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Figure 2.11 System overview.

As seen in Figure 2.11, the Corda powered DLT network consists of several nodes including participants, validating notaries, and non- validating notaries. The smart contract and actual data are saved on the ledgers of the designated nodes only. The off-chain database is used to store only the credential data and it is made sure that no personal data is stored here. Corda has built-in KYC solutions to empower self-ownership, with the help of which, individual participants can log in to a node and control their user data independently. It is observable that there are three main participants, namely the client, the main contractor, and the subcontractor in this scenario. Each of these participants can visit the website through the internet, control personal data, and access the ledger. Although the portal used by these participants is the same, the actions performed by them are different due to the roles they play here. These roles are explained in the next section with the help of a working flowchart.