More context would be helpful, but probably the best translation would be "Es verdad".

también hay otra opción, puedes traducirlo como: es cierto

Ashly, something similar to me when I as learning English with the word True and Truth The equivalent of True in Spanish is True (verdadero) and is adjective, on the other hand Truth (Verdad) is a noun therefore you can use both of them to convey the same idea, but when u use True, there should be a noun to which the adjective is applied to