1. A method for identifying a source of a copied work, comprising: obtaining at least some portions of a reference work comprising a first plurality of image frames; collecting at least some portions of the copied work comprising a second plurality of image frames; spatiotemporally aligning the second plurality of image frames of the copied work with the first plurality of image frames of the reference work to achieve a spatiotemporal alignment of the first and second pluralities of image frames, wherein spatiotemporally aligning comprises: temporally aligning the first and second pluralities of image frames, wherein temporally aligning comprises phase correlation of a plurality of low-level image features of the first and second pluralities of image frames using a processor; and spatially aligning the first and second pluralities of image frames, wherein spatially aligning comprises mapping the first plurality of image frames into a coordinate system of the second plurality of image frames using the processor; and matching, with the processor, forensic marks in the copied work with forensic marks in the reference work using the spatiotemporal alignment, wherein the forensic marks comprise non-embedded forensic marks.