Throughout the Gospels and the Epistles the Old Testament is constantly confirmed. It is you who obviously has not read the New Testament.
"And concerning the resurrection of the dead, have you not read that which was spoken by God, saying to you: I am the God of Abraham, and the God of Isaac, and the God of Jacob?"
"Now that the dead rise again, Moses also shewed, at the bush, when he called the Lord, The God of Abraham, and the God of Isaac, and the God of Jacob; For he is not the God of the dead, but of the living"
"And beginning at Moses and all the prophets, he expounded to them in all the scriptures, the things that were concerning him."
"And he said to them: These are the words which I spoke to you, while I was yet with you, that all things must needs be fulfilled, which are written in the law of Moses, and in the prophets, and in the psalms, concerning me."
"Philip findeth Nathanael, and saith to him: We have found him of whom Moses in the law, and the prophets did write, Jesus the son of Joseph of Nazareth."
"For if you did believe Moses, you would perhaps believe me also; for he wrote of me."
And there are many more from the Gospels and from the Epistles.