De 25-jarige, geestelijk niet al te stabiele Catherine (Gwyneth Paltrow) heeft zojuist haar vader Robert (Anthony Hopkins), een briljant wiskundige, begraven. De laatste jaren van zijn leven was Robert ernstig in de war, en Catherine heeft zichzelf weggecijferd om voor haar vader te zorgen. Haar goedbedoelende maar opdringerige zus (Hope Davis) wil dat Catherine bij haar intrekt, zodat Catherine onder haar leiding haar leven weer op kan pikken. Catherine heeft echter meer aan de steun van Hal (Jake Gyllenhaal), één van haar studenten. Wanneer Hal in de paperassen van Robert een briljante wiskundethesis ontdekt, beweert Catherine dat zij die geschreven heeft.
Nee, helaas is Proof nog niet beschikbaar op Netflix in Nederland.
| Production | Alison Owen | Producer |
| Production | James D. Stern | Executive Producer |
| Sound | Stephen Warbeck | Original Music Composer |
| Camera | Alwin H. Küchler | Director of Photography |
| Production | John N. Hart | Producer |
| Production | Julie Goldstein | Executive Producer |
| Directing | John Madden | Director |
| Production | Jeffrey Sharp | Producer |
| Production | Harvey Weinstein | Executive Producer |
| Production | Robert Kessel | Producer |
| Editing | Mick Audsley | Editor |
| Production | Bob Weinstein | Executive Producer |
| Writing | David Auburn | Screenplay |
| Writing | Rebecca Miller | Screenplay |
| Art | Alice Normington | Production Design |
| Production | Kerry Barden | Casting |
| Production | Suzanne Smith Crowley | Casting |
| Art | Barbara Herman-Skelding | Set Decoration |
| Art | Keith Slote | Art Direction |
| Costume & Make-Up | Jill Taylor | Costume Design |
| Costume & Make-Up | Rebecca Lafford | Makeup Department Head |
| Production | Billy Hopkins | Casting |
| Costume & Make-Up | Charlotte Sewell | Costume Supervisor |
| Directing | Kim Armitage | Script Supervisor |
| Costume & Make-Up | Nicola Clarke | Hair Department Head |
| Art | Charmian Adams | Supervising Art Director |
| Sound | Mark Auguste | Supervising Sound Editor |
| Sound | Rebecca Gatrell | Music Supervisor |
| Art | Bruce Bigg | Property Master |
| Camera | Bill Kaye | Still Photographer |
| Production | David Pinnington | Location Manager |
| Sound | Peter Lindsay | Production Sound Mixer |
| Sound | Becky Bentham | Music Supervisor |
| Sound | Nyree Pinder | Music Supervisor |
| Writing | David Auburn | Theatre Play |
| Sound | Chris Baron | Musician |
| Sound | Sam Auguste | Foley Editor |
