authenticated

Verb

authenticate (third-person singular simple present authenticates, present participle authenticating, simple past and past participle authenticated)

1. (transitive) To render authentic; to give authority to, by the proof, attestation, or formalities required by law, or sufficient to entitle to credit.
2. (transitive) To prove authentic; to determine as real and true.
   • He didn’t manage to authenticate the portrait: it’s probably a fake.

See all 3 meanings of authenticate