Kostas Hatzis
type: MusicGroup
genre: entehno
genre: laïko
description: Kostas Hatzis (also Chatzis or Khadzis; , ; born 13 August 1936) is a Greco-Romani singer-songwriter. Hatzis was born in the city of Livadeia to a Romani family. Considered a leading composer and a p
popularity: 8
followers: 933
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdaddc57cb44ec50c2dceeba2e94e6c40d894d24304d6cd3d7baad450cde55f10
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954587
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954587
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b8f4b333-cb66-4a07-afa6-ac08a7ead039.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b8f4b333-cb66-4a07-afa6-ac08a7ead039.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b8f4b333-cb66-4a07-afa6-ac08a7ead039
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T19:10:41Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xdaddc57cb44ec50c2dceeba2e94e6c40d894d24304d6cd3d7baad450cde55f10","name":"Kostas Hatzis","registered_at":"2026-06-20T16:29:32Z","symbol":"NIM1653725","token_address":"0x57e631a22361adb396bb01ef2430cb81f656a451","type":"artist","uuid":"b8f4b333-cb66-4a07-afa6-ac08a7ead039"}
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 0xdaddc57cb44ec50c2dceeba2e94e6c40d894d24304d6cd3d7baad450cde55f10. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8f4b333-cb66-4a07-afa6-ac08a7ead039.json and https://artists.proofprofile.net/proofs/artist/b8f4b333-cb66-4a07-afa6-ac08a7ead039.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T19:10:41Z
  text: {"copyright_id":"0xdaddc57cb44ec50c2dceeba2e94e6c40d894d24304d6cd3d7baad450cde55f10","name":"Kostas Hatzis","registered_at":"2026-06-20T16:29:32Z","symbol":"NIM1653725","token_address":"0x57e631a22361adb396bb01ef2430cb81f656a451","type":"artist","uuid":"b8f4b333-cb66-4a07-afa6-ac08a7ead039"}
album: Mousiki Ierosylia
  type: MusicAlbum
  date published: 2007-10-12
album: Antitheseis (Live at Kyttaro)
  type: MusicAlbum
  date published: 2009-09-11
album: Antitheseis (Live at Kyttaro)
  type: MusicAlbum
  date published: 2009-09-11
album: O Kathreftis
  type: MusicAlbum
  date published: 2021-02-05