Antonis Kafetzopoulos
type: MusicGroup
genre: entehno
description: Antonis Kafetzopoulos (; born 13 October 1951) is a Greek actor. He has appeared in more than fifty films since 1980. He has won two Hellenic Film Academy Awards for his roles in the films Plato's Aca
popularity: 12
followers: 733
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6a261db762cc7976d822f57ff494816c5957061080814535b465ec5a8d972815
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953625
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953625
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2df5feca-b66a-4e9e-b5e1-e98b59db52a5.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2df5feca-b66a-4e9e-b5e1-e98b59db52a5.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2df5feca-b66a-4e9e-b5e1-e98b59db52a5
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T11:37:06Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6a261db762cc7976d822f57ff494816c5957061080814535b465ec5a8d972815","name":"Antonis Kafetzopoulos","registered_at":"2026-06-14T09:14:03Z","symbol":"NIM0406636","token_address":"0x68f9c129837b7080816e2468875300aab9d19b94","type":"artist","uuid":"2df5feca-b66a-4e9e-b5e1-e98b59db52a5"}
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 0x6a261db762cc7976d822f57ff494816c5957061080814535b465ec5a8d972815. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2df5feca-b66a-4e9e-b5e1-e98b59db52a5.json and https://artists.proofprofile.net/proofs/artist/2df5feca-b66a-4e9e-b5e1-e98b59db52a5.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-14T11:37:06Z
  text: {"copyright_id":"0x6a261db762cc7976d822f57ff494816c5957061080814535b465ec5a8d972815","name":"Antonis Kafetzopoulos","registered_at":"2026-06-14T09:14:03Z","symbol":"NIM0406636","token_address":"0x68f9c129837b7080816e2468875300aab9d19b94","type":"artist","uuid":"2df5feca-b66a-4e9e-b5e1-e98b59db52a5"}
album: Mia Fora Ki Enan Kero
  type: MusicAlbum
  date published: 2017-01-16