"A very essential service for American culture and world culture," says graphic artist Tim Fielder ... of the architects of hip hop. “I’m very proud of it,” says Fielder.

Yep, he designed that one, too. Graffiti Black's stamp of graphic approval appears on everything from business cards and album covers to T-shirts and fliers. A brand ambassador of sorts ...

SEE ALSO: 40 years of hip hop mashed into one song is legendary ... all you have to do is click the play button on the "O" in the graphic. It then takes you to a "record crate" where you can ...