tl;dr: Apple is introducing Apple Reference Image on the iPhone 18 Pro, an opt-in camera mode that produces cryptographically verifiable photos proving an image came from a real iPhone sensor at a specific time. The system signs raw pixel data inside the sensor at capture, develops the image in Private Cloud Compute with publicly auditable code, and uses composite post-quantum signatures plus a revocation mechanism—without tying photos to a photographer's public identity, unlike C2PA-based approaches.