A closely watched piece of AI regulation has come into force. California’s SB 942 became operative on August 2, requiring generative-AI providers with more than one million monthly users in the state to embed tamper-evident, C2PA-compatible provenance data into the images, video and audio their tools create.
The law is designed to make AI-generated media easier to identify, part of a broader push to combat deepfakes and misinformation as synthetic content becomes harder to distinguish from the real thing.
Because so many of the world’s largest AI companies operate in California, the rule’s practical reach extends well beyond the state’s borders — potentially setting a de facto standard for how provenance is handled across major consumer AI products.
Supporters say provenance labelling is a necessary step toward trust and accountability online. Critics question how effective invisible watermarks will be in practice, and whether determined bad actors can simply strip the signals. Either way, the law marks one of the most concrete attempts yet to govern generative AI at scale.
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