Go to "w w w dot Dubcc dot com"

This website list the credits for hundreds of Rap albums, and some mixtapes depending on the artist. Register, then go to the message board labeled "The Vault" or use their search function.

This only works if you have the Artist Name and Song or the album you heard the sample in. For example if you're trying to I.D. the sample 50 cent used in "I Get Money", use to search feature, type in "Curtis" and search through the results.

Btw, the song "Contains elements from "Top Billin" (Robinson), performed by Audio Two"

Of course this site doesn't have everything but it will definitely help people out.

-Juice2020