After Kornan attacked Leskit in a drunken rage, Ortikan tried to help, but was forced to the ground by Kornan. He began punching the younger Klingon with his fist until Dax shot Kornan with a phaser, stunning him. Dax later took Ortikan to surgery. (DS9: "Soldiers of the Empire")
The spelling of his name comes from the end credits of the episode. Some other sources like the script, the Star Trek Encyclopedia (4th ed., vol. 2, p. 115), or the cast list at StarTrek.com are listing him as "Ortakin".