Place the chicken breasts in the crockpot.
Pour the salsa over the chicken, ensuring it is well coated.
Add the rinsed black beans and corn to the pot.
Sprinkle cumin, garlic powder, salt, and pepper on top.
Stir gently to combine the ingredients.
Cover the crockpot with the lid.
Set the crockpot on low for 6-8 hours or high for 3-4 hours.
Shred the chicken with two forks directly in the pot.
Stir the shredded chicken back into the salsa mixture.
Serve hot, garnished with optional toppings.