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1. "Has proven" is the old traditional form of irregular verbing in the English language. Translates to Present Perfect tense.
2. However, "has proved" is now acceptable and frequently used today, a breakaway from tradition.
3. To prove, proven (p.participle) proved (past tense)
The choice is yours.
Corpus of Contemporary American English.
Where can I find COCA?
https://www.english-corpora.org/coca/ Like all corpora, you have to use it with caution, but it gives a rough idea of the frequency of the words and expressions you search for.
‘Proved’ is slightly more frequent in the COCA, with 28,341 records, against 21,519 for 'roven'. Still, I’d have thought there were contexts in which ‘proven’ was unlikely. ?‘You haven’t proven that’ sounds very formal for most situations.