The memory contains a shadow ledger of transaction history related to the independent ledger of {HEAD ~ transaction history} stored on {TAIL ~ a remote communications unit} 
stored on
The memory contains a shadow ledger of transaction history related to the independent ledger of { HEAD ~ transaction history } stored on { TAIL ~ a remote communications unit }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL