Evidence row 63628

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://agents.factstamp.dev/probe"
    ]
  ],
  "name": "agents.factstamp.dev/probe",
  "owner_address": "0xc3bcd24a2b350cc73b8516b2a0539a323b42cc32",
  "raw": {
    "accepts": [
      {
        "amount": "20000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "description": "A two-cent probe of the FactStamp engine: one small claim in, one cited answer out, receipted. Send a dated figure, a company name, a DOI/arXiv id or a package@version and get the verdict, the value and the source it rests on with our retrieval time — the same engine and the same sources the full-price doors read. Unknown is a valid answer and nothing is invented. Paid per call in USDC on Base; no pack code and no free tier.",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxAmountRequired": "20000",
        "maxTimeoutSeconds": 300,
        "mimeType": "application/json",
        "network": "eip155:8453",
        "payTo": "0xc3bcd24a2b350cc73b8516b2a0539a323b42cc32",
        "resource": "https://agents.factstamp.dev/probe",
        "scheme": "exact"
      }
    ],
    "description": "A two-cent probe of the FactStamp engine: one small claim in, one cited answer out, receipted. Send a dated figure, a company name, a DOI/arXiv id or a package@version and get the verdict, the value and the source it rests on with our retrieval time — the same engine and the same sources the full-price doors read. Unknown is a valid answer and nothing is invented. Paid per call in USDC on Base; no pack code and no free tier.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "claim": "Australia's cash rate target is 3.60%",
              "kind": "figure"
            },
            "bodyType": "application/json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "amount_base_units": "20000",
              "claim": "Australia's cash rate target is 3.60%",
              "kind": "figure",
              "list_price_usd": 0.02,
              "paid_with": {
                "list_price_usd": 0.02,
                "rail": "x402_pay_per_call"
              },
              "probe": true,
              "receipt": {
                "alg": "HMAC-SHA256",
                "key_id": "probe-v1"
              },
              "retrieved_at": "2026-10-22T01:02:03.000Z",
              "source": {
                "data_as_of": "2026-08-01",
                "http_status": 200,
                "licence": null,
                "name": "Reserve Bank of Australia",
                "retrieved_at": "2026-10-22T01:02:03.000Z",
                "url": "https://www.rba.gov.au/statistics/cash-rate/"
              },
              "tier": "probe",
              "unknown": false,
              "value": 3.6,
              "verdict": "verified"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "additionalProperties": false,
          "properties": {
            "input": {
              "additionalProperties": true,
              "properties": {
                "body": {
                  "type": "object"
                },
                "bodyType": {
                  "const": "application/json"
                },
                "method": {
                  "const": "POST"
                },
                "type": {
                  "const": "http"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "additionalProperties": true,
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "const": "json"
                }
              },
              "required": [
                "type",
                "example"
              ],
              "type": "object"
            }
          },
          "required": [
            "input",
            "output"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-21T19:25:09.859Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-21T19:25:08.458Z"
    },
    "resource": "https://agents.factstamp.dev/probe",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "A two-cent probe of the FactStamp engine: one small claim in, one cited answer out, receipted. Send a dated figure, a company name, a DOI/arXiv id or a package@version and get the verdict, the value and the source it rests on with our retrieval time — the same engine and the same sources the full-price doors read. Unknown is a valid answer and nothing is invented. Paid per call in USDC on Base; no pack code and no free tier."
}

What the leaf hashes

{"body":"71fad33061684c80a5a2ae71449bd97852ebc3716769148c20ca6141a2f715ce","id":63628,"kind":"listing","method":"baseline/1","observed_us":1793025455224933,"prev":null,"subject":"x402_bazaar:https://agents.factstamp.dev/probe","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. 0xae266eaa3f7108fdb43e3e6c17894629e9134251c29d1255d11f3b199f7fcc36
2. 0xaf9bfa556d77c00be0c40c4a686d6d8303377c204ccff26774cd8fd25fbc1340
3. 0xedba2960aa0224b1d597d0397ed29c91bffbe719ace640301f2db3804f8d62c6
4. 0x246a7b3d74cd8eeb2923ebe9ae510c1add8a30855a29b2a459d84f056c1174db
5. 0x28b857e3da525cfab6f47781693c6edb8b489e1a2fc87671b7b76f12e5ad7de6
6. 0xe6c6c2b3e21b6552f880a3c013b4f34130d3ddcec378c854a4f6173cd07f1b21
7. 0x28760d8b2a65562f1b9b73030e90c71b630c566f84d086dfcc8f56019490054b
8. 0x3a7df177683d795f18b3f755c4441eb3800edf04176ed42230c25691262bb635
9. 0xefa6fbda900ed5d0d1468130ec6682fb0efc285576ec5a8c20f0ea937d888dcb
10. 0x3c54c01bf4318d5a836732de25aa152fd493cfc74e9e7d61b6833262a76c28e9
11. 0x3ed84d9e7fe1a3a53a5614d97b48e393d726ca06109e83696375afe5ad01fd8f
12. 0x51f06c175a7c946ebe50ef243d6f9370a8fe85c996e53eff19ffcc4585ea8c18
13. 0xe292b5a99219f136bce6647ce74b21240a1c7331d2475b1839220fd363c94217
14. 0x3b4dba7d874fc323b0a364140a9c60f37bf547fe671897653118a9873fe03420
15. 0x1a74ed3b3756b9cd946da49701bcec120ec88645013da99fa9eea60b39e1a570
16. 0x123ec8bee20ddc55223eeef5a4f4d6c4b6416515adbb911c56759f5cde56e452
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae