DJI can just add some mandatory firmware upgrade process that offloads your footage to the mothership, and 99.9999% will agree to everything without reading.
How would that work? I would imagine that any system to implement this would necessarily be something that AI tools could replicate, wouldn’t it?
Then you can check the signature using the company’s public keys.
If you make edits to it, the editing app will package the new metadata, edited photo data, the original signature, and sign it again.
Now you have a chain of “changes” and can inspect and validate its history. It works for video and audio too.
As long as the private keys aren’t leaked, there’ll be no way to fabricate the signatures.