António Barbosa
type: MusicGroup
genre: organic house
description: António Fernando Barbosa da Silva (born 3 November 1931), known simply as Barbosa, is a Portuguese former footballer who played as a defender and made two appearances for the Portugal national team.
popularity: 21
followers: 98
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x748984b861a17291a2f9c7a15322c38dcea8032190e4baab1ffb817bde1a7ddd
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9cc7433e-d103-4dab-a3d4-c0be01360354.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9cc7433e-d103-4dab-a3d4-c0be01360354.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9cc7433e-d103-4dab-a3d4-c0be01360354
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x748984b861a17291a2f9c7a15322c38dcea8032190e4baab1ffb817bde1a7ddd","name":"António Barbosa","registered_at":"2026-06-12T05:34:07Z","symbol":"NIM0201979","token_address":"0x423cb52e5b273ac109b372db94d2daa61a103930","type":"artist","uuid":"9cc7433e-d103-4dab-a3d4-c0be01360354"}
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 0x748984b861a17291a2f9c7a15322c38dcea8032190e4baab1ffb817bde1a7ddd. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cc7433e-d103-4dab-a3d4-c0be01360354.json and https://artists.proofprofile.net/proofs/artist/9cc7433e-d103-4dab-a3d4-c0be01360354.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x748984b861a17291a2f9c7a15322c38dcea8032190e4baab1ffb817bde1a7ddd","name":"António Barbosa","registered_at":"2026-06-12T05:34:07Z","symbol":"NIM0201979","token_address":"0x423cb52e5b273ac109b372db94d2daa61a103930","type":"artist","uuid":"9cc7433e-d103-4dab-a3d4-c0be01360354"}
album: Venezia (Max TenRom Remix)
  type: MusicAlbum
  date published: 2024-07-19