How do we know that Jesus is the fulfillment of Old Testament promises?

Throughout the New Testament, the apostles reference Old Testament scripture to demonstrate that Jesus is the fulfillment of God's promises. For example, Psalm 2:7 is quoted in Acts 13 and Hebrews 1, indicating God's declaration of Jesus as His Son and affirming His position in salvation history. Additionally, the resurrection of Jesus is pivotal, affirming His identity and role as the promised Messiah who was raised from the dead to establish God's eternal kingdom. This assures us that the entirety of scripture culminates in Christ, as historically recognized within Reformed theology.