The strange case of a signature which does the opposite :-)

Hi! ????

A little ECDSA riddle:

I've created a Bitcoin-signed message that proves I do NOT have the private key

Not only was it created without the private key, but the message also proves I've never had access to the private key for the address 1JHHFnsHw9S9ZugWDDZxkwQCjX7J2kNEJf.

How did I do this? ????

Message:

With this Bitcoin signed message, I, wauzibauzi, affirm that I do NOT possess the private key for the signing address. This isn't just a claim - this signed message cryptographically proves it beyond any doubt. I created this signature on my own, yet it is impossible for me to know (or to have ever known) the private key of the signing address below. The statement above is true, and this signature is valid. Feel free to verify it yourself in any Bitcoin wallet or using online tools such as: https://tools.qz.sg/ (Recent block hash #865794: 00000000000000000002c2ab6cf80aa2bb20c4587231fb693791c0b3477b68df) 

(no newline at the end)

Signing address:

1JHHFnsHw9S9ZugWDDZxkwQCjX7J2kNEJf 

Signature:

H1RoZSBzdGF0ZW1lbnQgYWJvdmUgaXMgdHJ1ZSwgYW5kIHRoaXMgc2lnbmF0dXJlIGlzIHZhbGlkLiBGZWVsIGY= 

Feel free to check yourself, the signature is valid. :)

https://preview.redd.it/inddh9671zud1.png?1738&format=png&auto=webp&s=236ee06db905678edde15d622cb4f19dd73f0f29