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they are probably not.

banks always had their own trading platform + monetary system. fully decoupled from the economy. https://en.m.wikipedia.org/wiki/Dark_pool

there's no way they are making the system they own be subjected to mining proof and other shenanigans. it would be a very dumb move for no obvious advantage.

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Right -- and isn't massively energy inefficient? I think I saw an article crop up here recently that said a processing a single BTC transaction uses something like 5.8 times as much energy as the median US household uses in a day.

Why would banks do something so monumentally wasteful when they can trust each other?

I doubt they will include the same mining consensus rules. in other words, nothing different than what they have today + buzzwords.

New cryptocurrencies don't require as much energy to mine initially

You can set up the crypto to not raise difficulty. Even a CPU based mining could do the job then.

lol. they point to a bank of England, non peer reviewed, paper that suggest a distributed ledger system which the bank can control the value and supply via policies.

that's the exact opposite of how a distributed ledger should work.

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