“New code in iOS 27 beta 5 shows that the company is working on something called Apple Reference Image, which is designed to authenticate the source of photos using unique data tied to the iPhone camera hardware that captured them.”
The pitch is proving a photo came out of a real camera instead of a model. The mechanism is a fingerprint of your specific sensor, verified against Apple’s servers. Apple says only sensor data and metadata go back, not the image. It still means an authenticated photo carries a trace to the exact device that shot it. Useful for a newsroom. Also useful to anyone who wants to know who was holding the phone.