Sorry, I prefer a concise one page resume that tells me just enough that makes interested to want to learn more. Anyone can claim outcomes and metrics on a resume that can never be validated.
You don’t need to “validate” the outcomes and metrics on a resume. The usefulness of this content (or anything on a resume) is not in its utility as a test of character.
I like when people list outcomes and metrics. It gives me a starting point for something to ask questions about. Projects make for a lot better interview discussion topic than “skills: HTML, JavaScript, CSS […]”