{"type":"external_stamp","verified":true,"merkle_root":"bc176416850cb553a26cb18e07819dace1bc11a47824bbfcdff4a324cfcf5c2e","data_hash":"afc36a93a9495dc3f4e0d062dc92666ce5e740498f301ac97efb0e6ed96ce32f","wallet":"135nd7CXWJ8QRjuCDkXoM5oxx9MKc7YNjN","zk_commitment":"[\"21031710265009899230268809143026115582937180842794097701421733253021222060077\", \"19776220533244639558178626504381943927697240548044500504679234563942622608521\"]","block_height":134207,"label":"A2A demo artifact 36102783","stamped_at":"2026-06-28 21:15:19.310008+00:00","anchor":"merkle root recorded + Pedersen commitment; permanent, chain-recorded","note":"Public COMMIT. Proves the data was committed at this time (provenance), not that it is correct."}