How does Odysseus prove who he is?

Odysseus proves his identity by revealing his knowledge of their shared bed, which he built himself, as a unique and intimate detail only he would know. When he returns to Ithaca and confronts the suitors, he also showcases his unmatched skill in Archery by stringing his bow, a feat no other man can accomplish. These actions confirm his identity to his wife, Penelope, and establish his rightful place as king.