John 10:24 - 42

Clear proof of His identity was what the religious leaders asked of Jesus.  Jesus, in return, offered them the record of His teachings and actions as proof that He and the Father were one and the same.  The crowd immediately accused Him of blasphemy, but Jesus' response was to ask for one incident in which He did not accurately represent the Father.  His entire life proved the truth of His claims.  The people recognized this (though the rulers did not); and stated that while John - who baptized - never did any miracles, everything he said about Jesus had been proven true.