Tuna Universitária de Aveiro
type: MusicGroup
genre: fado
popularity: 9
followers: 794
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1be70418700e5c6ecb7ebff501aae98b14d3aa79e13470af717cb49ba46afcb7
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/81cb2919-003f-45a2-bc0c-6efce1e961a2.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/81cb2919-003f-45a2-bc0c-6efce1e961a2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/81cb2919-003f-45a2-bc0c-6efce1e961a2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1be70418700e5c6ecb7ebff501aae98b14d3aa79e13470af717cb49ba46afcb7","name":"Tuna Universitária de Aveiro","registered_at":"2026-06-17T10:49:16Z","symbol":"NIM1371926","token_address":"0x88977c50065a8e77e43956cb1fa473da1b8b27ff","type":"artist","uuid":"81cb2919-003f-45a2-bc0c-6efce1e961a2"}
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 0x1be70418700e5c6ecb7ebff501aae98b14d3aa79e13470af717cb49ba46afcb7. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81cb2919-003f-45a2-bc0c-6efce1e961a2.json and https://artists.proofprofile.net/proofs/artist/81cb2919-003f-45a2-bc0c-6efce1e961a2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0x1be70418700e5c6ecb7ebff501aae98b14d3aa79e13470af717cb49ba46afcb7","name":"Tuna Universitária de Aveiro","registered_at":"2026-06-17T10:49:16Z","symbol":"NIM1371926","token_address":"0x88977c50065a8e77e43956cb1fa473da1b8b27ff","type":"artist","uuid":"81cb2919-003f-45a2-bc0c-6efce1e961a2"}
album: FITUA
  type: MusicAlbum
  date published: 2004-04-24
album: Barco de Aveiro (250 Anos)
  type: MusicAlbum
  date published: 2009-01-01
  track: Barco de Aveiro (250 Anos)
    type: MusicRecording
    duration: PT4M56S
    duration ms: 296097
    explicit: false
    by artist: Tuna Universitária de Aveiro
    in album: Barco de Aveiro (250 Anos)
      type: MusicAlbum
      date published: 2009-01-01
    genre: fado
    isrc code: QZES52139375
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T20:33:26+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x730ba30e8b0b636e1aa72c45157997dbc57e3d10498a8a6aa6d43d497e8d9c54
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958779
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958779
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES52139375
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T21:08:39Z
    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 0x730ba30e8b0b636e1aa72c45157997dbc57e3d10498a8a6aa6d43d497e8d9c54. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZES52139375.
      date published: 2026-07-19T21:08:39Z
    audio: Barco de Aveiro (250 Anos)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 79.382
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.35
      additional property: Energy
        type: PropertyValue
        value: 0.213
      additional property: Speechiness
        type: PropertyValue
        value: 0.03
      additional property: Acousticness
        type: PropertyValue
        value: 0.54
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.007
      additional property: Liveness
        type: PropertyValue
        value: 0.372
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.454
      additional property: Loudness (dB)
        type: PropertyValue
        value: -19.46
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: TUA ao Vivo (Live)
  type: MusicAlbum
  date published: 2023-03-30