blockchain has become one of the most relevant technologies in recent years, given the potential scope of its various applications. The intrinsically international nature of this technology makes it necessary to study its interaction with the rules of private international law that will very often come into play when using blockchain. A preliminary analysis of the issue leads to the conclusion that, although there is a certain continuity in the application of the current international private law criteria, a review of these rules is advisable in order to update and adapt them to the particularities of each of the different mechanisms derived from the blockchain, so as to increase the degree of legal certainty and promote the use and consolidation of this technology.