Double F
type: MusicGroup
popularity: 5
followers: 63
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5358c8ac2e6bd008b32ed807b208894718e97f9df2ae324e5cd1ef9bc5b162c6
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953879
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953879
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0967395b-723a-4a0d-8162-39dc30b85708.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0967395b-723a-4a0d-8162-39dc30b85708.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0967395b-723a-4a0d-8162-39dc30b85708
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T02:57:35Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x5358c8ac2e6bd008b32ed807b208894718e97f9df2ae324e5cd1ef9bc5b162c6","name":"Double F","registered_at":"2026-06-15T16:45:25Z","symbol":"NIM0769689","token_address":"0xd377306f1f3d00e8d9340413f0bd093ce20f3c93","type":"artist","uuid":"0967395b-723a-4a0d-8162-39dc30b85708"}
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 0x5358c8ac2e6bd008b32ed807b208894718e97f9df2ae324e5cd1ef9bc5b162c6. Chain 2 (Bitcoin): anchored in block 953879 (2026-06-16T02:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0967395b-723a-4a0d-8162-39dc30b85708.json and https://artists.proofprofile.net/proofs/artist/0967395b-723a-4a0d-8162-39dc30b85708.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T02:57:35Z
  text: {"copyright_id":"0x5358c8ac2e6bd008b32ed807b208894718e97f9df2ae324e5cd1ef9bc5b162c6","name":"Double F","registered_at":"2026-06-15T16:45:25Z","symbol":"NIM0769689","token_address":"0xd377306f1f3d00e8d9340413f0bd093ce20f3c93","type":"artist","uuid":"0967395b-723a-4a0d-8162-39dc30b85708"}
album: The Pre-Season
  type: MusicAlbum
  date published: 2019-02-27
album: The Pre-Season
  type: MusicAlbum
  date published: 2019-02-27
album: The Perfect Pitch
  type: MusicAlbum
  date published: 2020-03-11
album: The Module
  type: MusicAlbum
  date published: 2020-10-27
  track: Silde Out
    type: MusicRecording
    duration: PT1M51S
    duration ms: 111600
    explicit: false
    by artist: Double F
    in album: The Module
      type: MusicAlbum
      date published: 2020-10-27
    isrc code: QZMER2044241
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T19:05:23+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xdccf9bda407ce9ddc6840a169b3aa5f5e70cccffcbccd14b9ee6da3fc6aa58f9
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956725
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956725
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMER2044241
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T01:12:41Z
    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 0xdccf9bda407ce9ddc6840a169b3aa5f5e70cccffcbccd14b9ee6da3fc6aa58f9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMER2044241.
      date published: 2026-07-05T01:12:41Z
    audio: Silde Out
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 174.89
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.595
      additional property: Energy
        type: PropertyValue
        value: 0.786
      additional property: Speechiness
        type: PropertyValue
        value: 0.508
      additional property: Acousticness
        type: PropertyValue
        value: 0.346
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.175
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.356
      additional property: Loudness (dB)
        type: PropertyValue
        value: -8.182
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Blasphemy
  type: MusicAlbum
  date published: 2023-06-24
album: Pz n Ruz
  type: MusicAlbum
  date published: 2025-08-16