How do we know Jesus is the promised one of God?

Throughout scripture, Jesus is identified as the promised one, often referred to in the Old Testament as the Messiah who would come to redeem His people. For instance, in Matthew 1:21-23, the angel announces that Jesus will save His people from their sins, signifying His role as the long-awaited Savior. Furthermore, Jesus' baptism is accompanied by a divine proclamation from God, affirming Him as 'my beloved Son' (Mark 1:11). The entirety of scripture, from Genesis 3, where the first promise is given, to the fulfillment in the New Testament, presents a coherent narrative pointing to Jesus as the one who fulfills the covenant made with His people. His life, death, and resurrection serve as definitive proof of His identity as the Messiah.