It's all OTC isn't it? Lowest Tier is OTCPink, Middle Tier is OTCQB
OTC Pink
The Speculative Trading Marketplace
OTC Pink is the third tier of the OTC market. OTC Pink is the speculative trading marketplace that has no financial standards or reporting requirements. OTC Pink companies choose the level of information they provide to investors and may have current, limited or no public disclosure.
OTCQB
The U.S. Reporting Company Marketplace
OTCQB is the middle tier of the OTC market. OTCQB companies are reporting with the SEC or a U.S. banking regulator, making it easy for investors to identify companies that are current in their reporting obligations. There are no financial or qualitative standards to be in this tier.