authenticate
verb [ T ] uk/ɔːˈθen.tɪ.keɪt/ us/ɑːˈθen.t̬ə.keɪt/
证明…是真实的；确认…的真实性；证实
to prove that something is real, true, or what people say it is
They used carbon dating tests to authenticate the claim that the skeleton was two million years old. 他们利用碳年代测定法证明，这副骨骼有200万年历史的说法是正确的。