All, per the OTC web site, the Transfer Agent handles the notification that shares have been increased / decreased for the company. It's handled by electronic transfer, so that usually is a 24/48hr turnaround at the latest that I know of in most companies that use electronic transfer, unless it is over the weekend, then it could be 72hrs.

Per the website:

Transfer Agent Verified
The Transfer Agent Verified Shares Program provides investors current and reliable share data. The program enables stock transfer agents to report their clients' share data, including authorized and outstanding shares, to OTC Markets Group on a regular basis via a secure, electronic file transfer. Share data provided by transfer agents is displayed on www.otcmarkets.com alongside a "Verified" logo, indicating the information is reliable and trustworthy. This data is also disseminated through OTC Markets Group's market data feeds to investors and broker-dealers.