Leaked materials shared with 404 Media suggest that AI music company Suno assembled a vast training library by copying audio and lyrics from platforms including YouTube Music, Deezer, Genius, Pond5, Jamendo, Freesound, the International Music Score Library Project, and podcast feeds delivered through RSS. The hacker who accessed the company’s systems also claimed to have obtained user information linked to hundreds of thousands of Suno customers, along with Stripe-related payment data.