With the challenges with misinformation and AI generated videos, photos and audio, Proton is in a unique position to leverage their development of pgp tools to integrate pgp signatures into the metadata for media. Similar to the preshared keys to validate (and encrypt) data with Proton's other products, this would be a video/photo feature of Proton Drive that would allow the signing of the photo with a pgp type signature. I'm not sure exactly how this would work given that pgp is file based but I think that Proton is well positioned to address verifying the chain of ownership for media.