This article has two main purposes. On the one hand, it aims to systematise the progress made by the European Court of Human Rights (ECtHR) in the creation of common standards for the protection of trans people, in particular regarding rectification of one's registered sex. On the other, it intends to verify to what extent said standards have been incorporated into the Draft Bill on LGBTI rights currently under discussion in Spain. To this end, it will analyse the Draft Bill from the standpoint of the case-law developed by the ECtHR on the matter. It will also make some critical reflections on this case-law from the standpoint of the rights it is set to protect.