I was invited to present on a demo I helped create, linking Blockchain to an existing system of record application. The idea is that the CICS application is for a motor vehicle insurance company, and is updated through a 3270 panel. This allows mistakes, or nefarious updates, to the records by anyone with access. Since another team in the organisation is using Blockchain for vehicle data provenance and sharing with third parties, we show how to couple this to the CICS application with minimal code changes. z/OS Connect EE is used along the way.