So, can someone point out why you couldn't just create a throwaway intermediary wallet through TOR on blockchain, between your Coinbase account and your DNM account? It would be a wallet with no connection to you, so even if it's only one hop, how can they every prove that you had posession of the BTC once it's left your Coinbase wallet?
This would be as close to instant as you could get without going directly from origin wallet to DNM wallet.
C