Some months ago I changed my preferred email address. I updated my profile in different sites to point to the new address, and changed my subscriptions in mailing lists.
I forgot about subscriptions to Debian bugs.
I like that you don’t need a “user” to participate in Debian BTS (you just need an email address) but I learned that there’s no way to get a list of the bugs you’re subscribed to (for mailing lists it’s possible: send mail to majordomo at lists.debian.org with which your.email.address in the body).
Then, I remembered that I’m listed in contributors.debian.org as BTS contributor, and that there is an “extra info” link, so I went there and got redirected to:
which lists all the bugs for which I sent an email (not only the bugs that I submitted). So now, I have a list of bug numbers to send -unsubscribe mails from my old address and then -subscribe mails from the new address.
I’m probably subscribed to some more bugs in which I didn’t participate (just lurking or interested in how people deal with them) but I suppose they are not many.
(I could have retrieved the list of bugs from the BTS interface, but contributors.debian.org came first to my mind, and it’s nice to have that link handy there, isn’t it?)