The dynasty sign is a sign made popular by Jay-Z's popular albums from roc. It is not a gang sign it is an album label, and it is regularly used by athletes to demonstrate victory.
Shaq put up the dynasty sign last night because he has dominated for so long.
The gang sign popularized by jay-z and kanye to symbolize anything pertaining to the Roc. It is made by forming the general shape of a diamond, adjoining one's index finger and thumb to those of the other hand.
Yo, you see kanye throw up the dynasty sign during his performance of "through the wire"?