The present invention relates to a two level crux chain platform with a Proof of History (PoH) for increasing security, robustness and/or verifiability of a blockchain includes a first initial block with a node assigned to an address of a shard, a plurality of following blocks comprising a new address for each of the following blocks generated using previous address and previous block head by a ladder swapping protocol, a record stream with a plurality of stream value and each stream value is a current record value hashed with a previous stream value and a blockchain server for storing a plurality of modules.