How it works
Non-custodial by construction. The mechanics differ by chain.
A vault the client signs alone, day to day, on every chain WYTYC supports. At succession, nothing moves until the solicitor and WYTYC agree there is cause to act, and even then, neither can act without the other. How that agreement becomes an on-chain action is native to each chain. It is not the same mechanism wearing three different logos.
The three chains
One vault. Three native mechanics.
The client signs alone for everyday use. At succession, the outcome differs by chain: on Bitcoin the funds move to the heir; on Ethereum and Solana control of the vault rotates to the heir and nothing moves at all.
IMPLEMENTED NATIVELY, PER CHAIN
Three chains, three outcomes.
Bitcoin - a spend. When death has been verified, a transaction moves the vault's funds to the beneficiary. The beneficiary's address is not fixed years in advance when the vault is set up. It is confirmed by the solicitor administering the estate at the point succession actually happens, then written into that transaction. The transaction can only be built with the solicitor's and WYTYC's keys together. The client's key alone was never able to authorise it.
Ethereum - a rotation. Succession here does not move the funds at all. Control of the vault passes to the heir, who then holds and decides what happens to what is inside it. Because this uses a cooling-off period rather than an instant handover, the client has a direct route to cancel a wrongly triggered succession before it completes.
Solana - also a rotation. As with Ethereum, nothing moves. A single instruction removes the original signers and installs the heir as sole controller. The underlying mechanics differ from Ethereum's, but the outcome for the client is the same principle: control passes, and custody was never WYTYC's to give up in the first place.
Verification
Knowing the trigger has actually fired.
Knowing that a death or loss of capacity has genuinely occurred is the hardest question a system like this has to answer. WYTYC's answer is not to trust any single source. Several independent signals feed the decision, and no one of them is ever enough to act on alone.
Activity
An on-chain heartbeat the client can reset at any time. A long silence raises a flag. It never starts anything on its own.
Identification
An automated check against independent deceased-identification sources, designed to corroborate rather than to decide. No single source is authoritative, and none can trigger a path alone.
Solicitor
Confirmation from the firm of record, against the death certificate and the Grant of Probate. This is the authoritative human layer.
No single signal is ever sufficient. The architecture requires agreement.