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The "Blockchain" technology is gonna become crucial in the future of AI and Deepfakes.
Since videos, and especially still images can be faked. They would be treated just like witness testimonies, evidence that can be falsified.
What I think will happen is that people would have to use live internet connection to verify a video.
So what happens is that whenever a video is recorded, there will be a "blockchain verify" feature in the camera settings, when enabled either the video feed or the hash of the packets of video data is sent to a blockchain network where it gets timestamped and stored permanently on the blockchain.
The network would consist of various nodes that ideally aren't government run. Think like the ACLU, EFF, or Journalists, or people who independently want to join the network. Each would run their own node independently.
So any time theres suspicion that a video may be faked, the courts can just ask the network to send their own copy of the blockchain, if theres a consensus, then the video can be proven to have been created at the time that is timestamped. So there's no way of creating a fake video evidence after an incident since you wont have the timestamp on the blockchain.
How does this protect the blockchain from someone just uploading hashes of AI generated video though?
It doesn't prevent every falsification. It makes it much harder.
Say the incident is a car crash. And assuming dash cams also get this blockchain feature. The car crash already happened and you cant fake a video afterwards that make it look like the other person hit you first. And if you try to preemptively fake a video, you cant know every possible roads, roadsigns, nearby cars, or what vehicle the other person is driving, basically you cant predict everything that was on the scene before the incident occurs.
Imagine if you hit a truck at 5 PM heading west on Road 27 and on the intersection on Road 52. You'd have to know beforehand the road that the incident will occur on, the position of the sun (its 5PM and you're heading west, remember), the road signs, how wide the road is and how many lanes, the fact that the other vehicle is a truck, what the truck looks like, etc.
I mean you have to create so many fake vehicle collision videos then when an incident happens, you'd have to hope one of the ones you faked matches the situation, then quickily find the video and send it to the blockchain.
Not to mention, the other person could have a dashcam video without any discrepencies. And any slight discrepency on your faked video would make court believe the other recording more than yours.
I mean its not impossible fake something. But its hard to do it before something happens.