Startup idea: API to verify media (real vs. AI-generated)

With the surge of AI-generated content we are currently witnessing, and recent misuses of this technology to influence people and spread misinformation, I think it would be interesting to build an API-based solution to verify if online media (pictures, videos) is real or AI-generated. This would ideally become the reference in terms of trustworthiness, and every media company would double-check the content before using it online. Anyone building this / any thoughts?