What appears on Bitcoin:
- A standard Bitcoin transaction
BTC sent to a federation-controlled multisig address
- Often includes a small metadata commitment (via OP_RETURN) referencing the peg-in claim on Liquid.
What it proves:
- BTC has been locked on Bitcoin
A corresponding amount of L-BTC is issued on Liquid.
What is not stored on Bitcoin:
- Liquid transaction details
- Liquid addresses
- Confidential amounts or assets on Liquid
Is this okay with you then or no? The issue could be the opreturn for peg-ins, which is typically ~36–40 bytes.