California AI Transparency Act Operative August 2 — Five-Thousand-Dollar Daily Penalties

California's AI Transparency Act (SB 942/AB 853) became operative on August 2, 2026, applying to any covered generative AI provider with one million or more monthly California users. Covered providers must embed machine-readable provenance watermarks in AI-generated images, audio, and video (text is explicitly exempt from the watermarking requirement), offer users a visible AI-label option, and make a free public detection tool available. Violations carry penalties of $5,000 per violation per day — a scale designed to be material for large platforms but potentially existential for mid-sized AI vendors. The operative date's alignment with the EU AI Act Article 50 enforcement date is coincidental but creates a de facto simultaneous compliance event for global AI providers serving both markets.