Evidence row 257496

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://grok-backtest-api.fly.dev/universe"
    ]
  ],
  "name": "Point-in-time Universe",
  "owner_address": "0x4e6e6c5889dc8b1b96c60ab82d21ed45c6b629f3",
  "raw": {
    "accepts": [
      {
        "amount": "50000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x4E6E6C5889dc8B1B96c60AB82D21ED45C6b629f3",
        "scheme": "exact"
      }
    ],
    "description": "Top-N Coinbase USD pairs by trailing 20-day dollar volume as of a past date, using only data available that day (survivorship-bias-free universe for backtests).",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "date": "2026-07-01",
              "top_n": 30
            },
            "type": "http"
          },
          "output": {
            "example": {
              "coins": [
                {
                  "age_days": 162,
                  "avg_dollar_volume_20d": 1100000000,
                  "close": 107000,
                  "coin": "BTC-USD",
                  "rank": 1
                }
              ],
              "count": 3,
              "date": "2026-07-01",
              "top_n": 3
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "additionalProperties": false,
                  "properties": {
                    "date": {
                      "description": "YYYY-MM-DD (default: last completed day)",
                      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
                      "type": "string"
                    },
                    "min_age_days": {
                      "default": 35,
                      "maximum": 120,
                      "minimum": 0,
                      "type": "integer"
                    },
                    "min_avg_dollar_volume": {
                      "default": 1000000,
                      "minimum": 0,
                      "type": "number"
                    },
                    "top_n": {
                      "default": 30,
                      "maximum": 200,
                      "minimum": 1,
                      "type": "integer"
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1793029411/bazaar-icons/5af093559a8b46a6.png",
    "lastUpdated": "2026-10-26T15:43:35.668Z",
    "quality": {
      "lastCalledAt": "2026-10-26T15:43:35.668Z"
    },
    "resource": "https://grok-backtest-api.fly.dev/universe",
    "serviceName": "Point-in-time Universe",
    "tags": [
      "crypto",
      "universe",
      "backtest",
      "data"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Top-N Coinbase USD pairs by trailing 20-day dollar volume as of a past date, using only data available that day (survivorship-bias-free universe for backtests)."
}

What the leaf hashes

{"body":"7991468c5a68e4d1d21a0abd4bcacec426769f37e54e39e0d3d22e654d754cbd","id":257496,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793029765559327,"prev":null,"subject":"x402_bazaar:https://grok-backtest-api.fly.dev/universe","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

1. 0xc82d426802f02541b9e6c029895268cf78e6f53f83a2214b9bd332a5543ba411
2. 0xf966ea1400b624328d58edfb966c8d7c82d663c645b9dcbb9b1077e7a55baf21
3. 0xbc06563761d6625c2e2853dcc2bf0b9ed2d2687cd5da61ce1e0fb6ca0063a3be
4. 0x7a544782ea231f42da5b73bdbc59afd4b9cbaa979f44d84a351d12227d11eae6
5. 0x637654e9c68495773a42672dd070c5101e67c5846945d28e5b2c2ccbb313e771
6. 0x912b47be0adc5fdaf9e50e8782615ff772f055139c022ea94a71a82f3553ac2e
7. 0x593dbcfa5ef8fea2372c534737a0723ca90cd00ca9e9dbea90aab0118b7dc845
8. 0x9871204d5b6ab9d041c9093b0297517bb47bce11119288a0f740443232971c74
9. 0x469a34c3c97adfe074d09a0783fee6072aec7957eb78f6ee3e2dfb639a2ffb62
10. 0x675ae978905879f96dab2ece83376d01eb27968f2044719307dbc7f840ae0cec
11. 0xac575d7ca8c3c7e88957908dda0517fbb35f0894886bb91a97cff3aa71fa23e9
12. 0xde09984239f27618a13932caf48f5d39831fc5021500b0581dce0dabd570bd6e
13. 0x72e35aac89ebca631656c2b1aecbdc094807d9807f12c22a6ddf35cc1f5e21d6
14. 0x5b20d8aab05225a3497eadcce89d2e2a586a510fb31334793d3f46f88f0157c5
15. 0xe94ca5b798e9899ad611e57835af42266e20f53f44977e487d81365e30972beb
16. 0x703f95866af09c5e5d6ead7411e9a10f964a41a2aff64d4a55ff0053c023a023
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae