#encoding

i was looking at the disc info for the spirited away blu‑ray and it shows a 720p30 stream encoded with h.264 baseline. everyone says ghibli sticks to 1080p60 prores for their releases. am i missing something or is the disc actually that low‑res?

• file size looks small for a full‑hd prores.
• playback on my 4k tv shows a blurry picture.

if anyone can confirm the actual specs, that'd help.