{"format":"touchstone-inclusion-proof\/1","recorder":"rec_01kvx9rq59jmsc01n7vkb3z35h","max_sweep_seconds":null,"entry":{"seq":623,"event_type":"memory.attestation\/f1121a","payload_hash":"76c76d9540fdb030b475c62d660c2517fd939ad9b17d7400d778d431a0601e3d","prev_hash":"70f57b8154c83943a575ee7f8251b96195205e5701100cd4fb16f6029d10e0b8","server_ts":"2026-10-20T15:36:49Z","client_ts":null,"actor_sub":"040b6f79-a867-46d4-8069-fd6143bd9e20","counterparty_sub":null,"counterparty_sig":null,"counterparty_pubkey":null,"actor_sig":"DltogYxVqy1UNWOROnMG+L\/1j2ttiXJJMxEzQRjXRDUA5xNQwhGOfJcpAhl7XRW9D+2d8ePZbAQ8KcIbwr6DAw==","server_beacon":{"chain":"drand:quicknet","round":33235748,"randomness":"a3f3f952f3841c829781c021fe09188b873c3894e880b23bd1ab2196c7b8b53e"},"entry_hash":"f06063f7b50aab88835e29c3030881958013c2dec2da694c36d0fc3397a189c6"},"inclusion_proof":[],"checkpoint":{"id":984,"seq_start":623,"seq_end":623,"merkle_root":"1daea8c4976c61c2f930f96ca600b50d2d4bd57206331f3bcf2e12af6750eb50","head_hash":"f06063f7b50aab88835e29c3030881958013c2dec2da694c36d0fc3397a189c6","ots":"\/.well-known\/touchstone\/checkpoints\/rec_01kvx9rq59jmsc01n7vkb3z35h\/984.ots","nostr_event_id":"ea7fdce42ef60bb3a110aa9a7e9dd24163a48491a88f7f2b5fb1dc678740cd6c","bitcoin_nostr_event_id":null,"bitcoin":{"height":972354,"hash":"0000000000000000000084b80415f6b30b3acce7c761228db876fc6d9f014af2","time":1792514446}},"how":"entry_hash = sha256(join(\u0022\\n\u0022,[seq,prev_hash,server_ts,payload_hash,actor_sub,counterparty_sub,actor_sig] + (server_beacon ? [\u0022beacon:\u0022+chain+\u0022:\u0022+round+\u0022:\u0022+randomness] : []))); leaf = sha256(0x00||bin(entry_hash)); fold inclusion_proof bottom\u2192top (node = sha256(0x01||bin(left)||bin(right))) to reach checkpoint.merkle_root; then `ots verify` the checkpoint to Bitcoin. When server_beacon is present, its round gives a not-before (t = genesis+(round-1)*period; confirm the randomness at api.drand.sh) and the anchor a not-after \u2014 a checkable time interval. Only hashes + the recorder signature are revealed, never the payload."}