On this article about Sporting Event TFRs on the Flight Service website, they mention unpublished TFRs:
Play Ball! Be Aware of Sporting Event TFRs June 26, 2016 when you ask the specialist for TFRs along your route of flight or request an online briefing, you may expect the specialist to provide unpublished TFR information that is not associated with the “blanket” sporting event TFR. Ensure you check your route of flight for the possibility of a Sporting Event TFR or published TFR.
What is the difference between a published and unpublished TFR?
From the article I would infer that Sporting Event TFRs are considered published, but I don't think they are published anywhere else but in the NOTAM. Appearing in a NOTAM is not considered as being published, right?
Where are the published TFRs being published now? NOTAMs used to be published in Notice to Airman Publication (NTAP). But, from these notes on the FAA website it seems that NTAP is being retired. So, where would the NOTAMS be published moving forward?