Evidence row 453255

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://x402-tools.vercel.app/api/concerts"
    ]
  ],
  "name": "x402-tools.vercel.app/api/concerts",
  "owner_address": "0xbad1aa224bfe4feb460e12b2553dcdf98a7098d0",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xbAd1Aa224bFe4fEb460E12b2553DcDf98a7098d0",
        "scheme": "exact"
      }
    ],
    "description": "Search for upcoming concerts. Supports city, date range, genre, and artist filtering.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "countryCode": "US",
              "page": "0"
            },
            "type": "http"
          },
          "output": {
            "example": [
              {
                "artists": [
                  "Khruangbin",
                  "Bob Moses"
                ],
                "city": "Boston",
                "date": "2026-04-15",
                "name": "Khruangbin - A La Sala Tour",
                "priceRange": {
                  "max": 150,
                  "min": 55
                },
                "time": "20:00:00",
                "url": "https://example.com/event/abc123",
                "venue": "Paradise Rock Club"
              }
            ],
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "artists": {
                      "description": "Comma-separated artist names to filter by (e.g. Khruangbin,Bob Moses)",
                      "type": "string"
                    },
                    "city": {
                      "description": "City name (e.g. Boston, New York)",
                      "type": "string"
                    },
                    "countryCode": {
                      "description": "Country code filter (default US)",
                      "type": "string"
                    },
                    "endDateTime": {
                      "description": "End of date range in ISO 8601 (e.g. 2026-03-31T23:59:59Z)",
                      "type": "string"
                    },
                    "genre": {
                      "description": "Music genre. One of: Alternative, Ballads/Romantic, Blues, Classical, Country, Dance/Electronic, Folk, Hip-Hop/Rap, Jazz, Latin, Metal, Pop, R&B, Reggae, Rock, World.",
                      "type": "string"
                    },
                    "page": {
                      "description": "Page number for pagination (default 0)",
                      "type": "string"
                    },
                    "startDateTime": {
                      "description": "Start of date range in ISO 8601 (e.g. 2026-03-01T00:00:00Z)",
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "items": {
                    "properties": {
                      "artists": {
                        "description": "Performer/artist names",
                        "items": {
                          "type": "string"
                        },
                        "type": "array"
                      },
                      "city": {
                        "description": "City name",
                        "nullable": true,
                        "type": "string"
                      },
                      "date": {
                        "description": "Local date (YYYY-MM-DD)",
                        "type": "string"
                      },
                      "name": {
                        "description": "Concert/event name",
                        "type": "string"
                      },
                      "priceRange": {
                        "description": "Ticket price range or null if unavailable",
                        "nullable": true,
                        "properties": {
                          "max": {
                            "description": "Maximum ticket price (USD)",
                            "type": "number"
                          },
                          "min": {
                            "description": "Minimum ticket price (USD)",
                            "type": "number"
                          }
                        },
                        "type": "object"
                      },
                      "time": {
                        "description": "Local time (HH:MM:SS) or null",
                        "nullable": true,
                        "type": "string"
                      },
                      "url": {
                        "description": "Event URL",
                        "nullable": true,
                        "type": "string"
                      },
                      "venue": {
                        "description": "Venue name",
                        "nullable": true,
                        "type": "string"
                      }
                    },
                    "required": [
                      "name",
                      "date",
                      "artists"
                    ],
                    "type": "object"
                  },
                  "type": "array"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-27T09:55:01.542Z",
    "quality": {
      "l30DaysTotalCalls": 6,
      "l30DaysUniquePayers": 5,
      "lastCalledAt": "2026-10-23T23:27:33.273Z"
    },
    "resource": "https://x402-tools.vercel.app/api/concerts",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Search for upcoming concerts. Supports city, date range, genre, and artist filtering."
}

What the leaf hashes

{"body":"52eb9789b84afcbf322207d06849fdd2a5dda9b0b7cf2afc7972a9c682c5efd9","id":453255,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793100612437541,"prev":125519,"subject":"x402_bazaar:https://x402-tools.vercel.app/api/concerts","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0x79650872cab2b9fe3f33173714ed12cdfa2b1156311bf39d05dbbce76456dcc9
2. 0x9e53d781a850d2ac4605a1d83a2c7073b500f73c79082b45933edec3a4f1177a
3. 0x8df2e3a2b4a0a865054d4e65ea61e4ca4bcb16945e0e50327d992252c372d4ef
4. 0x82db44b621efa01de3098e510f7677e40a94e36f8276ab68ffaef6c5ca4bb926
5. 0x657e73beb15a0454f67955b623f13459c87ed7263888dc90a205253837f26161
6. 0x9416a2c6ce505fdf3d38ffd0973d13cdf09d6768d1eaabb9b7b667a49a7d404e
7. 0x8e66a4f067605560e6dfdb549f1d4fdbb6bfd564ec4a48fd2199dba117aacd7b
8. 0x738efcd711ae93741a421914c8160f46bc63ad150d84c73d7ddc1fec5a47ba46
9. 0x0da77fe7ffac648d3c87eea4dde61169cee956867463767ef43c4e050c3f9f5e
10. 0x5671db75eeaddc94dc4a891114e70d0b39acd13d96c8477b89a74e783ed1443e
11. 0x762b944704b581c24cf35c5d2505808d0ceccd237060a6074a4dc586ddf27b75
12. 0x0574b16d30fa9d3621e88c3779ea2cd142521826d4e75735f3ae6d4ed075cfc4
13. 0x8f2d125f5fe55a24b5da16577766eeaa13f24a272bb4c1c016f423ae917da681
14. 0x9848c068b1371232529d2b5738fdc45b854c57da041b69ea7c9e112b14e2d9d1
15. 0x275720ecabb68df33eee92ae4fd70572a8d952d6c61c061c2869cfc3217aa5c5
16. 0x23cf9bb4337ee8be7fcae368fd69d24c62c11fb45882127b4cd919bb96a19996
17. 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4