Kotowicz won eight medals at the ICF Canoe Sprint World Championships with three silvers (K-1 200 m: 1997, K-1 500 m: 1997, K-4 1000 m: 1994) and five bronzes (K-1 500 m: 1999, K-2 1000 m: 1995, 1997; K-4 500 m: 1995, K-4 1000 m: 1995).