Trophies are awarded in Grand Prix for getting a podium position (1st, 2nd, 3rd). The trophies colour depends on which difficulty you cleared the cup on. Bronze for C-class, silver for B-class, gold for A-class and platinum for S-class. Since the game doesn't keep track of which place you got on a specific cup, there is no way to tell which one you got second place on.
"Body armor is for your body not your head."- My bro's friend after shooting my character in the head on Golden Eye 007 NNID: a_HUGE_hotspring