Both forms are correct, but proved is more prevalent in recent style guides.

As one who is intimate with spelling should know, English has no unified body of spelling, grammar, or rules at all, therefore it’s very hard to say that one’s spelling is particularly incorrect.

Some day, irregular verbs in English will be completely getted ridded of!

It's HN policy not to editorialize the title. In this case, the linked article uses "proved".

Or phys.org editors? The HN guidelines suggest using the original title.