The new cryptocurrency registry that Hacienda and the Police will be able to consult
The system will require certain operators to communicate who opens or closes an account and will allow authorities to access that information.

The system will require certain operators to communicate who opens or closes an account and will allow authorities to access that information.
Source: https://www.democrata.es/en/economy/the-new-cryptocurrency-registry-that-hacienda-and-the-police-will-be-able-to-consult/