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.
| Camera | Alwin H. Küchler | Director of Photography |
| Production | Robert Kessel | Producer |
| Sound | Stephen Warbeck | Original Music Composer |
| Directing | John Madden | Director |
| Production | James D. Stern | Executive Producer |
| Production | Harvey Weinstein | Executive Producer |
| Production | Julie Goldstein | Executive Producer |
| Production | John N. Hart | Producer |
| Production | Jeffrey Sharp | Producer |
| Production | Bob Weinstein | Executive Producer |
| Editing | Mick Audsley | Editor |
| Production | Alison Owen | Producer |
| Production | Billy Hopkins | Casting |
| Art | Keith Slote | Art Direction |
| Art | Alice Normington | Production Design |
| Art | Barbara Herman-Skelding | Set Decoration |
| Production | Kerry Barden | Casting |
| Costume & Make-Up | Jill Taylor | Costume Design |
| Costume & Make-Up | Nicola Clarke | Hair Department Head |
| Costume & Make-Up | Charlotte Sewell | Costume Supervisor |
| Directing | Kim Armitage | Script Supervisor |
| Production | Suzanne Smith Crowley | Casting |
| Costume & Make-Up | Rebecca Lafford | Makeup Department Head |
| Art | Charmian Adams | Supervising Art Director |
| Art | Bruce Bigg | Property Master |
| Sound | Peter Lindsay | Production Sound Mixer |
| Camera | Bill Kaye | Still Photographer |
| Sound | Mark Auguste | Supervising Sound Editor |
| Writing | David Auburn | Theatre Play |
| Writing | David Auburn | Screenplay |
| Writing | Rebecca Miller | Screenplay |
| Sound | Nyree Pinder | Music Supervisor |
| Sound | Becky Bentham | Music Supervisor |
| Sound | Rebecca Gatrell | Music Supervisor |
| Production | David Pinnington | Location Manager |
| Sound | Chris Baron | Musician |
| Sound | Sam Auguste | Foley Editor |
| Costume & Make-Up | Tracey Lee | Makeup Artist |
| Sound | Ruth Sullivan | Foley Artist |
| Sound | Tim Cavagin | Sound Re-Recording Mixer |
| Sound | Daniel Laurie | Dialogue Editor |
| Sound | Daniel Laurie | ADR Editor |
| Camera | Olly Tellett | Focus Puller |
