{"v":1,"kind":"merkle_clock","what":"A periodic Merkle tree of receipt signature hashes. A signature proves this key signed these bytes; it does not prove when. Inclusion in a committed slot is what makes backdating the harder problem.","not":["Not a chain product and not announced as one.","Not a citizen-vs-state receipt.","Leaves are hashes of Ed25519 signatures, never payloads or patient data."],"leaf_algo":"sha256(ed25519_sig)","tree_algo":"rfc6962-sha256","slot_seconds":3600,"open":{"slot":"20260827T06Z","leaf_count":0,"status":"open","note":"An open slot is our log. It is not a public clock until sealed and committed."},"slots":[{"slot":"20260827T02Z","slot_start_unix":1787796000,"slot_end_unix":1787799600,"leaf_count":8,"root_sha256":"f8ce0d45bcf9a34b02e7110797a5f5dc0f2c55a280d610f7bc5463f191e5085d","leaf_algo":"sha256(ed25519_sig)","tree_algo":"rfc6962-sha256","sealed_at":1787799527,"status":"committed","commitment":{"method":"opentimestamps","digest_sha256":"f8ce0d45bcf9a34b02e7110797a5f5dc0f2c55a280d610f7bc5463f191e5085d","status":"bitcoin_tx","note":"OpenTimestamps calendar alice aggregated this root into Bitcoin tx 7849891a92b8c31b8c68057db3386016a189bc6fcf035c39a3cde8f9ffbfb66f (block 964237). The OP_RETURN is the calendar aggregate, not the slot root. ots verify completes after the calendar releases the Merkle path (typically 6 confirmations). This is not a chain product.","bitcoin":{"txid":"7849891a92b8c31b8c68057db3386016a189bc6fcf035c39a3cde8f9ffbfb66f","explorer":"https://mempool.space/tx/7849891a92b8c31b8c68057db3386016a189bc6fcf035c39a3cde8f9ffbfb66f","confirmed":true,"note":"OpenTimestamps calendar aggregated this slot root into a Bitcoin OP_RETURN. `ots verify` completes after the calendar releases the Merkle path (typically 6 confirmations). The transaction itself is already publicly inspectable.","block_height":964237,"block_hash":"000000000000000000010f5b76f2f32c6d05b416a613288321aee1cb173300b8","block_time":1787801201,"op_return":"c40b503edd77a79f3fb1f35744193f69bc996e6e413f5f8aca551aad57d40635","op_returns":["c40b503edd77a79f3fb1f35744193f69bc996e6e413f5f8aca551aad57d40635"],"confirmations":1,"tip_height":964237},"calendars":["https://alice.btc.calendar.opentimestamps.org","https://bob.btc.calendar.opentimestamps.org","https://finney.calendar.eternitywall.com"],"ok_count":3}}],"verify":"python scripts/verify_clock.py --help","docs":"docs/CLOCK.md"}