Diana Est
type: MusicGroup
genre: hi-nrg
genre: italo dance
genre: italo disco
description: Cristina Barbieri (born 12 June 1963), best known as Diana Est, is an Italian singer who retired in the mid-1980s. Life and career Born in Milan, Barbieri started her career as the vocalist in a ne
popularity: 11
followers: 556
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x172bf284829d8df624b99222759235ec143eb20d8514773e4a48475f732b3c95
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953786
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953786
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/da9bb5bd-1778-4031-bb37-3a7360830a2d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/da9bb5bd-1778-4031-bb37-3a7360830a2d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/da9bb5bd-1778-4031-bb37-3a7360830a2d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T12:56:12Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x172bf284829d8df624b99222759235ec143eb20d8514773e4a48475f732b3c95","name":"Diana Est","registered_at":"2026-06-15T03:25:05Z","symbol":"NIM0666979","token_address":"0xb618ef047ae9a3b05e99c8142d134df106de4cf4","type":"artist","uuid":"da9bb5bd-1778-4031-bb37-3a7360830a2d"}
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 0x172bf284829d8df624b99222759235ec143eb20d8514773e4a48475f732b3c95. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da9bb5bd-1778-4031-bb37-3a7360830a2d.json and https://artists.proofprofile.net/proofs/artist/da9bb5bd-1778-4031-bb37-3a7360830a2d.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-15T12:56:12Z
  text: {"copyright_id":"0x172bf284829d8df624b99222759235ec143eb20d8514773e4a48475f732b3c95","name":"Diana Est","registered_at":"2026-06-15T03:25:05Z","symbol":"NIM0666979","token_address":"0xb618ef047ae9a3b05e99c8142d134df106de4cf4","type":"artist","uuid":"da9bb5bd-1778-4031-bb37-3a7360830a2d"}
album: Tenax
  type: MusicAlbum
  date published: 1982