Blockchain verified · Powered by Chainlink VRF
Every draw. Independently verifiable. Forever.
The OCSA Certified Draw system uses Chainlink VRF to generate provably random winning tickets. Every result is written permanently to the Polygon blockchain. No trust in OCSA required.
View the OCSA Draw System →Public draw register · Certificate verification · Operator login
Genuinely independent
The winning ticket is generated by Chainlink's decentralised oracle network. OCSA cannot influence, predict, or alter any result.
Publicly verifiable
Every result is published to the Polygon blockchain. Anyone can independently verify any draw using the transaction hash on Polygonscan.
Permanent record
Blockchain records cannot be altered or deleted. Every OCSA draw result is preserved permanently, regardless of what happens to any operator.
DCMS Code compliant
The DCMS Voluntary Code requires verifiably random and auditable draw processes. Chainlink VRF is the industry standard for provably fair randomness.
OCSA Blockchain Draw Certificate
OCSA-2026-04-22-0001
Winning ticket
4827361
Lamborghini Huracan EVO — April 2026
Transaction hash0x3f8a2c91d4e7b05f6a1c3d9e2b7f4a8c5d1e3f9b...
Block number58,247,391
NetworkPolygon mainnet · Chainlink VRF v2.5
Verify independentlypolygonscan.com/tx/0x3f8a... ↗
This result was generated by Chainlink VRF and written permanently to the Polygon blockchain. It cannot be altered by OCSA, the operator, or any third party. The transaction hash is your independent proof.
Ready to run certified draws?
OCSA Certified Draw is available to OCSA-certified operators. Each draw costs £2.50 and produces an independently verifiable blockchain certificate automatically, emailed to the operator and published to the public register.
Contact OCSA to get started