> 
> Wrapped Bitcoin (WBTC) is the first ERC20 token backed 1:1 with
>  Bitcoin.
> 
> 
> 

So there must be a mechanism to lock BTC in the Bitcoin network and mint WBTC in Ethereum. I read about custodians and merchants which are part of that mechanism. So can I also swap BTC to WBTC, or actually this flow is centralised?