Start by making your BBQ sauce. Place all ingredients into a medium sized saucepan and bring to a simmer, stirring occasionally. Let cool slightly, before placing a thin layer on the bottom of a lightly greased crockpot/slow cooker.
Place chicken breasts, in a single layer, on top. Place more BBQ on top of the chicken, reserving ½ cup for later. Cover and cook on low for 7-8 hours. When the chicken is fully cooked, shred the chicken in the crockpot, and stir in more BBQ sauce if it's too dry.
Place individual scoop chips onto a baking sheet. Fill with BBQ chicken, black beans, corn, and top with shredded cheese. Bake at 350 degrees F for 5 - 10 minutes. If you're making layered, or sheet nachos, the baking time may take longer.