There is so far no website for the convenient transfer you can use with the ARTIS <> Ethereum bridges, but that should follow soon.
When transferring coins / tokens over bridges, you need to make sure that you can access the used account address on the recipient blockchain. The simplest way is by using wallets which support both chains, so that you can see the token on the other chain right away. Recommended wallets are:
You have to send your ATS coins via a mediator contract to the xDai Chain and there you will get the xATS (ERC20) tokens. This xATS tokens will be received on the same address on the xDai Chain.
Send the desired ATS coins amount to the mediator contract at:
You have to send your xATS (ERC20) tokens via a mediator contract to the ARTIS Chain and there you will get the ATS coins. This ATS coins will be received on the same address on the ARTIS ∑1 blockchain.
Send the desired xATS tokens amount to the mediator contract at: