This thesis has two main objectives, the first one is to analyze what are the main problems of incompatibility between blockchain and data privacy laws, and how they can be solved, according to the main sources to date, with particular attention in case blockchains need to collaborate with IoT devices, which often have limited computing capabilities, now present in any field of major companies. Finally, based on the study of the first part, a viable solution is proposed for the study case of the new Stellantis' blockchain under development for its Supply Chain and Logistics Networks in the production of batteries for electric vehicles.