GitHub, under continuous watch.

Five domains carry GitHub: the front door, raw file delivery, Pages, the asset host, and the status page. As of August 22, all five are under continuous watch at about a 5-minute cadence. Each reading is signed at the moment of observation, and every line on this page links to its receipt.

Two of the five publish no web page at their apex. Their DNS still routes traffic for millions of fetches a day, so the watch covers them the same way. The window since the watch tightened has been quiet: no nameserver, registrar, or certificate-authority movement across the estate.