Block 370,434 (00100000000000000000000000000111) and (0x20000007)
- Yes: BIP9 says set top 3 bits to 001.
- No: BIP101 explicitly says set first, second, third and 30th bits to 1.
- No: No mention of BIP9 anywhere in BIP101.
- No: BIP9 was published after this block.
Block 398,364 (00110000000000000000000000000000) and (0x30000000)
- Yes: This is definitely compatible with BIP9, but not explicitly BIP9. It is mentioned in BIP109.