Jay Z doing his Roc Sign aka: the Roc-a-Fella sign.
Jay Z began using the “Roc Sign” hand symbol to represent his Roc-A-Fella music label. The “Roc”, as in a diamond, which was also a double entendre for an album getting a Diamond award, meaning over 10 million sales.
In 2000, he released The Dynasty: Roc La Familia. The cover featured Jaz Z doing the Roc Sign
Jay Z, Kanye West, and Rihanna making the Roc Sign while performing Run this town at a 2009 benefit concert at Madison Square Garden for victims of 9/11