qua
type: MusicGroup
description: Qua or QUA may refer to: Qua (album), a 2009 album by German band Cluster Alfonso Qua, sailor from Philippines Castle Qua, in Scotland Lam Qua (1801–1860), Chinese painter Quapaw language Qua, a rec
popularity: 3
followers: 16
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xce412d86a34ee6c53565a6d95030fd1f3472351e84491c9390257bbd5f33816f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954533
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954533
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a45e93ae-255d-4265-ac9d-665b0faf9246.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a45e93ae-255d-4265-ac9d-665b0faf9246.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a45e93ae-255d-4265-ac9d-665b0faf9246
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T08:57:02Z
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 0xce412d86a34ee6c53565a6d95030fd1f3472351e84491c9390257bbd5f33816f. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a45e93ae-255d-4265-ac9d-665b0faf9246.json and https://artists.proofprofile.net/proofs/artist/a45e93ae-255d-4265-ac9d-665b0faf9246.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T08:57:02Z
album: lame
  type: MusicAlbum
  date published: 2025-01-27
album: too silly
  type: MusicAlbum
  date published: 2025-01-30
album: OTP
  type: MusicAlbum
  date published: 2025-01-31
  track: OTP
    type: MusicRecording
    duration: PT1M56S
    duration ms: 116680
    explicit: true
    by artist: qua
    in album: OTP
      type: MusicAlbum
      date published: 2025-01-31
    isrc code: QZDA82535267
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-22T04:37:04+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x01a7f1d43bdfe71f05e71f8d67bbfb3476a7f2f5ba5e27f960a619529091ad0d
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959100
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959100
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA82535267
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-22T05:29:55Z
    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 0x01a7f1d43bdfe71f05e71f8d67bbfb3476a7f2f5ba5e27f960a619529091ad0d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZDA82535267.
      date published: 2026-07-22T05:29:55Z
    audio: OTP
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 148.066
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.578
      additional property: Energy
        type: PropertyValue
        value: 0.513
      additional property: Speechiness
        type: PropertyValue
        value: 0.034
      additional property: Acousticness
        type: PropertyValue
        value: 0.02
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.119
      additional property: Liveness
        type: PropertyValue
        value: 0.24
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.168
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.161
      additional property: Key Name
        type: PropertyValue
        value: Bb
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: coding
  type: MusicAlbum
  date published: 2025-02-04
album: tragic
  type: MusicAlbum
  date published: 2025-02-16
album: expensive wine
  type: MusicAlbum
  date published: 2025-02-27
album: dave blunts
  type: MusicAlbum
  date published: 2025-02-27
album: carlsbad
  type: MusicAlbum
  date published: 2025-02-27
album: one two (freestyle)
  type: MusicAlbum
  date published: 2025-03-05
album: PRINCETON AVE
  type: MusicAlbum
  date published: 2025-04-02
album: number one !
  type: MusicAlbum
  date published: 2025-04-25