I did (I am the owner of the blog). The blog article is on www.claudiokuenzler.com - not on this kakoku URL. I have no idea why Hacker News would change the link to another domain. Maybe someone knows this?
Thanks for the hint! It may have been my error as well as I just discovered that copy cat URL before and blocked it. May have posted the copy-cat URL myself, who knows. Anyway I just posted a new submission with the correct link.
Our software does change links sometimes (it follows redirects and also uses the canonical URL when it finds one), but from the logs it doesn't look like any of that happened here.