Tbh I almost missed sigh "sihy."

Imo there isn't one discreet thing that gives @Bardic_Muse away, but -- as is ususlly the case with ai -- a few things are off:

• poem is bad
• thats my handwriting (kind of)
• non-words
• block height was almost 20 blocks behind - a human probably wouldn't have waited that long before posting (though it is possible)

Overall the feel is of a computer "trying" hard to pass as human