Kind off gives me an idea to make a special card that one can carry that is somehow linked to your identity and records all your whereabouts in a way that can't

Kind off gives me an idea to make a special card that one can carry that is somehow linked to your identity and records all your whereabouts in a way that can't be faked. Then if you ever have to prove that you were in a certain place you can give the card. Obviously it would make it pretty hard if you were lying so no one would want to carry it :) (ignoring the various technology restrictions of this scheme)