705ba3346c4c. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/AUGBT2505579.
      date published: 2026-07-15T06:58:20Z
    audio: Ngura
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 81.97
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.557
      additional property: Energy
        type: PropertyValue
        value: 0.125
      additional property: Speechiness
        type: PropertyValue
        value: 0.028
      additional property: Acousticness
        type: PropertyValue
        value: 0.691
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.007
      additional property: Liveness
        type: PropertyValue
        value: 0.094
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.078
      additional property: Loudness (dB)
        type: PropertyValue
        value: -19.991
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Major