Another Steemian posted this answer: https://steemit.com/eos/@sandwich/how-to-check-which-eos-public-key-is-mapped-to-your-eth-address-with-myetherwallet-mew
Another Steemian posted this answer: https://steemit.com/eos/@sandwich/how-to-check-which-eos-public-key-is-mapped-to-your-eth-address-with-myetherwallet-mew
RE: How to know if your mapped EOS private key really works?