Subnostr

Not necessarily. It just proves the authenticity of the signed message.

The message content to sign should be given as a challenge to the person signing to prove ownership.

What do you mean not necessarily?

So leanmeabitcoin.com is wrong?

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Blockchain is full of signed messages. You can pick any and try to claim that you own it.

But if they ask you to sign a challenge again you can't. Because you don't have the private key.

I believe CSW pulled a trick like this 😂

How do you sign it?

#[8] give python code for signing a message with Bitcoin private keys

What are block chain wallet ids?

What do they have to do with bitcoin wallets?