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There are so many technical hurdles to something like this, I don't see it as a solution anytime soon or ever.

It's not as far away as one might think.

There was a demo earlier this year (Jan) showcasing the proposed 1.0 spec working in Microsoft Edge: https://c2pa.org/jan-2022_event/

The browser side is not where all the hurdles occur. It's on the capture side and the key/certificate management/revocation side.