If you find a file labeled Oceans.Twelve.2004.1080p.BluRay.H264.AAC-RARBG , check these details via MediaInfo:
This file is a high-quality "scene" encode from the late 2000s/early 2010s. It is not a 4K remux, but it is likely a "transparent" encode—meaning you would struggle to see the difference between this and the original Blu-ray on a standard 42-inch TV. Oceans.Twelve.2004.1080p.BluRay.H264.AAC-RARBG