Question/Advice

How can you tell whether a producer's beats you find online are legit and not a scam? I have connected with some producers on here, which has been good. However, I found some beats online (YouTube, SoundCloud, etc.) and I like them, but I am skeptical of paying for a license especially if I don't know whether it is legit or not. Any advice or tips will be helpful as I am eager to write and record as an aspiring rapper. Thank you I'm advance✌️