I edited above that both busy.org and steemit.com were DDoS attacked, but some other sites worked and services using nodes directly such as exchanges were up.

steemd.com has been intermittently unreliable for months. Not related.


I can't really provide any except that I'm running a node and the logs show no interruption, and some people reported using chainbb.com. Possibly if there is a working chain explorer you can see blocks and transactions during that period although the timestamps aren't necessarily trustworthy in hindsight.