Helena Houdova
type: MusicGroup
popularity: 10
followers: 56
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa436cc7917acbd706fe7631edd4f8acbaa0bbd50e7b33e6e15abe9cbc24a9007
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/db29b817-7077-4251-83d0-4d79187adecb.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/db29b817-7077-4251-83d0-4d79187adecb.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/db29b817-7077-4251-83d0-4d79187adecb
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa436cc7917acbd706fe7631edd4f8acbaa0bbd50e7b33e6e15abe9cbc24a9007","name":"Helena Houdova","registered_at":"2026-06-21T04:37:35Z","symbol":"NIM1822286","token_address":"0x7855651caa1869105c63791e8f77fd03d7c55123","type":"artist","uuid":"db29b817-7077-4251-83d0-4d79187adecb"}
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 0xa436cc7917acbd706fe7631edd4f8acbaa0bbd50e7b33e6e15abe9cbc24a9007. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db29b817-7077-4251-83d0-4d79187adecb.json and https://artists.proofprofile.net/proofs/artist/db29b817-7077-4251-83d0-4d79187adecb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0xa436cc7917acbd706fe7631edd4f8acbaa0bbd50e7b33e6e15abe9cbc24a9007","name":"Helena Houdova","registered_at":"2026-06-21T04:37:35Z","symbol":"NIM1822286","token_address":"0x7855651caa1869105c63791e8f77fd03d7c55123","type":"artist","uuid":"db29b817-7077-4251-83d0-4d79187adecb"}