To address the "updated" part of the query, a robust metadata feature would track specific mastering versions (e.g., 1998 remasters vs. 2015 Hi-Res).
Iron Maiden has officially released their entire studio catalog in high-resolution formats, primarily through the 2015 Remaster campaign. These "Mastered for iTunes" (now high-res lossless) and "Hi-Res Masters" versions are available on major audiophile platforms. 💿 Available Hi-Res FLAC Releases iron maiden hires masters flac songs pmed updated