I already acknowledged the Grand Prix, and it's not a real belt
Fedor was the PRIDE HW champion and Cro Cop won a tournament
Grand Prix is also world championship. Pride had 2 world titles and both systems lineal and tournament championship that intercharged. And the new match between Cro Cop and Fedor was supposed to happen, but it did not take place due to unforseen higher force when Pride folded.