Viorica Cortez
type: MusicGroup
genre: opera
description: Viorica Cortez (born 26 December 1935) is a noted Romanian-born mezzo-soprano, later French by naturalisation. Starting her operatic and concert career in the mid-1960s, she went on to become one of t
popularity: 7
followers: 135
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa7573ce31ae8ffc334b778ad79eb96200894524139088c7efa5692fcba7f923d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954593
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954593
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bdc7d8df-bfdb-4ee6-a4ea-cba4cac6952f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bdc7d8df-bfdb-4ee6-a4ea-cba4cac6952f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/bdc7d8df-bfdb-4ee6-a4ea-cba4cac6952f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T19:46:01Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa7573ce31ae8ffc334b778ad79eb96200894524139088c7efa5692fcba7f923d","name":"Viorica Cortez","registered_at":"2026-06-20T18:29:56Z","symbol":"NIM1678590","token_address":"0x605d45a9bd55bafc9da87941954018d5e792cf9f","type":"artist","uuid":"bdc7d8df-bfdb-4ee6-a4ea-cba4cac6952f"}
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 0xa7573ce31ae8ffc334b778ad79eb96200894524139088c7efa5692fcba7f923d. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bdc7d8df-bfdb-4ee6-a4ea-cba4cac6952f.json and https://artists.proofprofile.net/proofs/artist/bdc7d8df-bfdb-4ee6-a4ea-cba4cac6952f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T19:46:01Z
  text: {"copyright_id":"0xa7573ce31ae8ffc334b778ad79eb96200894524139088c7efa5692fcba7f923d","name":"Viorica Cortez","registered_at":"2026-06-20T18:29:56Z","symbol":"NIM1678590","token_address":"0x605d45a9bd55bafc9da87941954018d5e792cf9f","type":"artist","uuid":"bdc7d8df-bfdb-4ee6-a4ea-cba4cac6952f"}