content provenance and authenticity embedded digital signatures in video files with Sony PXW-Z300. sound files to follow?

[PCMsoundie]

Sony announced today a new camera which will 

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The most notable feature of the PXW-Z300 is its distinction as the world’s first camcorder to embed digital signatures directly into video files. This capability, built on the C2PA (Coalition for Content Provenance and Authenticity)

Sony PXW-Z300 a 1/2-inch chip camera for for news, sports, corporate, events, documentary, live programming, and reality shows. Let's be honest here only news or documentary would get a lawsuit maybe asking for original files in legal discovery or in criminal trial as subpoena. 

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The timing of this feature seems particularly relevant given the industry’s growing emphasis on combating misinformation with AI generated images and video and establishing content provenance. 

I wonder if this strive for content provenance authenticity would spillover to sound manufacturers like Zaxcom, Sound Devices, Zoom, Tascam, Diety being asked for in the field recorders adding embedded digital signatures in sound files. All the metadata now is just that metadata. The only way I can see it being an authentic timestamp and not changed later is to have a GPS-disciplined timecode stamp using Coordinated Universal Time (UTC) [instead of just time-of-day SMPTE timecode that was jam synced as is current industry standard] embedded digital signatures a sound file. 

[The Immoral Mr Teas]

Here's a BBC article from a year ago on the subject and tech:

 

https://www.bbc.com/rd/blog/2024-03-c2pa-verification-news-journalism-credentials

 

Interesting that it is involving the New York Times as well as the Ay-aye crowd. I haven't read it all yet but sound files could also be 'provenance marked' or stamped, as presumably many other forms of digitally packaged media.

 

We're probably naturally dubious in our game with it carrying the 'It's A Sony' mark with long memories of SCMS and other copy prevention tools with which they excelled (at selling extra boxes) but where see the likes of Open, Faces and Micro I'm pleased to see some of the others. It could be a good thing in many areas - such as in telling 'AIFU' and the like?

[PCMsoundie]

Doing some digging I see 

In beginning of 2020 when Sony's FX9 camera was released it had GPS module antenna built-into the handle. Which would record the GPS coordinated (latitude/longitude) into the video file. "geo-tagging" GPS is set to On by factory default. But that is only GPS not secure signature. 

 

In 2023 Q4 Sony had previously announced business users of the a7 IV would be able to add secure signatures to their images, and has said this capability will now be expanded to other models. 
Sony says it planned to add C2PA authentication via a firmware update for the a9 III, a1, and a7S III in 2024, signalling that the encryption hardware is already present in these models.

Nikon Z mirrorless cameras  use The digital signature system by the Content Authenticity Initiative (CAI).   Will we see encryption hardware for C2PA authentication in future sound recorders? with FPGA in 8-series I wonder if Sound Devices could actually add this via firmware anyway...?