Ep9000-cusa08809-00-sotc0000000000eu-a0100-v0100 — ((link))

This strongly implies this is an for a game or application.

: The aerospace and defense industries rely heavily on sophisticated and highly customized equipment. Codes like EP9000-CUSA08809-00-SOTC0000000000EU-A0100-V0100 enable precise identification and management of parts and systems, which is vital for safety, performance, and compliance with stringent regulations. EP9000-CUSA08809-00-SOTC0000000000EU-A0100-V0100

This is a or a version separator . In Sony's internal tools, 00 often indicates "no sub-iteration" or "default region mapping." Sometimes it denotes the disc layer (0 = single layer, 1 = dual layer). Here, it acts as a delimiter between the motherboard ID (EP9000) and the application ID (CUSA...). This strongly implies this is an for a game or application