Evidence row 74890

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://engine.beehivewebstudio.com/v1/token-briefs/brief"
    ]
  ],
  "name": "Beehive Token Brief",
  "owner_address": "0x055ab9be224bc906db503557d71aa2ef6f502507",
  "raw": {
    "accepts": [
      {
        "amount": "250000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x055ab9BE224bc906dB503557D71aA2eF6f502507",
        "scheme": "exact"
      }
    ],
    "description": "Check Base ERC-20 decimals and total supply at a recorded block, and up to three claims against cited evidence. Returns supported, contradicted, or unknown. Official project coverage currently includes Base USDC only. No safety verdict, liquidity, or holder analysis. One brief costs 0.25 USDC; retain your private Idempotency-Key for recovery.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "headers": {
              "Idempotency-Key": "eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee"
            },
            "method": "GET",
            "queryParams": {
              "claim": "Circle lists this exact contract as USDC on Base.",
              "contractAddress": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "brief": {
                "baselineStatus": "no_baseline",
                "changes": [],
                "schemaVersion": "1",
                "snapshot": {
                  "claims": [
                    {
                      "claim": "Circle lists this exact contract as USDC on Base.",
                      "evidenceIds": [
                        "registry-source"
                      ],
                      "explanation": "Exact contract appears in the official mainnet registry.",
                      "state": "supported"
                    }
                  ],
                  "evidence": [
                    {
                      "excerpt": "Base mainnet registry entry for this contract.",
                      "id": "registry-source",
                      "url": "https://developers.circle.com/stablecoins/usdc-contract-addresses"
                    }
                  ],
                  "facts": {
                    "decimals": "6"
                  },
                  "token": {
                    "contractAddress": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
                    "network": "eip155:8453"
                  }
                },
                "unknowns": [
                  "Reserves, safety, liquidity and holders are not assessed."
                ]
              },
              "receipt": {
                "status": "settled",
                "transactionHash": "0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
              }
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "additionalProperties": false,
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "headers": {
                  "additionalProperties": false,
                  "properties": {
                    "Idempotency-Key": {
                      "description": "Generate a fresh cryptographically random 32-byte hex secret per purchase. Never reuse the example. Keep it for retries and recovery; do not disclose it.",
                      "pattern": "^[0-9a-f]{64}$",
                      "type": "string"
                    }
                  },
                  "required": [
                    "Idempotency-Key"
                  ],
                  "type": "object"
                },
                "method": {
                  "const": "GET"
                },
                "queryParams": {
                  "additionalProperties": false,
                  "properties": {
                    "claim": {
                      "description": "First proposition to check.",
                      "maxLength": 500,
                      "minLength": 1,
                      "type": "string"
                    },
                    "claim2": {
                      "maxLength": 500,
                      "minLength": 1,
                      "type": "string"
                    },
                    "claim3": {
                      "maxLength": 500,
                      "minLength": 1,
                      "type": "string"
                    },
                    "contractAddress": {
                      "description": "Base ERC-20 contract; defaults to native USDC.",
                      "pattern": "^0x[0-9a-fA-F]{40}$",
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "const": "http"
                }
              },
              "required": [
                "type",
                "method",
                "queryParams",
                "headers"
              ],
              "type": "object"
            },
            "output": {
              "additionalProperties": false,
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "const": "json"
                }
              },
              "required": [
                "type",
                "example"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-09-28T15:25:20.599Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-09-28T15:25:20.416Z"
    },
    "resource": "https://engine.beehivewebstudio.com/v1/token-briefs/brief",
    "serviceName": "Beehive Token Brief",
    "tags": [
      "token-research",
      "base",
      "evidence",
      "erc20",
      "usdc"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Check Base ERC-20 decimals and total supply at a recorded block, and up to three claims against cited evidence. Returns supported, contradicted, or unknown. Official project coverage currently includes Base USDC only. No safety verdict, liquidity, or holder analysis. One brief costs 0.25 USDC; retain your private Idempotency-Key for recovery."
}

What the leaf hashes

{"body":"a1b283d409f38b18604e0e47e730c23f6c6fe9cb9e70979c6f5d69c3687d5f64","id":74890,"kind":"listing","method":"baseline/1","observed_us":1793025489769249,"prev":null,"subject":"x402_bazaar:https://engine.beehivewebstudio.com/v1/token-briefs/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. 0x395be0198f556d772a30f4cb047a6a0941ede6fe65fd21e7a67a0b380f10dd2c
2. 0xaace22b81df200d9097d598839eeb89030dac674b0947d6d1882183025c824d8
3. 0xac20249398aa0a4a390a361c8498df5ff653e13c39be3ce09efc5e63305a9237
4. 0xa227228de3bd2e2621bf0cb81a491aa7dcefea99234afad12efa27feb233ed14
5. 0xd94fb745912a1081a02e2d6c6f6361dc7239109a7f6d4ac3925b0835cf1b83a9
6. 0x29e33af3a76de0fdcd53b28f341a06934712769ec8791c6b091340a7cf1804da
7. 0x0f74d4544733f9c12cf18cb10abc732d2ecfe3df2f5b67ee01d3dbbb3dd0f33e
8. 0x2f8c5aef7268e70464a53de9690fa2f0602fbf67fa92f63b16cd6cedb0eca9ab
9. 0xd80d4eae73bbd3fdccb88b8241b520b340e41387dbe44d61dd6bbef84d1347f3
10. 0x523b8ac4b1e261a073661101852ada4310c46af0ed03f362d2ef83a301a47101
11. 0x04a1aa6c1d916326b08791d1568a512f10ac6aaee806ec4073570b0a6b1b64af
12. 0x18cc4431e4bbe45ee72defb9bb3318434364bf71c883055c6197fa7102ec601a
13. 0xe2214b3d6a48396930d1739b02ea366de2aac5337c9b9ff2aff28cecf6518139
14. 0x7f594f5609f388d64d3cda87b5631d393ee8300bb09bad71f150113a5886ee33
15. 0x4b52a97f7a80ff7778a702b85267b8d2e5c93ce160942656435c29ae7be68bf4
16. 0x2e6a32eb32761c210560e852405e2f865f958ddbe01027894f8b9c1b3433b9f0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae