While specific "deep guides" for this exact string are not found in public mainstream databases, the components suggest the following: : Likely the featured creator, performer, or artist. "When Shaman Calls"

I tucked the note in my pocket as if it could be used later. I began to catalog the coordinates I learned: 05 03 by the river, Lia Lin’s photograph in a second-hand bookshop, XXX scrawled on a doorframe, the shaman’s knock that sounded like a metronome for undone things. The tape had given me a language to find what had been quietly given up. It asked nothing but attention in return.

When a user interacts with a shaman character (like Lia Lin), there's an option for the shaman to provide a selection of the "best" four outcomes or choices related to a specific task, quest, or decision.