In a mixing bowl, combine tomatoes, chili powder, paprika, cumin, garlic powder, salt/pepper, and chipotles together.
Get your crockpot, put a liner if you like one, lay your chicken inside with 1 cup of water. Put the tomato mix on top. Cover tightly and cook on LOW for 4-6 hours or internal temp reaches 165 degrees.
Shred the chicken with 2 forks. Put in tacos or on top of a tostada. Add cheddar cheese or feta (my favorite), cilantro, jalapeno's, etc. Enjoy.