Peter R, what if scBTC#1, scBTC#2 and scBTC#3 is still same BTC and has equal value in all chains b/c 2wp works ?
Transfering BTC from chain to chain is only "thought experiment". I have never seen or touched Bitcoin -> b/c it is only private key.
I'm just trying to make incremental progress in my understanding by answering the question "on which ledger is the value stored?" The probability that the 2-way peg is severed is a different discussion.
I think it's clear that value is stored on both Bitcoin's Ledger and the Sidechain's Ledger. Erdogan phrased this succinctly:
I think, that value is always stored in MC. You can only put your bitcoins into "escrow" (lock them in main-chain) and use "value" on side-chain.