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.nacrack.com/hot-find-Kyocera-Cadence-LTE-S2720-Verizon-Wireless-top-buy/