Ah yes make receiving Bitcoin unnecessarily hard and require accessing offline multisig signers just to receive
nostr:note152gpqk00f9hn4lyxldrlee703nqx5vkg79868kx4hrsykfxlvk3qtm272a
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It’s not even a guarantee.
You can sign the proof and destroy the wallet after. 🤷♂️
Yes but this isn't trying to make sure you can spend the money in the future, only that you're not making a fake address that simply encodes 32 bytes of data without actually being spendable -- i.e. it ensures you're not abusing bitcoin outputs in the particular manner Stamps and Citrea do it
I get it now.
I don't think this would make receiving harder than just pushing the Receive button. The wallet just has to sign a tx, that's very easy.
As for multisig wallets, it's the same: the devices belonging to the keyholders just do this when they generate their key, and they simply send the result (key+signature) to whoever's making the multisig. The multisig creation software includes the proof with the multisig address. Then whoever wants to send money to them just does what they do currently: scan a qr code or copy-paste the address (which includes the proof), and their wallet does the rest.
A clear downside is that it's harder to make a wallet when every time you make a pubkey you must also sign a message with it. But I don't think that makes it harder for the user, not even a multisig user -- they just click Receive (or Export Multisig Key) and their wallet does everything else.
Addresses would get longer but I'm not sure how significant of a drawback that is.