Evidence row 66669

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://api.ishob.com/v1/research-brief"
    ]
  ],
  "name": "ISHOB",
  "owner_address": "0x906f87f107b4675dd890b3f8eb2d51885e50e09d",
  "raw": {
    "accepts": [
      {
        "amount": "50000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:8453",
        "payTo": "0x906F87F107B4675dD890b3f8EB2d51885E50e09d",
        "scheme": "exact"
      }
    ],
    "description": "Research brief on any topic in one call: the best papers from ISHOB's open-licence archive, filled with a live search of 250M+ scholarly works, each with authors, year, venue, DOI and citations; abstracts only for openly licensed papers (CC0 / public domain / CC BY / CC BY-SA), metadata and link for the rest; plus a short AI synthesis citing the papers as [n]. Checked before payment: if nothing is found anywhere the answer is a free 404 'not_covered'.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "max_papers": 5,
              "query": "perovskite solar cell stability"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "brief": {
                "ai_generated": true,
                "text": "Recent work attributes degradation mainly to ... [1][3] ..."
              },
              "coverage": {
                "from_archive": 5,
                "reusable_abstracts": 5
              },
              "papers": [
                {
                  "licence": "CC-BY-4.0",
                  "n": 1,
                  "reusable": true,
                  "source": "ishob_archive",
                  "title": "Phase Homogeneity and Photothermal Stability in ...",
                  "year": 2026
                }
              ]
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "include_live": {
                      "default": true,
                      "description": "Fill with live results from open scholarly sources when the archive has fewer papers",
                      "type": "boolean"
                    },
                    "max_papers": {
                      "default": 5,
                      "maximum": 8,
                      "minimum": 1,
                      "type": "integer"
                    },
                    "query": {
                      "description": "Research question or topic",
                      "maxLength": 200,
                      "minLength": 3,
                      "type": "string"
                    },
                    "synthesize": {
                      "default": true,
                      "description": "Add the AI-written brief",
                      "type": "boolean"
                    },
                    "year_from": {
                      "description": "Only papers published in or after this year",
                      "minimum": 1900,
                      "type": "integer"
                    }
                  },
                  "required": [
                    "query"
                  ],
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-13T07:09:26.271Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-13T07:09:25.476Z"
    },
    "resource": "https://api.ishob.com/v1/research-brief",
    "serviceName": "ISHOB",
    "tags": [
      "research",
      "scientific-literature",
      "open-access",
      "dataset",
      "json"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Research brief on any topic in one call: the best papers from ISHOB's open-licence archive, filled with a live search of 250M+ scholarly works, each with authors, year, venue, DOI and citations; abstracts only for openly licensed papers (CC0 / public domain / CC BY / CC BY-SA), metadata and link for the rest; plus a short AI synthesis citing the papers as [n]. Checked before payment: if nothing is found anywhere the answer is a free 404 'not_covered'."
}

What the leaf hashes

{"body":"b4d12b5a8c4f599243f532fe09cd0bc9e61391973a26d0b6859ed953a6ba91aa","id":66669,"kind":"listing","method":"baseline/1","observed_us":1793025461255075,"prev":null,"subject":"x402_bazaar:https://api.ishob.com/v1/research-brief","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. 0x3c57b71bd803a159357bdc23b0d8afaa887b882849a0c804e2d91f9201f043c4
2. 0xc4e5dfd9eeef4ae3835cda4472ca0563b10c18bcbbea37f436eac582461b8d9b
3. 0x089b8d46be1bd478e890478959178ef4d86b44e1424285343a55510ee71aa1a4
4. 0xcb91e7bceef31d73886856999de48e35f46c8120173deea4f28c648d6c68acb6
5. 0xcaa1dd41edcc48e252c7bc3e326e1fcb5757872c6cc313e363b062d35eb2e2a9
6. 0x26896255f4607097054677016753f24b47674214aa14b43b35bb82ef79e88b5d
7. 0x88e1219f5d875b325ef5862483188bd23a67ecfb198abd5a5f0dca2f9c7ce395
8. 0x80d479552012f6e936eed072d101dc52e1a752572cfb197539a94b42817516d8
9. 0xf3377e5a3d9ffa09ca4a8f90e033745dad5af466386e85882a894e4c3fbfb0f4
10. 0x210e4fd4b2b60dbd88a7f42093d3d642e105b1738155bf382034c694bee5fbcf
11. 0xd7dd18a37a5bb07e81a8083d8d1469e052ceebb2814b00f5a8d4f4cd181a5108
12. 0xd04df0f7f3be4d014b4cea8172ada286fbcf5bcb32ae1b281704fd75627b661b
13. 0x215f432600b78f2e7c9629cd10ce6ce4b7f3351b0b71f3f2c7dcb8e650f6cd63
14. 0x7f594f5609f388d64d3cda87b5631d393ee8300bb09bad71f150113a5886ee33
15. 0x4b52a97f7a80ff7778a702b85267b8d2e5c93ce160942656435c29ae7be68bf4
16. 0x2e6a32eb32761c210560e852405e2f865f958ddbe01027894f8b9c1b3433b9f0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae