I think the only difference between bitcoin in supply and bitcoin that has been mined, is the bitcoin that has been provably burned (sent to addresses that can be verified as unspendable).

If Larry Fink claims to have 30 million bitcoin, it doesn't change the supply in my book. So, I think when you run 

 on your node, it returns the actual circulating supply  as the 

bitcoin

bitcoin_beginners

Are there 20 million bitcoins yet?

Scoresby

I think the only difference between bitcoin in supply and bitcoin that has been mined, is the bitcoin that has been provably burned (sent to addresses that can be verified as unspendable). 

If Larry Fink claims to have 30 million bitcoin, it doesn't change the supply in my book. So, I think when you run `gettxoutsetinfo` on your node, it returns the actual circulating supply  as the `amount`.