They have you choose a default certifying authorit
Post# of 22456
http://imgur.com/a/lOkoZ46
The "Austin Public Health" option may be a testing location, but the others, "Prescott University" and "Tyrell Industries" may appear to be actual businesses. Perhaps these are businesses that will adopt QDX Health ID? I am not sure.
After choosing a certifying authority, it brings you to a page where you digitally sign your signature. I didn't go beyond this page, because I wanted to look more into these certifying authorities. I would assume you would get an email after the signature process is complete.
Info on certifying Authorities provided on the QDX Health ID App:
Austin Public Health:
https://www.austintexas.gov/covid19
https://www.austintexas.gov/department/health
Tyrell Industries: I wasn't able to find much about this company. I found this, but this could be unrelated. UK based?
https://opencorporates.com/companies/gb/07422292
Prescott University:
I also couldn't find much information on this.
If anyone can find more information on the last two companies, that would greatly be appreciated.