I spoke to a few people living in Iran, and they definitively confirmed that 100+ people died. They obviously don't have the exact number, so that 36,500 figure might be exaggerated, but there are more than enough videos online to verify the 100+ claim if you really want to.
If you're using the same domain for each of your email address, HIBP has a domain-wide search feature which is free (but you need to register to validate your domain)
> This feature is available in English for users in the US, Canada, UK, and Australia, and is being introduced gradually to ensure great performance and quality.
> This feature is experimental and is being introduced to the Firefox user base through a progressive rollout. It may not yet be available to all users.