Abstract: Various systems and methods for imprinting a unique identifier on a semiconductor die are disclosed herein. Example embodiments involve receiving a substrate at a photolithography station, the substrate including a photosensitive layer and an area for forming semiconductor dies, forming circuits on the substrate using a photolithography mask, imprinting a unique identifier on each semiconductor die on the substrate using a digital photomask and removing the substrate containing the semiconductor dies containing the circuits and the unique identifiers from the photolithography station. In some embodiments, each unique identifier is associated with a unique record for recording characteristics of the substrate, of the semiconductor die and of the unique identifier. In some embodiments, the digital photomask includes dynamically-controlled pixels, controllable to define a unique pattern for each unique identifier. In some embodiments, the unique identifier is a two-dimensional code.