How do we know that Christ fulfills Psalm 16?

Acts 2 and Acts 13 provide New Testament confirmation that Psalm 16 points to Jesus Christ. Peter's sermon at Pentecost makes clear that David's words in this Psalm cannot solely apply to him, as he saw corruption in death; however, Christ, who was raised from the dead, fulfills this prophecy. Paul echoes this in Acts 13, emphasizing that while David died and saw corruption, Jesus, as the Holy One, was not abandoned in death nor did His body see decay. Thus, indeed, Psalm 16 encapsulates the essence of Christ's resurrection and His provision of eternal joy for His people.