Comment 32 for bug 30910

The database still isn't exactly browseable, but you can see a little information about what has been submitted. On the launchpad page for checkbox https://launchpad.net/checkbox there are some answers, including https://answers.launchpad.net/checkbox/+question/26749 which points out

> For now, the user interface simply provides a list of the information
> each user has submitted using the hwtest application in order to
> make it accessible to the community. Here is the URL where [username]
> should be replaced with your own username:
>
> https://launchpad.net/~[username]/+hwdb-submissions

SO you can look at the list of hwdb submissions and satisfy yourself that at least they haven't been thrown away all these years.