Bitcoin

 graph TD
    A((Participant 1)) -- Public Key --> B{Bitcoin Address 1}
    A --> C((Participant 2)) 
    A --> D((Participant 3)) 
    C -- Public Key --> E{Bitcoin Address 2}
    D -- Public Key --> F{Bitcoin Address 3}
    B -- Redeem Script --> G{Multisig Address}
    E -- Redeem Script --> G
    F -- Redeem Script --> G