I think there might be a difference here between truth of a proposition and truth of a sentence.

Ascribing truth to a proposition looks the same as just asserting the proposition (deflationary account).

Ascribing truth to a sentence looks like a combination of mapping it onto a proposition (interpreting the sentence) and then asserting that proposition.

Since I would regard propositions and states of affairs as either the same, or isomorphic, this looks like the correspondence theory of truth for sentences.