1. A method for identifying a source of a copied work, comprising: obtaining at least some portions of at least one reference work; collecting at least some portions of said copied work; matching said copied work with said reference work, said matching comprising; temporally aligning one or more frames of said reference work and said copied work; spatially aligning the frames of said reference work and said copied work; and detecting forensic marks in said copied work by spatiotemporal matching with said reference work.