Yordanka Hristova
type: MusicGroup
description: Yordanka Hristova (in Bulgarian Йорданка Христова) is a Bulgarian singer. thumb|right|255px|Yordanka Hristova in 2018 Biography Academician Yordanka Ivanova Hristova was born on 10 September 1943
popularity: 5
followers: 955
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1d811754990d62da5dd9e1b892a7d2cc727c97fca0cf36b74ab401684bb8c700
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953930
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953930
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1e77097e-0bb4-4857-8c05-87993256d5ba.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1e77097e-0bb4-4857-8c05-87993256d5ba.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1e77097e-0bb4-4857-8c05-87993256d5ba
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T10:36:13Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1d811754990d62da5dd9e1b892a7d2cc727c97fca0cf36b74ab401684bb8c700","name":"Yordanka Hristova","registered_at":"2026-06-16T00:09:51Z","symbol":"NIM0875726","token_address":"0xdf570048b518735bf73b0ddd61db32271656e5c2","type":"artist","uuid":"1e77097e-0bb4-4857-8c05-87993256d5ba"}
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 0x1d811754990d62da5dd9e1b892a7d2cc727c97fca0cf36b74ab401684bb8c700. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e77097e-0bb4-4857-8c05-87993256d5ba.json and https://artists.proofprofile.net/proofs/artist/1e77097e-0bb4-4857-8c05-87993256d5ba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
  text: {"copyright_id":"0x1d811754990d62da5dd9e1b892a7d2cc727c97fca0cf36b74ab401684bb8c700","name":"Yordanka Hristova","registered_at":"2026-06-16T00:09:51Z","symbol":"NIM0875726","token_address":"0xdf570048b518735bf73b0ddd61db32271656e5c2","type":"artist","uuid":"1e77097e-0bb4-4857-8c05-87993256d5ba"}