

That is definitely one way to do it, but it does get messy from the services side, every service needs to support a few thousand jurisdictions. It’s also basically the notary system the OP described.
We have mygovid here on Aus, but there is a lot of distrust given its a “big government” ID system… It doesn’t do age verification though, but it would be suitable for it


https://www.bunnings.com.au/craftright-ear-muffs_p0401332
Like that? Hearing protection. I know some people wear them in public to avoid overstimulated.