QFB
type: MusicGroup
genre: rap metal
description: QFB may refer to: Ratchet & Clank Future: Quest for Booty, the eighth game in the Ratchet & Clank video game series Freiburg Hauptbahnhof, Freiburg, Germany railway station (IATA airport code)
popularity: 4
followers: 99
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2ba8a2c04ec7c637c79d475f8cc70c86c35b3661dc385ad28ffe211a0d3b9737
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953980
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953980
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2b91c77a-74b5-4f5b-8213-52a7091f2442.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2b91c77a-74b5-4f5b-8213-52a7091f2442.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2b91c77a-74b5-4f5b-8213-52a7091f2442
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T17:16:51Z
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 0x2ba8a2c04ec7c637c79d475f8cc70c86c35b3661dc385ad28ffe211a0d3b9737. Chain 2 (Bitcoin): anchored in block 953980 (2026-06-16T17:16:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b91c77a-74b5-4f5b-8213-52a7091f2442.json and https://artists.proofprofile.net/proofs/artist/2b91c77a-74b5-4f5b-8213-52a7091f2442.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T17:16:51Z
album: Compañeiro Daniel
  type: MusicAlbum
  date published: 2021-06-19
album: Compañeiro Daniel
  type: MusicAlbum
  date published: 2021-06-19
album: NaviRap
  type: MusicAlbum
  date published: 2022-02-04
album: Doces soños
  type: MusicAlbum
  date published: 2022-03-06
album: Rexurdir
  type: MusicAlbum
  date published: 2022-12-20
album: Ei Levántate!
  type: MusicAlbum
  date published: 2023-09-03
  track: Ei Levántate!
    type: MusicRecording
    duration: PT4M37S
    duration ms: 277890
    explicit: false
    by artist: QFB
    in album: Ei Levántate!
      type: MusicAlbum
      date published: 2023-09-03
    genre: rap metal
    isrc code: SE6XW2323997
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-22T03:32:43+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x6b1d092df351ff6a66b1b488fb19bf588673365b21e10b7312a55e883a482f6e
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959096
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959096
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6XW2323997
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-22T03:48:36Z
    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 0x6b1d092df351ff6a66b1b488fb19bf588673365b21e10b7312a55e883a482f6e. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/SE6XW2323997.
      date published: 2026-07-22T03:48:36Z
    audio: Ei Levántate!
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 170.022
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.559
      additional property: Energy
        type: PropertyValue
        value: 0.942
      additional property: Speechiness
        type: PropertyValue
        value: 0.32
      additional property: Acousticness
        type: PropertyValue
        value: 0.03
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.549
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.606
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.63
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: REVOLUCION (EME-SX remix)
  type: MusicAlbum
  date published: 2024-01-28
album: Pedras contra tanques
  type: MusicAlbum
  date published: 2024-02-25
album: Somos Patrimonio
  type: MusicAlbum
  date published: 2025-04-03