Quarteto Liberdade
type: MusicGroup
popularity: 6
followers: 1164
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4649c9f6fa52be2100db5da7ee3f4d3f2c5cf49cc055c4a044854e1d9ad565b7
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954717
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954717
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f66daed5-2284-45fe-a52f-346ee8cc5a13.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f66daed5-2284-45fe-a52f-346ee8cc5a13.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f66daed5-2284-45fe-a52f-346ee8cc5a13
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T15:47:51Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4649c9f6fa52be2100db5da7ee3f4d3f2c5cf49cc055c4a044854e1d9ad565b7","name":"Quarteto Liberdade","registered_at":"2026-06-21T15:26:24Z","symbol":"NIM1958969","token_address":"0xfae0ca959906610ecf52f05a0975d98d83c6b6c9","type":"artist","uuid":"f66daed5-2284-45fe-a52f-346ee8cc5a13"}
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 0x4649c9f6fa52be2100db5da7ee3f4d3f2c5cf49cc055c4a044854e1d9ad565b7. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f66daed5-2284-45fe-a52f-346ee8cc5a13.json and https://artists.proofprofile.net/proofs/artist/f66daed5-2284-45fe-a52f-346ee8cc5a13.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T15:47:51Z
  text: {"copyright_id":"0x4649c9f6fa52be2100db5da7ee3f4d3f2c5cf49cc055c4a044854e1d9ad565b7","name":"Quarteto Liberdade","registered_at":"2026-06-21T15:26:24Z","symbol":"NIM1958969","token_address":"0xfae0ca959906610ecf52f05a0975d98d83c6b6c9","type":"artist","uuid":"f66daed5-2284-45fe-a52f-346ee8cc5a13"}
album: Vamos para o Lar
  type: MusicAlbum
  date published: 2018-02-08
  track: Haja Paz na Terra
    type: MusicRecording
    duration: PT2M56S
    duration ms: 176000
    explicit: false
    by artist: Quarteto Liberdade
    in album: Vamos para o Lar
      type: MusicAlbum
      date published: 2018-02-08
    isrc code: QZ5AB1863512
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-22T07:02:04+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x2273d21648147c1626c85048f11d5758c4c682121a59f00310da521148984785
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959109
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959109
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5AB1863512
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-22T10:04:09Z
    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 0x2273d21648147c1626c85048f11d5758c4c682121a59f00310da521148984785. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:04:09Z), 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/QZ5AB1863512.
      date published: 2026-07-22T10:04:09Z
    audio: Haja Paz na Terra
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 94.895
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.259
      additional property: Energy
        type: PropertyValue
        value: 0.178
      additional property: Speechiness
        type: PropertyValue
        value: 0.027
      additional property: Acousticness
        type: PropertyValue
        value: 0.913
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.195
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.085
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.864
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Dios Tu Nombre Exaltaré
  type: MusicAlbum
  date published: 2018-10-02
album: Natal Puro
  type: MusicAlbum
  date published: 2018-12-06
album: Teu Redentor
  type: MusicAlbum
  date published: 2019-03-15
album: Na Cruz Me Salvou
  type: MusicAlbum
  date published: 2019-09-20
album: Ele Vive
  type: MusicAlbum
  date published: 2020-04-18