verb (past participle proved or proven /ˈpruːv(ə)n, ˈprəʊ-/)
Middle English: from Old French prover, from Latin probare 'test, approve, demonstrate', from probus 'good'
For complex historical reasons, prove developed two past participles: proved and proven. Both are correct and can be used more or less interchangeably (this hasn’t been proved yet; this hasn’t been proven yet). In British English proved is more common, with the exception that proven is always used when the word is an adjective coming before the noun: a proven talent, not a proved talent.