{
    "meta": {
        "title": "D-Central — Bitcoin Pool Centralization Tracker",
        "description": "Bitcoin mining-pool hashrate concentration by time window: pool count, Nakamoto coefficient (fewest pools to exceed 50% of blocks), HHI, and top-1 / top-3 pool share — plus the current per-pool share table.",
        "generated": "2026-07-15T13:08:27+00:00",
        "version": "1.0",
        "license": "https://creativecommons.org/licenses/by/4.0/",
        "license_name": "CC BY 4.0",
        "source": "https://d-central.tech/bitcoin-pool-centralization/",
        "method": "Shares from block attribution (mempool.space). Nakamoto = fewest pools whose cumulative share exceeds 50%. HHI = sum of squared percentage shares (0-10000; US DOJ: <1500 unconcentrated, 1500-2500 moderate, >2500 high).",
        "disclaimer": "Pool attribution is a proxy for hashrate based on identified coinbase tags; unidentified blocks and pool-hopping add noise. A point-in-time snapshot, refreshed every 6 hours."
    },
    "windows": [
        {
            "window": "1w",
            "blocks": 984,
            "pool_count": 19,
            "nakamoto": 3,
            "hhi": 1498,
            "top1_share": 26.10000000000000142108547152020037174224853515625,
            "top3_share": 61.2000000000000028421709430404007434844970703125
        },
        {
            "window": "1m",
            "blocks": 4367,
            "pool_count": 25,
            "nakamoto": 3,
            "hhi": 1435,
            "top1_share": 25.39999999999999857891452847979962825775146484375,
            "top3_share": 57.89999999999999857891452847979962825775146484375
        },
        {
            "window": "3m",
            "blocks": 12962,
            "pool_count": 26,
            "nakamoto": 3,
            "hhi": 1501,
            "top1_share": 27.89999999999999857891452847979962825775146484375,
            "top3_share": 58
        },
        {
            "window": "1y",
            "blocks": 52480,
            "pool_count": 34,
            "nakamoto": 3,
            "hhi": 1538,
            "top1_share": 29,
            "top3_share": 58.10000000000000142108547152020037174224853515625
        }
    ],
    "current_pools": [
        {
            "name": "Foundry USA",
            "blocks": 1109,
            "share_pct": 25.39999999999999857891452847979962825775146484375
        },
        {
            "name": "AntPool",
            "blocks": 820,
            "share_pct": 18.780000000000001136868377216160297393798828125
        },
        {
            "name": "F2Pool",
            "blocks": 598,
            "share_pct": 13.6899999999999995026200849679298698902130126953125
        },
        {
            "name": "SpiderPool",
            "blocks": 425,
            "share_pct": 9.730000000000000426325641456060111522674560546875
        },
        {
            "name": "ViaBTC",
            "blocks": 398,
            "share_pct": 9.1099999999999994315658113919198513031005859375
        },
        {
            "name": "MARA Pool",
            "blocks": 238,
            "share_pct": 5.45000000000000017763568394002504646778106689453125
        },
        {
            "name": "SECPOOL",
            "blocks": 157,
            "share_pct": 3.600000000000000088817841970012523233890533447265625
        },
        {
            "name": "OCEAN",
            "blocks": 137,
            "share_pct": 3.140000000000000124344978758017532527446746826171875
        },
        {
            "name": "Luxor",
            "blocks": 124,
            "share_pct": 2.839999999999999857891452847979962825775146484375
        },
        {
            "name": "SBI Crypto",
            "blocks": 92,
            "share_pct": 2.109999999999999875655021241982467472553253173828125
        },
        {
            "name": "Braiins Pool",
            "blocks": 84,
            "share_pct": 1.9199999999999999289457264239899814128875732421875
        },
        {
            "name": "Binance Pool",
            "blocks": 67,
            "share_pct": 1.5300000000000000266453525910037569701671600341796875
        },
        {
            "name": "Unknown",
            "blocks": 44,
            "share_pct": 1.0100000000000000088817841970012523233890533447265625
        },
        {
            "name": "BTC.com",
            "blocks": 15,
            "share_pct": 0.340000000000000024424906541753443889319896697998046875
        },
        {
            "name": "Poolin",
            "blocks": 14,
            "share_pct": 0.320000000000000006661338147750939242541790008544921875
        },
        {
            "name": "ULTIMUSPOOL",
            "blocks": 12,
            "share_pct": 0.270000000000000017763568394002504646778106689453125
        },
        {
            "name": "WhitePool",
            "blocks": 12,
            "share_pct": 0.270000000000000017763568394002504646778106689453125
        },
        {
            "name": "NiceHash",
            "blocks": 8,
            "share_pct": 0.179999999999999993338661852249060757458209991455078125
        },
        {
            "name": "Innopolis Tech",
            "blocks": 6,
            "share_pct": 0.14000000000000001332267629550187848508358001708984375
        },
        {
            "name": "RedRock Pool",
            "blocks": 2,
            "share_pct": 0.05000000000000000277555756156289135105907917022705078125
        },
        {
            "name": "Public Pool",
            "blocks": 1,
            "share_pct": 0.0200000000000000004163336342344337026588618755340576171875
        },
        {
            "name": "Solo CK",
            "blocks": 1,
            "share_pct": 0.0200000000000000004163336342344337026588618755340576171875
        },
        {
            "name": "Mining-Dutch",
            "blocks": 1,
            "share_pct": 0.0200000000000000004163336342344337026588618755340576171875
        },
        {
            "name": "DMND",
            "blocks": 1,
            "share_pct": 0.0200000000000000004163336342344337026588618755340576171875
        },
        {
            "name": "Parasite",
            "blocks": 1,
            "share_pct": 0.0200000000000000004163336342344337026588618755340576171875
        }
    ]
}