letter4
type: MusicGroup
popularity: 5
followers: 68
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd124baafe7a5c353ae125f1eae1f4cb76d2b3cf05197132614f2b8e69b935ed3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953909
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953909
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/17993a21-bd2e-4afc-82fe-6ab5e91926f7.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/17993a21-bd2e-4afc-82fe-6ab5e91926f7.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/17993a21-bd2e-4afc-82fe-6ab5e91926f7
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T07:53:13Z
additional property: OTSCanonicalRecord
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 0xd124baafe7a5c353ae125f1eae1f4cb76d2b3cf05197132614f2b8e69b935ed3. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17993a21-bd2e-4afc-82fe-6ab5e91926f7.json and https://artists.proofprofile.net/proofs/artist/17993a21-bd2e-4afc-82fe-6ab5e91926f7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:53:13Z
album: RIP PLUNGER X RIP Corbin*+* Remix
  type: MusicAlbum
  date published: 2024-09-07
album: Trap!
  type: MusicAlbum
  date published: 2024-10-11
album: IMDAMAN!
  type: MusicAlbum
  date published: 2024-12-03
album: trap!
  type: MusicAlbum
  date published: 2024-12-03
album: lamb truck!
  type: MusicAlbum
  date published: 2024-12-14
album: GEEKED!
  type: MusicAlbum
  date published: 2025-02-15
  track: GEEKED!
    type: MusicRecording
    duration: PT2M59S
    duration ms: 179908
    explicit: true
    by artist: letter4
    in album: GEEKED!
      type: MusicAlbum
      date published: 2025-02-15
    isrc code: QZL382557653
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T05:35:53+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x2d1b6dc0173834d8148af5b888188211b16668022026b2aa88f278726225f977
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956634
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956634
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZL382557653
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-04T10:04:33Z
    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 0x2d1b6dc0173834d8148af5b888188211b16668022026b2aa88f278726225f977. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZL382557653.
      date published: 2026-07-04T10:04:33Z
    audio: GEEKED!
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 91.013
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.789
      additional property: Energy
        type: PropertyValue
        value: 0.45
      additional property: Speechiness
        type: PropertyValue
        value: 0.229
      additional property: Acousticness
        type: PropertyValue
        value: 0.052
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.131
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.356
      additional property: Loudness (dB)
        type: PropertyValue
        value: -12.118
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: TRAP!
  type: MusicAlbum
  date published: 2025-03-19
album: RED DOT!
  type: MusicAlbum
  date published: 2025-04-18
album: BOUNCE OUT!
  type: MusicAlbum
  date published: 2025-05-16
album: 2 Freaky Hoes
  type: MusicAlbum
  date published: 2025-05-31
album: bricks in/bricks out!
  type: MusicAlbum
  date published: 2025-07-26