In a small bowl, combine the melted butter, egg white, and the bagel chips. Press them into the bottom of a 10-inch spring form pan. Bake for 8 minutes to crisp up. Remove from oven and cool. Reduce the heat to 250 degrees F.
In a mixing bowl fitted with a paddle attachment, blend the cream cheese, cornstarch, salt, and sour cream. Once combined, add the eggs. Fold in trout and chives. Pour the batter over the cooled crust. Bake for 1 hour. Turn the oven off and leave the cake in the oven for an additional hour without opening the door. Cool on a rack for at least 4 hours. Carefully unmold. Keep refrigerated until ready to serve.