Evidence row 1261878

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://api.facts402.com/check"
    ]
  ],
  "name": "Base Token Check",
  "owner_address": "0x5498b0aa90cd56f8962cbd136df3d3769c85f149",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x5498b0Aa90cd56F8962CBd136DF3D3769C85f149",
        "scheme": "exact"
      }
    ],
    "description": "Base mainnet token facts: name, symbol, decimals, totalSupply, contract/EIP-1967 proxy status, owner(), and mint/pause/blacklist selectors in bytecode. Facts only, no ratings.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
              "block_number": 53260243,
              "bytecode_size_bytes": 1852,
              "cached": false,
              "chain": "base-mainnet",
              "chain_id": 8453,
              "decimals": 6,
              "disclaimer": "Raw on-chain facts read from Base mainnet at the given block. Not an opinion, rating, audit or investment advice. Selector matches only show that a 4-byte function selector appears as a PUSH4 constant in the scanned bytecode (proxy and, if found, its implementation); they do not prove who can call the function or that it works, and selectors with a leading zero byte or unusual proxy patterns may be missed.",
              "functions_in_bytecode": {
                "blacklist": {
                  "matched_signatures": [
                    "blacklist(address)",
                    "unBlacklist(address)",
                    "isBlacklisted(address)"
                  ],
                  "selector_found": true
                },
                "mint": {
                  "matched_signatures": [
                    "mint(address,uint256)"
                  ],
                  "selector_found": true
                },
                "pause": {
                  "matched_signatures": [
                    "pause()",
                    "unpause()",
                    "paused()"
                  ],
                  "selector_found": true
                }
              },
              "functions_scanned": "proxy+implementation",
              "is_contract": true,
              "is_eip7702_delegated_eoa": false,
              "name": "USD Coin",
              "owner": "0x3ABd6f64A422225E61E435baE41db12096106df7",
              "proxy": {
                "admin": null,
                "beacon": null,
                "beacon_implementation": null,
                "implementation": null,
                "is_eip1967_proxy": false,
                "legacy_zeppelinos_implementation": "0x2Ce6311ddAE708829bc0784C967b7d77D19FD779"
              },
              "symbol": "USDC",
              "totalSupply": "4291664762979566"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "token": {
                      "description": "Base mainnet (chain id 8453) token contract address",
                      "pattern": "^0x[0-9a-fA-F]{40}$",
                      "type": "string"
                    }
                  },
                  "required": [
                    "token"
                  ],
                  "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": "2026-10-30T10:49:58.197Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-30T10:49:57.627Z"
    },
    "resource": "https://api.facts402.com/check",
    "serviceName": "Base Token Check",
    "tags": [
      "base",
      "erc20",
      "token",
      "onchain",
      "facts"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Base mainnet token facts: name, symbol, decimals, totalSupply, contract/EIP-1967 proxy status, owner(), and mint/pause/blacklist selectors in bytecode. Facts only, no ratings."
}

What the leaf hashes

{"body":"0008b58002e8c1598172724a10fabdbc1d5a72ae4a463c28b5d833cffaab23fb","id":1261878,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793385517070086,"prev":null,"subject":"x402_bazaar:https://api.facts402.com/check","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-30 (243099 rows).

1. 0x8026247d9977fb45383b7eb6aa09c03796810d0ddb1d36c0450c6d9fe97110a4
2. 0xd504fb0c77526d52078ffcd83b7c5eaeb32a00e1299643c0ab9da8c3e2cd2fdb
3. 0x5d3c737e85e5852d28e5430fdefb6601abfebc375cdcef5cd9fe2bb04682630c
4. 0x34320be124265ae5b33c662784e582b7ae1ccc7a9476cf9d7715887adff8fe0b
5. 0x28c9d988a9e468762e838b14fdfbded7e91d225447ca230d811e8be924b408ac
6. 0xe6f8f39175f0cff6e0c060c4c6f59e7326e8742029c47f4f60bb56dbde43f83f
7. 0xf957b7baa1d5f21dd34af8df8e7e61a07c6bea5657c4958e7d15d74640fff6ce
8. 0x854fee2418193f90efd70afe3bf13d257f04b8f7a0a1f2913fb8ab479387d49b
9. 0x5f2c95aba2df9abad5e690dadf5d0b7ce9de4f015e115b3b732a7ce6c43d3ced
10. 0x248a686d5868db6371e61c4b5ebde814debbc118a59c031edd1456fc607f5efa
11. 0x42aefa653f9c3710b2801a977c07ee3c11c74bff3db13b4180acfaa1e96d4fa5
12. 0x6b8cfabb21174b809f902161d13bf663d4c6738870d704105b972ec978b90ced
13. 0xa7d56640df9ea5dff8b1806e8b12302229aca5a856e7e8485fd58e4585190f8d
14. 0x98147b4434f11be9b2162fe0bf2cff64bd30ca1bfe5cd0edf25228078b678708
15. 0x235114e50a987e65d728b9ef8b5978846cd7c01f22effc55dd604c388ce359ec
16. 0xdbaaffa44665d1fa60d33d2c4075bd87629b76d01a6ee63e621e78590303b56d
17. 0xffe660edb9e5c6e3449a49454634c3e7b2f9fe703e5697f723b021735647ab7e
18. 0x30a81d8fcef4e8f9e2877c62796cfc5612fc1b251127d531dee28f8dbd5c5147

Day root

0x0826c7ad6039e06a2360ca0a4a3a4fe7f2626c6dc19f71a37599386f78b39875

Chained

0x36b4c8a1063758f0b8765fa1bdf75fa92fb543cc183add3e261880ee2bd1f822

Published

On Arc Testnet, block 69923247: 0x8704744146c6967c8abc9e9a99de4db7283b29e840922ea83a69b6fe776e6861