In this paper. we use the blockchain technology to design a prototype to secure process data from a 3D-printer. Datastreams are gathered from various sources such as OPC UA servers and autonomous retrofit sensor nodes. This is followed by pre-processing for data reduction. https://www.roneverhart.com/Port-Company-Women-s-Tri-Blend-V-Neck-Tee-LPC330V-Port-Company-LPC330V/