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"timestamp", "sequence" ], "row_count": 124187004, "row_groups": [ 81, 554 ], "sha256": "37a5b624e407181543f1b5b97448d17642e1c683701c9a67e2f284ce2d7617d8" }, "tick_size_change": { "byte_range": [ 1581412396, 1581811457 ], "columns": [ "timestamp_received", "sequence", "timestamp", "market", "asset_id", "old_tick_size", "new_tick_size", "witness_set", "arrival_skew", "source_witness" ], "max_sequence": 263742053194565120, "min_sequence": 6192450267801228, "order_by": [ "market", "asset_id", "timestamp", "sequence" ], "row_count": 10940, "row_groups": [ 555, 555 ], "sha256": "194d7dfe0391a0d6c49e1a826c9b07ad5b627b37b32518c28b0bb821ff01e0ca" } }, "row_count": 144499155, "sequence_note": "sequence and timestamp_received are collector-local provenance; where domains carry the same row, the merge keeps the EARLIEST-RECEIVED copy, equal arrivals breaking by registry order (active: c, h, e, g). The winner is per row, not per hour -- each row names its own in source_witness", "sha256": "6148e55a582f82d315245efca613bdcc3b56d6ac6c1d0d87f68bdb18c4503494", "skipped_witnesses": { "f": { "alive": false, "listed_utc": "2026-09-20T06:42:52.598886Z", "newest_upload": "2026-09-20T00:20:12.465000Z", "reason": "not_staged" } }, "verification": { "note": "A range digest certifies BYTES. That those bytes are that product comes from this manifest and is cross-checkable against the Parquet footer, which is inside the whole-file sha256.", "primary": "sha256sum == .sha256", "secondary": "curl -r - | sha256sum == .products..sha256" }, "witness_stats": "2026-09-20T01.witness_stats.json", "witnesses": "cheg", "served_verbatim": true, "served_note": "This hour is the merger's union file, published byte for byte. Hours before the era cutover are rebuilt here from the seven product files and carry one column fewer." }