Floris Jansen
type: MusicGroup
description: Floris Jansen (born 10 June 1962) is a Dutch former cricketer. He played two One Day Internationals for the Netherlands. Both the matches, against Pakistan, were within five days of each other in Febr
popularity: 4
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1c21b846176a4bf60f397ab97de076001762ca1a724613cc516ade5932f623da
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953909
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953909
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/158e2623-c522-4169-b6af-a49a3fd66146.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/158e2623-c522-4169-b6af-a49a3fd66146.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/158e2623-c522-4169-b6af-a49a3fd66146
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T07:53:13Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1c21b846176a4bf60f397ab97de076001762ca1a724613cc516ade5932f623da","name":"Floris Jansen","registered_at":"2026-06-15T20:57:27Z","symbol":"NIM0829812","token_address":"0xaf35657f83e007e3ce593eb2806e5aea645d1677","type":"artist","uuid":"158e2623-c522-4169-b6af-a49a3fd66146"}
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 0x1c21b846176a4bf60f397ab97de076001762ca1a724613cc516ade5932f623da. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/158e2623-c522-4169-b6af-a49a3fd66146.json and https://artists.proofprofile.net/proofs/artist/158e2623-c522-4169-b6af-a49a3fd66146.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:53:13Z
  text: {"copyright_id":"0x1c21b846176a4bf60f397ab97de076001762ca1a724613cc516ade5932f623da","name":"Floris Jansen","registered_at":"2026-06-15T20:57:27Z","symbol":"NIM0829812","token_address":"0xaf35657f83e007e3ce593eb2806e5aea645d1677","type":"artist","uuid":"158e2623-c522-4169-b6af-a49a3fd66146"}