I am the owner of a record label, and I would like to know if I can also register on my label to publish my artists (and possibly also monetize our YouTube channel and SoundCloud).

Yes, absolutely. We have a label registration service whereby we then go out and register your label name with all of our hundreds of partners worldwide. Then, all of your future releases will be listed on online retailer sites (such as iTunes, Amazon, eMusic, etc.) as being under your label name, not Octiive. We will then send you monthly reports (broken down by artists on your label) showing all downloads and streams along with date, retailer, and country where the download or stream took place.  All sales are reported to SoundScan. We do monetize on YouTube and can on SoundCloud as well (though some artists opt out of those should they prefer to do that directly).