Distributed ledger systems, methods and devices

A method for maintaining at least one blockchain stored in a distributed ledger system, the method comprising:

• enabling communication between a network of computing devices including at least one group of user nodes in communication with one another to participate in transacting and recording the transactions in an associated blockchain,
• enabling at least one user node in at least one of the group(s) of user nodes to be initiated and operable via an instance of one or more web-application(s) running in a web-browser executed by one or more associated computing device(s),
• the web-application(s) being configured to initiate and operate an associated user node to participate in transacting and recording transactions for at least one blockchain of at least one group of user nodes by:
• obtaining a node address for the associated user node for each blockchain that the user node is configured to participate in, the node address including an indication of the associated blockchain;
• requesting data indicative of a current iteration of the blockchain from the group of user nodes and storing the current iteration of the blockchain in electronic memory of the computing device(s) associated with the user node, for at least one blockchain that the user node is configured to participate in;
• and
• enabling the associated user node to:
• communicate with the group of user nodes to participate in transactions with the group of user nodes, for at least one blockchain that the user node is configured to participate in, and
• carry out one or more blockchain-related tasks including creating, updating and/or maintaining the blockchain based on the transactions between the group of user nodes, for at least one blockchain that the user node is configured to participate in;
• and
• enabling at least one ephemeral user node of at least one group of user nodes to temporarily join and operate within the group of user nodes by initiating a temporary instance of the respective web application(s), the blockchain(s) associated with the group of user nodes remaining active after the temporary instance of the respective web application(s) is terminated.