Unclaimed Brands and Brand Stamping: Can Unaffiliated Sellers List ASINs?

Yes, you are correct. Unclaimed brands do not have the privilege of brand building tools such as 'brand stamping.' On the other hand, abusive brands still have access to brand stamping. This means that unaffiliated sellers can list ASINs under unclaimed brands, but not under abusive brands.

If Brand Registry (BR) is attempting to stamp GCORIDs, it would be necessary to investigate why these brands are unclaimed in the first place.