Tuna Universitária Da Madeira
type: MusicGroup
genre: fado
popularity: 18
followers: 482
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xac8685083a00325fb21f36cc954f83b5fa5fd13af8a69234f767d66f48278676
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953648
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953648
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/408555c5-ac2b-4ff6-a23c-89fb340b7085.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/408555c5-ac2b-4ff6-a23c-89fb340b7085.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/408555c5-ac2b-4ff6-a23c-89fb340b7085
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T15:20:52Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xac8685083a00325fb21f36cc954f83b5fa5fd13af8a69234f767d66f48278676","name":"Tuna Universitária Da Madeira","registered_at":"2026-06-14T11:14:58Z","symbol":"NIM0435482","token_address":"0x50f6e08411756d033f01c983b2bb8df779b9f08d","type":"artist","uuid":"408555c5-ac2b-4ff6-a23c-89fb340b7085"}
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 0xac8685083a00325fb21f36cc954f83b5fa5fd13af8a69234f767d66f48278676. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/408555c5-ac2b-4ff6-a23c-89fb340b7085.json and https://artists.proofprofile.net/proofs/artist/408555c5-ac2b-4ff6-a23c-89fb340b7085.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T15:20:52Z
  text: {"copyright_id":"0xac8685083a00325fb21f36cc954f83b5fa5fd13af8a69234f767d66f48278676","name":"Tuna Universitária Da Madeira","registered_at":"2026-06-14T11:14:58Z","symbol":"NIM0435482","token_address":"0x50f6e08411756d033f01c983b2bb8df779b9f08d","type":"artist","uuid":"408555c5-ac2b-4ff6-a23c-89fb340b7085"}
album: 25 Anos
  type: MusicAlbum
  date published: 2019-11-30
album: 25 anos (2019)
  type: MusicAlbum
  date published: 2019-11-30
  track: Por Ti
    type: MusicRecording
    duration: PT4M2S
    duration ms: 242155
    explicit: false
    by artist: Tuna Universitária Da Madeira
    in album: 25 anos (2019)
      type: MusicAlbum
      date published: 2019-11-30
    genre: fado
    isrc code: QZK6N2077675
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T16:42:06+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xa5814431ca599275a06ebca2299ed0a41a2e3041fd465ab60e479fca8053fc97
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956551
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956551
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6N2077675
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T21:18:05Z
    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 0xa5814431ca599275a06ebca2299ed0a41a2e3041fd465ab60e479fca8053fc97. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6N2077675.
      date published: 2026-07-03T21:18:05Z
    audio: Por Ti
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 83.059
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.292
      additional property: Energy
        type: PropertyValue
        value: 0.225
      additional property: Speechiness
        type: PropertyValue
        value: 0.031
      additional property: Acousticness
        type: PropertyValue
        value: 0.582
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.065
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.573
      additional property: Loudness (dB)
        type: PropertyValue
        value: -12.85
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Major