Need advice on bleaching a couch.

[Stormrush]

Hello. I'm new here and would love any advice on a project I'm about to do. My wife has a photography studio, the main colors are black and white. A few days ago a consignment shop next to us went out of business. They had this antique looking couch my wife loved. I got it for her. Now the project: I can't tell if it's turned dingy due to it's age, or if it was a off white color to begin with. So I'm interested in bleaching this couch a gleaming white. Any idea or recipes? Thank you in advance!