This is the oldest signature

(please post if you have a signature with an older address)
-----BEGIN BITCOIN SIGNED MESSAGE-----
1E9YwDtYf9R29ekNAfbV7MvB4LNv7v3fGa
-----BEGIN SIGNATURE-----
1NChfewU45oy7Dgn51HwkBFSixaTnyakfj
HCsBcgB+Wcm8kOGMH8IpNeg0H4gjCrlqwDf/GlSXphZGBYxm0QkKEPhh9DTJRp2IDNUhVr0FhP9qCqo2W0recNM=
-----END BITCOIN SIGNED MESSAGE-----
What's the meaning of the message? "1E9YwDtYf9R29ekNAfbV7MvB4LNv7v3fGa" is just an address with ~2mBTC. Could you sign another message? Preferably this one: "Today is December 4th, 2022, and I sign for topic #5421158". Also, money sent to "1NChfewU45oy7Dgn51HwkBFSixaTnyakfj" were paid in public key (block 1,018), so I'd expect a public key instead of an address. How did you end up with the address anyway (I've checked blockchair, and you're right; I just don't understand the point of this conversion).
Rather than signing dates, they should sign a hash of the block header that was mined 10 minutes ago. This proves it was impossible for a message to be signed by creating plenty of msgs or whatever. It's exciting seeing an early Bitcoin signature, thanks for the entertainment OneSignature.
this can be "fooled" too
if just adding a date..
the true owner of the 2009 address can at any time..
create a new chain. and put an epoch time in a sig of 1291513567 (dec 2009) and then just hash a block with low difficulty and reference that hash in a next signature message where by they pretend to have transferred it every 6 months for 13 years they can easily reference a previous hash of 26 taints previous hashes and pretend each are done 6 months apart by just adding 15778463 to the epoch time each time they sign.. even though reality is they done 26 signatures in one day
and boom. this new chain has a better provenance than this topics sigchain is pretending to have provenance of
thus making the sigchain proposed no longer valid