In this talk, you will learn how Blockchain can support GDPR compliance. Based on a paper the speaker Michael Kolain and Christian Wirth have submitted to the European Society for Socially Embedded Technologies (EUSSET) we will look at a proposal on how to bringing to live the certification mechanisms according to Art. 42 of the General Data Protection Regulation (GDPR). The authors highlight further legal problems concerning blockchain technology under the GDPR that will have to be addressed in order to achieve a comprehensive certification mechanism for Privacy by Blockchain Design in the future.