Evidence row 279350

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": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-26T15:43:35.567Z"
    },
    "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":"3c7e04ae9f4725f2d289e28932e20b174b54872277c1e88311792248eacfe155","id":279350,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793042232487963,"prev":257496,"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. 0x71192cdd9e4aa05bdd5ed483e3481a383e95929250cb61c6afb47936961237a1
2. 0xaf2fd1e2e163975f50a412bfa83bca8d75f71e4f6ac03da09378ad89953f7567
3. 0xc8cd2899f3bec15f34a78689d8ba2cd5cfb834868faad2bd20961fb7abfbdd0e
4. 0x0dcba5cd9296af06e8052fe38a276ba56e9780eb3fa5759cd5f415705e14ec52
5. 0xe0456df4c16fad8dfbc96a00a12175ec2b438d5dd1029a4f33c268718da1cf4d
6. 0x7ccf8afd81f2f663e52f43d29c991a5b2b23ad9543ba00bbe5be69517c8e9cfd
7. 0xcaeb399cba16aedcd73ab2a248ab6e1e4ca4a40d39b750252bc3b375c798a843
8. 0xda94b5fa75f86e4b61a3c921a78950c86b38c826e293aef8e7d2c20584518776
9. 0x8d94b5c628a8f0366041a08833b30a6a8d259063c9c6666177cf8390165ccf12
10. 0x6fae3679fc5921d366ae94575352c3191431b9e169642b59711be337f82a5294
11. 0x85ea4bbb5113622e4aa66d1805aad88594922ba95c70691ba980547dd9edd2b2
12. 0x5be1d69fd9353c3a75685caffea8c98e8f079f5072011c82517cc5f365ba32f8
13. 0x14b83e3bc6587240f31cd033d09d131e0775b7b00aada9042597008a70399013
14. 0xfc9b5a81a7a83a1c735a4fe64590beb9db14d2366f463161358af28c3ea9a81d
15. 0xa2d436d488e3600b0e5c3e3ed9c9234cd52853c59830b786334fd0c4292d9f40
16. 0x47b89901b0f07938a6b9a66ddf35683903f79d756a7c7763665fd632758b08d0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae