The signed message is invalid.
I imported your privatekey, verified that your fingerprint matched the value posted in this thread.
I then verified the signed message, which returned as an INVALID signed message from satscraper_new@mail
Attached is a saved screenshot from every step mentioned, please note my layout is in Danish.
I've removed the commands from the screenshot, so others just can't copy

<blockquote class="imgur-embed-pub" lang="en" data-id="a/zhM3Hm3" data-context="false" ><a href="//imgur.com/a/zhM3Hm3"></a></blockquote><script async src="//s.imgur.com/min/embed.js" charset="utf-8"></script>