I'm interested in the technical question of how you got BIP34Hash and nMinimumChainWork
I will be glad if someone will tell
here's the story changes IBD check https://github.com/bitcoin/bitcoin/commit/ad20cddce2097c6561202777fccd257deb1a9810 BIP34Hash and BIP34Height https://github.com/bitcoin/bitcoin/commit/33c90cf197223fb95f858db80d090d570d70498a