There is no 8k's in the OtcPink Tiers, but TYTN is a OTCPINK CURRENT INFO and they release Quarterly reports & Attorney Letters to keep investors updated, also via PR's and website there is company updates.
The bottom tier of the OTC market, OTC Pink is a speculative trading marketplace that helps broker dealers get the best prices for investors. OTC Pink has no financial standards or reporting requirements, but companies in this tier choose the level of information they provide to investors and may have current, limited or no public disclosure. http://www.otcmarkets.com/otc-pink/home
Stocks on the OTCBB and pink sheets do not have to fulfill minimum standard requirements to remain on the exchange. Sometimes, this is why the stock is on one of these exchanges. Once a company can no longer maintain its position on one of the major exchanges, the company moves to one of these smaller exchanges. While the OTCBB does require companies to file timely documents with the SEC,the pink sheets have no such requirement.