Two second half goals from Obed Owusu and Emmanuel Gyamfi were enough to hand the hosts another victory, making it 4-0 on aggregate after winning the first leg on the same scoreline.
“Hearts and Kotoko games are always difficult so a win for us is special,” Annan told Otec FM.
“Moreover, it is more than three points for the fans since there's always bragging rights at stake.
“As players, we go into every game with the same way but when you win against Hearts of Oak twice, it is special because of the fans' reactions. Everyone at the club is excited because we have been able to complete a double over them for the first time in several years,” he added.
Kotoko completed a double over the Phobians for the first time in almost two decades.