We are currently live with GBP and EUR implemented as ERC20 token-contracts on the Ethereum mainnet.
We provide daily and ad-hoc proof-of-funds – these are account statements digitally signed by the credit institution holding the collateral.
GBP: https://etherscan.io/token/0xff4f56c14b8b59f7d766988a0e0c582e46b7f8ab
EUR: https://etherscan.io/token/0x8e3aEb75392ca824d55479CaE07f7f0B765743DD
The underlying Solidity code is open source.
Our solution is flexible with respect to underlying protocol and token standard.