certify, testify, evidence, bear witness, demonstrate, manifest, take the stand, verify, authenticate, affirm, more...

deny, refute, contradict, disprove

affidavit, witness, affirmation, certificate, certification, attestation, attestor, attestation officer, attestation witness, more...

many, present, official, true, novel, particular, copy, worth, past, extant, early

bear witness to,   evidence verb,   bare witness,   witness; to invoke,   give evidence of,   to provide evidence,   can prove,   went to prove,   support and witness,   to be proof of