Ria Valk
type: MusicGroup
genre: nederpop
description: Ria Valk (born 11 February 1941 in Eindhoven) is a Dutch singer, presenter, actress, lyricist and painter. She is best known as a singer of cheerful and comical songs. She acted in the TV series Zeg '
popularity: 28
followers: 5916
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x37a1e9ce463f3f5e0ce698464d2f546bc9871281c7834ef4c38e9ecddaed674c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/053e21e8-457f-46f8-a01d-540329a4740f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/053e21e8-457f-46f8-a01d-540329a4740f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/053e21e8-457f-46f8-a01d-540329a4740f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x37a1e9ce463f3f5e0ce698464d2f546bc9871281c7834ef4c38e9ecddaed674c","name":"Ria Valk","registered_at":"2026-06-12T14:55:56Z","symbol":"NIM0007389","token_address":"0x384fe5528883df7be2aa249d705bb7f4605f24e1","type":"artist","uuid":"053e21e8-457f-46f8-a01d-540329a4740f"}
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 0x37a1e9ce463f3f5e0ce698464d2f546bc9871281c7834ef4c38e9ecddaed674c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/053e21e8-457f-46f8-a01d-540329a4740f.json and https://artists.proofprofile.net/proofs/artist/053e21e8-457f-46f8-a01d-540329a4740f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x37a1e9ce463f3f5e0ce698464d2f546bc9871281c7834ef4c38e9ecddaed674c","name":"Ria Valk","registered_at":"2026-06-12T14:55:56Z","symbol":"NIM0007389","token_address":"0x384fe5528883df7be2aa249d705bb7f4605f24e1","type":"artist","uuid":"053e21e8-457f-46f8-a01d-540329a4740f"}
album: 65 Jaar Hits
  type: MusicAlbum
  date published: 2024-02-05