You won't find Project 4K77 on Netflix, Amazon, or Disney+. You won't find it on a Blu-ray (except for bootlegs sourced from this very project). Because of copyright restrictions, the team cannot host the 50+ GB file on their own servers.
For the uninitiated, Project 4K77 is a fan-led, crowdsourced restoration of the original 1977 theatrical cut of Star Wars (Episode IV – A New Hope). The team didn't use Lucasfilm’s masters. Instead, they sourced genuine 35mm film prints from the late ‘70s, scanned them in 4K resolution, and manually cleaned up dirt, scratches, and color timing to match what audiences saw on opening night. project 4k77 internet archive
Because this is a grey-area fan project, it is not sold in stores. You won't find Project 4K77 on Netflix, Amazon, or Disney+