This is really cool, but I have a question. If we go back to using actual film does this help at all? I can imagine cameras and recorders for things like war capturing two copies; one digital, one film. If there are unfakeable or hard to fake artifacts in film one could imagine the recordings could validate each other. It would also make good insurance against cyber attack from illiberal governments.
Film can be "faked". Negatives can be modified. They're all chemical processes that can be coaxed into producing images that didn't exist when the photo was taken.