Google’s SynthID watermark just debunked its first high-profile deepfake: a hoax image of Mitch McConnell

TL;DR

Google’s SynthID watermark debunked a viral fake image of Senator McConnell in hospital. The watermark survived screenshots across platforms. First major real-world win.

Google’s SynthID watermarking system scored its first high-profile real-world win this week after Snopes used it to debunk an AI-generated image of Senator Mitch McConnell that had gone viral on Reddit and X. The image, which appeared to show McConnell covered in tubes in a hospital bed in extreme distress, was confirmed as AI-generated after Snopes detected the invisible SynthID watermark embedded in the file.

McConnell’s health has been the subject of intense speculation since he was hospitalised after an emergency call on June 14. He has been largely absent from the public eye since, fuelling speculation. In this case, the evidence was entirely fabricated, and the watermark worked exactly as designed.

SynthID, launched at Google I/O in 2025, embeds an invisible signature into AI-generated images....

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