When snapping a photo, couldn't a phone produce a hash with date/time/location included? I understand it's not bullet-proof, but at least it would make it possible to verify the original to some degree.
Maybe at some point this will also trickle down to smartphone cameras. Though with the tiny sensors mandated by the smartphone form factor there is always a lot of preprocessing going on, and it's hard to draw a clear line between just clearing up the sensor data and simple beauty filters. But the examples in the article seem pretty clear cut
https://leica-camera.com/en-int/photography/content-credenti...
However, clever people figured out to break it. [1]
[1] https://www.usa.canon.com/support/canon-product-advisories/a...