I don't know Norway copyright law, but DMCA really isn't the issue. This comes down to basic International music copyright. DMCA is just an enforcement mechanism in the US for that. Assuming this blog site is in the US and that's why you mentioned it, note that you are also liable for any punishments in your country of residence. Usually these are fines per download/stream which can easily total millions or billions of dollars for even just a few songs downloaded or streamed often.

That said, if your site doesn't catch anyone's attention, then it all comes down to if you want to risk being that one easy target that gets made an example of. If you're OK with that risk, then the most likely thing to happen is the blog host site will get a takedown notice and take down the post or ban you from the site. Unless the song is protected with logins or is hosted on an obscure site, it's likely not to take very long to find by either the blog host or the record company.

The only way to avoid this would be if you have a valid fair-use argument for why you should be allowed to keep it up. But note, the way fair use works in most countries is you're still breaking the law, it's just a defense, so you still may need to go to court to present that defense and lawyers are expensive.