Why was this so rarely used as of 2020s compared to ISBNs? It would have been perfect for helping find obscure records from Chinese traditional music and Indian classical music!
But instead we have Discogs, which is not too bad.
It is interesting how the Etyptian level, Shifting Sand Land, clearly has Indian classical music, with sitar, tanpura and tabla:Apparenty we don't know what Egyptian music would have sounded like exactly.