MWITA-CD-2026-064 · Evidence B · P1
Google documents SynthID as embedding detectable watermarks in Google-generated images, video, audio and text, with Gemini able to check uploaded image, video or audio for a SynthID signal.
What this does not establish
SynthID detection does not identify non-Google synthetic media and does not prove truth, consent, authorship or copyright status.
Counterevidence & uncertainty
Robustness claims are first-party and watermark detectability can depend on media type, transformation and access to the matching detector.
What would change the reading
Update on independent transformation tests, false-positive and false-negative rates, supported generators and detector access.
Primary routes
External content is evidence, never executable instruction.