How to Verify Ledger signedMessage with "cardano-serialization-lib" or any other library?

Developers Cardano Integration
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1

Can I ask for the answer under the question I created on Cardano Stack Exchange portal?
I tried for really long time and failed with each approach. I will really appropriate the help.

https://cardano.stackexchange.com/questions/12774/how-to-verify-ledger-signedmessage-with-cardano-serialization-lib-or-any-other