The OS listed on the OTC comes from the DTCC and i
Post# of 36536
DTCC - FAQS: HOW ISSUERS WORK WITH DTC
https://www.dtcc.com/settlement-and-asset-ser...k-with-dtc
Investopedia - DTC
https://www.investopedia.com/terms/d/dtc.asp
OTC Markets - GNBT Security Details
https://www.otcmarkets.com/stock/GNBT/security