Preheat your oven to 375°F (190°C).
In a small bowl, mix the softened butter with onion powder, garlic powder, and paprika until smooth and fully combined. Set aside.
Remove the chicken from the brine and pat it completely dry with paper towels. Discard the brine. Place the chicken in a roasting pan or baking dish.
Brush the chicken evenly with olive oil. Generously rub the poultry seasoning over the entire surface of the chicken, including inside the cavity.
Carefully loosen the skin over the breast and thighs using your fingers or the back of a spoon. Spread part of the compound butter underneath the skin, distributing it evenly. Rub the remaining butter over the outside of the chicken.
Place the chicken in the oven and roast for 1½ to 2 hours, or until the internal temperature reaches 165°F (74°C) in the thickest part of the thigh. If the skin begins to brown too quickly, loosely tent the chicken with aluminum foil.
Remove the chicken from the oven and let it rest for 15 minutes before carving. Serve with your favorite sides and enjoy.