# BTC Anchor Notes

## Method
v1 anchors via OP_RETURN using the node wallet RPC flow:
- walletcreatefundedpsbt
- walletprocesspsbt
- finalizepsbt
- sendrawtransaction

## Payload
ASCII prefix (default "VM") + root bytes, truncated to standard OP_RETURN limits.

## Ops
Prefer testnet/signet during development, then mainnet with tight fee control.