contentauthenticity.org
In short: Getting listed on Content Authenticity Initiative is free. Plan for about 10 minutes — it is a form plus links and assets you already have.
What they ask for: Apply as a company and accurately describe your tool C2PA or content-provenance tools and intended participation.
Apply as a company and accurately describe your tool C2PA or content-provenance tools and intended participation.
Open membership, but genuine participation is expected; directory may publish the organization name/logo and link.
Open the submission page on contentauthenticity.org and complete its form — that is the "Open submit page" link at the top of this page.
Open membership, but genuine participation is expected; directory may publish the organization name/logo and link.
Priority sets the band — this one is do first. Cost (free) and effort (quick) move it within that band, which puts it in the highest impact tier. The score orders a submission queue. It is not a measure of the site’s domain authority, traffic or quality.