Evidence row 1790980

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://api.artefaktum.dev/v1/artifacts/by-external-key/:external_key"
    ]
  ],
  "name": "Artefaktum",
  "owner_address": "0xeccc9f03eb79c6a5b0fbd919f95656557e6a6173",
  "raw": {
    "accepts": [
      {
        "amount": "5000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 60,
        "network": "eip155:8453",
        "payTo": "0xeccc9f03eb79c6a5b0fbd919f95656557e6a6173",
        "scheme": "exact"
      }
    ],
    "description": "Look up an artifact by the external_key it was stored under (your own name for it, slashes allowed), in one of the wallet's projects. max_age_seconds turns an artifact older than that into a 404, for caching. Returns the artifact. Costs $0.005 in USDC. No signup: a wallet's first payment creates its account and a default project; the same wallet later reaches the same files.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "pathParams": {
              "external_key": "smoke-nodash"
            },
            "queryParams": {
              "project_id": "019a3a10-0c3e-7c4e-9a51-2f6d8e1b4c70"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "created_at": "2026-10-31T09:30:00Z",
              "created_by": "wallet:0x857b06519e91e3a54538791bdbb0e22373e36b66",
              "description": "Quarterly revenue by region",
              "expires_at": "2026-11-30T09:30:00Z",
              "external_key": "reports/2026-q3",
              "id": "019a3a12-5b7d-7f21-8e3a-6c4b2d9f0a18",
              "latest_version": {
                "content_type": "application/pdf",
                "created_at": "2026-10-31T09:30:00Z",
                "etag": "9b2cf535f27731c974343645a3985328",
                "id": "019a3a12-5b7e-7a90-b1c2-3d4e5f6a7b8c",
                "original_filename": "q3-report.pdf",
                "sha256": "4f8b42c22dd3729b519ba6f68d2da7cc5b2d606d05daed5ad5128cc03e6c6358",
                "size_bytes": 482133,
                "status": "ready",
                "version_number": 1
              },
              "metadata": {
                "source": "agent"
              },
              "project_id": "019a3a10-0c3e-7c4e-9a51-2f6d8e1b4c70",
              "semantic_ready": true,
              "stale_upstream": false,
              "status": "ready",
              "superseded": false,
              "superseded_by": null,
              "tags": [
                "finance",
                "q3"
              ],
              "title": "Q3 revenue report",
              "updated_at": "2026-10-31T09:30:00Z"
            },
            "type": "json"
          }
        },
        "routeTemplate": "/v1/artifacts/by-external-key/:external_key",
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "pathParams": {
                  "additionalProperties": false,
                  "properties": {
                    "external_key": {
                      "type": "string"
                    }
                  },
                  "required": [
                    "external_key"
                  ],
                  "type": "object"
                },
                "queryParams": {
                  "properties": {
                    "max_age_seconds": {
                      "type": "string"
                    },
                    "project_id": {
                      "type": "string"
                    }
                  },
                  "required": [
                    "project_id"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "pathParams"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "const": "json",
                  "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/v1793456363/bazaar-icons/804f62358cb25a27.png",
    "lastUpdated": "2026-10-31T22:57:35.793Z",
    "quality": {
      "l30DaysTotalCalls": 3,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-31T22:57:35.561Z"
    },
    "resource": "https://api.artefaktum.dev/v1/artifacts/by-external-key/:external_key",
    "serviceName": "Artefaktum",
    "tags": [
      "storage",
      "artifacts",
      "files",
      "search",
      "agents"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Look up an artifact by the external_key it was stored under (your own name for it, slashes allowed), in one of the wallet's projects. max_age_seconds turns an artifact older than that into a 404, for caching. Returns the artifact. Costs $0.005 in USDC. No signup: a wallet's first payment creates its account and a default project; the same wallet later reaches the same files."
}

What the leaf hashes

{"body":"7782662d4d8e8010c94424c76d5306b22238feda349419bf94717503d19c01ac","id":1790980,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793559939346670,"prev":null,"subject":"x402_bazaar:https://api.artefaktum.dev/v1/artifacts/by-external-key/:external_key","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-01 (302406 rows).

1. 0xff741ce85275215f3229eea1a669642856ef61f8509887ebb15e404bbb48afd7
2. 0xb4b8d73b52432ae5fadf2b1533b05a542dd58970c2cfed42d4dd6d966837c31d
3. 0xcb444157c791cd242310c5239e3e69685156e3bcb5c02162e57831f3011af767
4. 0xbe0b07d81f0fc88587196f0ffd252e36f90caf7be0c5a3ba821aa23de93b8634
5. 0x6dee5b67e6ab1a93ae55abbc30d2e2cf170f0f32df3223171fbe4072e1695f0d
6. 0x220eca6b1366c785f2bafd86cb5dea4735afdedf51b5412b7b48589cd1ad5c38
7. 0x67729aef9b85b864979484eb7e30f5e0058d71d04eb19ea3bbdeb0ce85b92b4b
8. 0x8b87a92387659a3e8018cfc240cf022c56f32ba1238b90b719b79f2defd9ed60
9. 0xc872bd251f2977b9894ed21691e253fe99090f2d5109143d8d5f047b51d45f5a
10. 0x39b0e55b67d1cdf358a9110ce4c88e9c8e95f9f31ccabbdc2f267e050ff338af
11. 0xe1098daec235ac772ae70c56718c104f2ae277bcc659f2c52b39f355d637e7b0
12. 0x5ea8b4d83ef28102f02b54ad85e67b69963554a516f9dd3afa7c58d25ae8c487
13. 0x904a0ef836cb4b2dd139024d3379cfab31fd3b5798d155735069733eb5c3551b
14. 0x7cd72adb87b8751bf15c5933b0cfda4c062b8aa62aa82c7e8571c6aa0cc82204
15. 0xf7af9137c03da92bdd37d086da37554097bcd1fce016f93f2e66d18b71970c5d

Day root

0x7fa2cba1cf3d6b35630896f5fe1a650adb307ea2c376e80a5f2d9276b7cb5ab3

Chained

0x577ff89ba012beeff3197bcff7fa86752074bdf54205a24359cc437be2a952a4

Published

On Arc Testnet, block 70262758: 0x435bc1b9331471d72e1998f2e420983b5189d4da65ffbd6f27ef40daf5e1ea90