Osiris multisig escrow, mechanically
Osiris settles every order through a 2-of-3 multisig signing path. Here is what the scheme buys you, why it matters structurally, and what it changes in your workflow.
Multisig escrow is the structural property that separates a market you can run orders through with reasonable confidence from one where the operator can drain the float and disappear. Osiris wires 2-of-3 multisig as the default settlement contract on orders.
What 2-of-3 means at the protocol level
Three keys are provisioned per order: yours, the vendor's, and the platform's. Funds leave the escrow address when any two of the three sign the release. In the normal path you sign on receipt and the vendor counter-signs, with the platform key idle. In a dispute the platform key becomes the deciding signature and signs alongside whichever party the arbitration queue rules for.
The protective property follows directly: a platform that wanted to exit would have to convince a quorum of vendors to actively co-sign their own losses, which does not occur in practice. Under single-sig escrow an exit is one unilateral platform call. That delta is the entire reason the scheme is worth running.
What it changes in your workflow
Almost nothing at the UI layer. You submit orders the same way and the multisig contract executes in the background. You only observe it on dispute, where the queue's ruling is binding because the platform key is the tiebreaker. For the buyer bring-up flow, read the access procedure.