On the new chain you must find the account that has deployed the dappservicex.cpp code. This can be found by asking a BP, a member of the community, or by checking the chainentry table on the liquidx.dsp contract and providing the scope of the chain_name used to register in the previous step.
With that you have 2 way mapped your DSP account name. On the EOS Mainnet, the DSP’s account has been linked to the new chain’s network. And on the new network, the EOS Mainnet’s DSP account has been verified.