Hi, sorry for the late reply. In case it helps, or helps someone in the future, you need to make sure to pipe the output from wget to sha256sum:

wget --quiet -O - url.to.bitadr.org.html | sha256sum

(notice the " | sha256sum" after what you had above). This takes the whole file and sends it to be inputted into the sha256sum program, which will hash the file and give you the output (checksum).