That search engine you mention or a global Database of Twt hashes could help. I remember that Twitter users had an external search platform, acquired later by Twitter: https://techcrunch.com/2008/07/15/confirmed-twitter-acquires-summize-search-engine/
As @email@example.com said, a comment in the txt file like: Notify me on this email, or automatically register your feed in this URL as Antenna does, would be a nice addition. I assume that if you are replying you are interested in making a dual connection, so they can answer you back. Just thinking out loud.