"Coinbase is not a money transmitter" is a demonstrably false statement in violation of the Lanham Act, 15 U.S.C. § 1125(a)(1)(A). You can find Coinbase's registration with FinCEN as a Money Services Business at:

http://www.fincen.gov/financial_institutions/msb/msbstatesel...

Just search for Coinbase. They provided the address of their statutory agent in Delaware even though they're in San Francisco.