Apple Unveils ‘Reference Image’ to Help Prove Photo Authenticity and Detect AI Edits

Apple has introduced a new feature called Apple Reference Image, aimed at helping users verify whether a photograph captured on an iPhone is authentic or has been digitally altered. The feature arrives as generative AI becomes increasingly capable of producing photorealistic images, making it harder to distinguish genuine photographs from AI-generated or manipulated content. Apple Reference Image is being introduced with the new iPhone 18 Pro and iPhone 18 Pro Max, as well as Apple’s first foldable iPhone Duo, running iOS 27. Apple has also announced support for Google DeepMind’s SynthID watermarking standard, which uses invisible digital watermarks to identify AI-generated or edited content.

Apple says Reference Image works through a new sensor in the iPhone 18 Pro’s Main camera that can sign every pixel captured by the sensor. Users first need to activate Reference mode before taking a photograph. The signed sensor data is then processed through Apple’s Private Cloud Compute to create an unalterable reference image, which acts like a “digital negative”. It can be viewed alongside the regular photograph in the Photos app, while APIs will allow compatible third-party apps to access Reference Images across iOS, iPadOS and macOS 27. However, the feature will not initially be available in some markets, including China and the European Union, because of regulatory requirements.