Authenticate
/ɔ.ˈθɛn.tɪ.keɪt/
adjective
Of the same origin as claimed; genuine.
“The experts confirmed it was an authentic signature.”
Conforming to reality and therefore worthy of trust, reliance, or belief.
“The report was completely authentic.”
(of a Gregorian mode) Having the final as the lowest note of the mode.
Synonyms: credible, reliable, trustworthy, unfaked, bona fide, bonafide, genuine, real
verb
To render authentic; to give authority to, by the proof, attestation, or formalities required by law, or sufficient to entitle to credit.
To prove authentic; to determine as real and true.
“He didn't manage to authenticate the portrait: it's probably a fake.”