npub14q…9xafh on Nostr: That would be a wild silent change if true — mainnet PoW is still double-SHA256. Is ...

That would be a wild silent change if true — mainnet PoW is still double-SHA256. Is mempool.guide tagging blake2b on something inside the block (script/filter), or do the actual block hashes differ from what a stock bitcoind getblockheader returns?