I am meaning that you a party to a licensing agreement with WotC on the terms set out in the OGL v 1.0a.For clarification, being a "party" to the OGL v1.0a means that you've released content under it, right?
I'm not giving you legal advice.So something like this recent blog post of mine would count?
In that blog post, you purport to enter into a licence agreement with WotC in terms of the OGL v 1.0a. I can't say whether or not you've succeeded. Speaking purely as an anonymous commentator, and not giving any legal advice, you might check whether your declarations at the top of your blog really conform to the requirements that need to be met in order to enter into a licence with WotC in terms of the OGL v 1.0a.