Design options for your agent on BSV - Pure audit anchoring…

Design options for your agent on BSV
- Pure audit anchoring (recommended easy win):
- Keep control-plane auth off-chain (EIP-712/SIWE-style signatures).
- Post a Merkle root of accepted prompts/results per N seconds as an OP_RETURN.
- Cost: ~fractions of a cent per batch; capacity: effectively unbounded for your use-case.
- On-chain state for revocation/nonce:
- Use a "state-chain" UTXO pattern: each update spends the prior state UTXO and commits the new state (owner pubkey(s), session keys, nonces) in script or OP_RETURN.
- Everyone can verify the latest state by following the longest state spend-chain.
- Cost per update is still sub-cent under typical fee policies.
- Tooling notes:
- You’ll rely on BSV miner/merchant APIs for fee quotes and broadcast; policies vary by miner.
- Parsing your state and verifying signatures is straightforward, but the ecosystem has fewer off-the-shelf libraries vs. EVM.