Armenian Grandmaster (2005), Armenian Champion 2014 and vice champion in 2007.
Best results: winner or shared first at the Ebnsina Open (IRI) 2005, Blue Sevan (ARM) 2006, Dubai Open 2009, Karen Asrian Memorial (ARM) 2010, Aeroflot Open B 2011, Keren Asrian Memorial (ARM) 2011 and 2017. Kotanjian also came third in the Iranian Open Championship 2005.
A member of the national team at the 2014 Olympiad.
Armenian Grandmaster (2005), Armenian Champion 2014 and vice champion in 2007.