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9f93d9c0c5
Adds Sony to _DEVICE_C2PA_PLATFORM, matching Sony's own `sony.sig` / `sony.cert` C2PA assertion namespace (NOT bare "Sony", which is a common EXIF Make). Verified against a real Sony-signed file (Sony PXW-Z300, signer "Sony Corporation") found in the Security4Media/c2pa-video-player repo. The sample is video (MP4) -- our ISOBMFF C2PA path detects it; Sony Alpha stills likely share the namespace. Verified device set is now Leica, Nikon, Google Pixel, Sony, Truepic. Canon / Samsung / Bria still have no public direct-download C2PA sample to verify. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>