Axel Beelen takes a look at how blockchain and data protection regulation can be reconciled. - What is GDPR? - What are the basic principles of GDPR? - Can personal data on the blockchain (and thus application of GDPR) be avoided? - How does data minimisation pitch in? - How does pseudonymisation pitch in? - Who has what role in a blockchain setup? controller, joint controller,... - How would rights of data subjects work? The context was the second (2019) edition of the Computational Law and Blockchain Festival (#CLBFest), Brussels' node.