Evidence row 122999

Observed 26 Oct 2026, 14:40 UTC, by baseline/1.

Kind: listing
About: source_record x402_bazaar:https://twin.unykorn.org/btc-block-at-height
Recorded: 26 Oct 2026, 14:40 UTC
Previous row: None: the first of its kind about this subject
Body SHA-256: 665d2f404e93662710d4d28be3b110c4931ae3ef8d33fd710f83a970bb454b14
Leaf: 0x2dc228441527884cc01ecb3321f5c911a64467f0e52df0e75a22998ad4d328b4

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://twin.unykorn.org/btc-block-at-height"
    ]
  ],
  "name": "twin.unykorn.org/btc-block-at-height",
  "owner_address": "0x7d9a65d06dcc435a52d5880c6310bd6e96c156db",
  "raw": {
    "accepts": [
      {
        "amount": "3000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x7d9a65d06dcc435a52D5880C6310Bd6E96c156DB",
        "scheme": "exact"
      },
      {
        "amount": "3000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxAmountRequired": "3000",
        "maxTimeoutSeconds": 300,
        "network": "eip155:137",
        "payTo": "0x7d9a65d06dcc435a52D5880C6310Bd6E96c156DB",
        "scheme": "exact"
      },
      {
        "amount": "3000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"
        },
        "maxAmountRequired": "3000",
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "52EqTZigRAnBphuYAuREjQJx5H5ryyc1RETpDR2dZFQp",
        "scheme": "exact"
      }
    ],
    "description": "Block hash at a given Bitcoin height — Genesis402 / UnyKorn Operator Network",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "params": {
                "height": 800000
              }
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "generated_at": "<iso8601>",
              "ok": true,
              "receipt": {
                "amount_usd": 0.003,
                "receipt_id": "g402-<16hex>",
                "tx_hash": "0x<64hex>"
              },
              "type": "btc-block-at-height"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "properties": {
                "body": {
                  "properties": {
                    "params": {
                      "properties": {
                        "height": {
                          "minimum": 0,
                          "type": "integer"
                        }
                      },
                      "type": "object"
                    }
                  },
                  "required": [
                    "params"
                  ],
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            },
            "output": {
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-01T21:10:29.612Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-01T21:10:28.666Z"
    },
    "resource": "https://twin.unykorn.org/btc-block-at-height",
    "tags": [
      "Bitcoin",
      "BTC",
      "UTXO",
      "non-EVM",
      "onchain data"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Block hash at a given Bitcoin height — Genesis402 / UnyKorn Operator Network"
}

What the leaf hashes

{"body":"665d2f404e93662710d4d28be3b110c4931ae3ef8d33fd710f83a970bb454b14","id":122999,"kind":"listing","method":"baseline/1","observed_us":1793025622518566,"prev":null,"subject":"x402_bazaar:https://twin.unykorn.org/btc-block-at-height","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).
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Day root: 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
Chained: 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
Published: On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae

How to check it · This row as JSON