Office of Domestic Product Promotion Act - Establishes within the Department of Commerce an Office of Domestic Product Promotion to: (1) work with U.S. businesses to promote domestic products; (2) provide information and advice to them on benefits and incentives available for producing domestic products, including the award of federal procurement contracts and federal and state tax benefits; (3) establish a comprehensive publicly available database of businesses that use, sell, or would prefer to use or sell, domestic products; (4) develop tools and ideas on how to promote domestic products; and (5) coordinate with state governments to further the Office's performance of its duties.