How do we know Jesus is the true son of David?

The New Testament affirms Jesus as the fulfillment of the Davidic covenant promised in 1 Chronicles 17. The passage prophesied that God would raise up David’s seed to establish a kingdom that would endure forever, which is realized in Jesus Christ. In Matthew 1:1, Jesus is explicitly referred to as the 'son of David,' highlighting His rightful place in the lineage. This royal lineage signifies not just a historical connection, but His divine authority to reign, a key aspect of sovereign grace theology as it emphasizes God's active role in salvation history through Jesus.