{"note":"Pin this STH. Later call /v1/log/consistency?first=<this tree_size>&second=<later tree_size> to prove the log only grew (append-only). Verify the signature offline against responder_pubkey_b32.","spec":"https://emem.dev/spec.md#transparency-log","sth":{"algorithm":{"hash":"blake3-256","leaf":"blake3(0x00 || entry_hash)","node":"blake3(0x01 || left || right)","sth_preimage":"PreimageV1(\"emem.translog.sth.v1\"){1:u64_be tree_size, 2:root, 3:signed_at, 4:responder_pubkey}","tree":"RFC 6962 Merkle tree (lone nodes promoted, not duplicated)"},"log_id":"cfvys4rv62o3kxduhuzlx5bqavbcg5rofrhk56wh5gkeprrkwxaa","responder_pubkey_b32":"cfvys4rv62o3kxduhuzlx5bqavbcg5rofrhk56wh5gkeprrkwxaa","root_b32":"v4jutopv7gq2nicajxvdnxgjjgn4wjojvxarfn6mtkj4vza7gjra","signature_b32":"caywbg2rqdupeu4gq7qijkj4amjc2idcz67zz6fmu3urahihhmoowk7inygzo3eiaegejerqlzvu2jf4twjc6wx5gx7y7mwfwu2tsca","signed_at":"2026-10-13T21:13:25Z","tree_size":0}}