OpenAI, Adobe and Microsoft are part of the Coalition for Content Provenance and Authenticity, which helped create C2PA metadata — a widely used standard for marking AI-generated content.

A trade group representing Adobe, Microsoft and the nation’s largest software makers previously opposed AB 3211 in April, calling the bill “unworkable” and “overly burdensome” in a letter to California lawmakers. However, amendments to the bill appear to have changed their minds.