This is the oldest signature 
(please post if you have a signature with an older address)
(please post if you have a signature with an older address)Quote
-----BEGIN BITCOIN SIGNED MESSAGE-----
1E9YwDtYf9R29ekNAfbV7MvB4LNv7v3fGa
-----BEGIN SIGNATURE-----
1NChfewU45oy7Dgn51HwkBFSixaTnyakfj
HCsBcgB+Wcm8kOGMH8IpNeg0H4gjCrlqwDf/GlSXphZGBYxm0QkKEPhh9DTJRp2IDNUhVr0FhP9qCqo2W0recNM=
-----END BITCOIN SIGNED MESSAGE-----
1E9YwDtYf9R29ekNAfbV7MvB4LNv7v3fGa
-----BEGIN SIGNATURE-----
1NChfewU45oy7Dgn51HwkBFSixaTnyakfj
HCsBcgB+Wcm8kOGMH8IpNeg0H4gjCrlqwDf/GlSXphZGBYxm0QkKEPhh9DTJRp2IDNUhVr0FhP9qCqo2W0recNM=
-----END BITCOIN SIGNED MESSAGE-----
signature chain
Quote
-----BEGIN BITCOIN SIGNED MESSAGE-----
1KN59gRxD8G9g9smSLTFt9aSgWxYxTzFL7
-----BEGIN SIGNATURE-----
1E9YwDtYf9R29ekNAfbV7MvB4LNv7v3fGa
HwvtQmiREYIyZeI9uohqr82d9eiwtcBgbhG5+VR7+ouEDOTgd6EYvcgNQVELLVJnQbYhN6SSv1xPtQ8SmIa10+U=
-----END BITCOIN SIGNED MESSAGE-----
1KN59gRxD8G9g9smSLTFt9aSgWxYxTzFL7
-----BEGIN SIGNATURE-----
1E9YwDtYf9R29ekNAfbV7MvB4LNv7v3fGa
HwvtQmiREYIyZeI9uohqr82d9eiwtcBgbhG5+VR7+ouEDOTgd6EYvcgNQVELLVJnQbYhN6SSv1xPtQ8SmIa10+U=
-----END BITCOIN SIGNED MESSAGE-----
"Signature chain" isn't a thing. It just means you can't sign a recent blockhash so you do not own any old addresses, you are just reposting old signatures you saw somewhere.