Blockchain (chain view)
Blocks
(up to 5)
Initializing demo chain (mining a few blocks)…
Tip: if an earlier block changes (or is re-mined), subsequent blocks become invalid because their stored previousHash no longer matches the predecessor's hash — you must re-mine the later blocks to restore a valid chain.
How validity is determined: a block is "valid" only when (1) its own hash meets the current difficulty and (2) every previous block is valid and the stored previousHash matches the actual hash of the prior block.