Support C2PA

[EmDash00]

Describe the Feature

It has become increasingly important for users to be able to quickly verify the authenticity and provenance of digital assets like images and videos. The Coalition for Content Provenance and Authenticity (C2PA) has finalized their specification and released a JS API for interacting with C2PA manifest at contentauth/c2pa-js.

My proposal is that we add an icon, which when clicked, displays information regarding the provenance of an asset for all digital assets supported by C2PA.

Attachments

No response

Describe Alternatives

No response

Additional Context

No response

[n8fr8]

Great idea, and something I would love to help get done!

We have a great deal of experience with C2PA through our open-source work on ProofMode https://proofmode.org/c2pa and have implemented both verify/display and capture tools, for web and mobile.

[n8fr8]

Part of what needs to happen here is for the upload process to NOT strip the C2PA and other metadata in images and videos.

[surfdude29]

Is there a way to discard location and other privacy-sensitive metadata before upload while keeping other metadata that might be useful?

At the moment I think the app just discards all metadata:

social-app/src/lib/media/picker.shared.ts

Lines 12 to 16 in 798bf47

	export async function openPicker(opts?: ImagePickerOptions) {
	const response = await launchImageLibraryAsync({
	exif: false,
	mediaTypes: MediaTypeOptions.Images,
	quality: 1,

[n8fr8]

Yes, there is a redact function in C2PA that could be explored. That said, in some cases, the point of C2PA/Content Credentials is to actual show where and when a photo or video was captured.

That said, the client can detect if C2PA exists on the file, and in that case it will not strip the metadata. In all other cases, it will.

Another point, this is also about display C2PA credentials for generative AI images, since ChatGPT/Dall-E, Runway, Samsung, Gemini, and other genAI tools either already support it, or soon will.

[n8fr8]

Seems like some interesting/related topics happening here on current compression within the BlueSky network infrastructure: bluesky-social/atproto#2174