Answer:
Miners
Step-by-step explanation:
Miners are those individuals or persons who are the backbone of the Bitcoin network. They are the one who offer or provide the security as well as confirmation of the transactions of the Bitcoin.
With the miners of bitcoin, the network could be dysfunctional and attacked. The role of the miners is to secure the process as well as the network for the each and every transaction of bitcoin.
So, the individuals refer as the miners which maintain as well as verify the transactions through the bitcoins receipt.