TDUP - Tuna do Distrito Universitário do Porto
type: MusicGroup
genre: fado
popularity: 2
followers: 66
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x61d420c6eae25f0c9bb2a89e8bd585368cf3a732597848697814241926662295
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953947
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953947
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/221e08b0-05c2-45a0-9b90-56e47973aa0a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/221e08b0-05c2-45a0-9b90-56e47973aa0a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/221e08b0-05c2-45a0-9b90-56e47973aa0a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T13:14:26Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x61d420c6eae25f0c9bb2a89e8bd585368cf3a732597848697814241926662295","name":"TDUP - Tuna do Distrito Universitário do Porto","registered_at":"2026-06-16T01:31:26Z","symbol":"NIM0895199","token_address":"0xe76f123b34b38cdb1b5a4899965ccad4987caabd","type":"artist","uuid":"221e08b0-05c2-45a0-9b90-56e47973aa0a"}
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 0x61d420c6eae25f0c9bb2a89e8bd585368cf3a732597848697814241926662295. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/221e08b0-05c2-45a0-9b90-56e47973aa0a.json and https://artists.proofprofile.net/proofs/artist/221e08b0-05c2-45a0-9b90-56e47973aa0a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T13:28:01Z
  text: {"copyright_id":"0x61d420c6eae25f0c9bb2a89e8bd585368cf3a732597848697814241926662295","name":"TDUP - Tuna do Distrito Universitário do Porto","registered_at":"2026-06-16T01:31:26Z","symbol":"NIM0895199","token_address":"0xe76f123b34b38cdb1b5a4899965ccad4987caabd","type":"artist","uuid":"221e08b0-05c2-45a0-9b90-56e47973aa0a"}
album: Tuna do Distrito Universitário do Porto
  type: MusicAlbum
  date published: 2014-10-31
album: Tuna do Distrito Universitário do Porto
  type: MusicAlbum
  date published: 2014-10-31
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  type: MusicAlbum
  date published: 2024-05-01
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  type: MusicAlbum
  date published: 2024-05-01