Why does the keystore contain the signature of the signed app

When i execute this command on my apk:

keytool -printcert -file CERT.RSA

If i understand correctly, i can see the SHA1 fingerprint hash (encrypted by the private key):

SHA1: 16:59:E7:E3:0C:AA:7A:0D:F2:0D:05:20:12:A8:85:0B:32:C5:4F:68

But when i do this:

keytool -list -keystore my-signing-key.keystore

the same SHA1 key will be shown:

android_key, Jan 23, 2010, PrivateKeyEntry,
Certificate fingerprint (MD5): B3:4F:BE:07:AA:78:24:DC:CA:92:36:FF:AE:8C:17:DB

I want to know why this encrypted hash is in my keystore. I thought that it only stores the private key, i read this here (https://developer.android.com/studio/publish/app-signing.html). Can someone enlighten me on this please?