Many might’ve seen the Australian ban of social media for <16 y.o with no idea of how to implement it. There have been mentions of “double blind age verification”, but I can’t find any information on it.
Out of curiosity, how would you implement this with privacy in mind if you really had to?
Not only don’t you need to, you would really have to know the generator of the token because it needs to verify that you are the user that was issued the token.