Evidence row 67894

Observed 26 Oct 2026, 14:37 UTC, by sync.x402_bazaar/1.

Kind: listing
About: source_record x402_bazaar:https://saylorinnovations.com/api/music/key-finder
Recorded: 26 Oct 2026, 14:37 UTC
Previous row: None: the first of its kind about this subject
Body SHA-256: 3a5e657a0d968c4f6e43d03cb4a4ae3e47cb9d69677c5fc5be2ed344c683dc89
Leaf: 0x3178a01813cf3085d0a0c1ebeeeffaf7050a90ba280c37d33d10d429da4ac552

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://saylorinnovations.com/api/music/key-finder"
    ]
  ],
  "name": "Saylor Innovations  Key and Scal",
  "owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:music:key-finder",
          "name": "USD Coin",
          "note": "Base settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:8453",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:music:key-finder",
          "name": "USD Coin",
          "note": "Polygon settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:137",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:music:key-finder",
          "name": "USD Coin",
          "note": "Arbitrum settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:42161",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb",
          "memo": "saylor:music:key-finder",
          "reference": "FW2nJdhuy6pkijNPDjrYMp1MnPKsP67JoXqAS1k8SXEd",
          "session": "eyJhcnRpY2xlSWQiOiJtdXNpYzprZXktZmluZGVyIiwicmVmZXJlbmNlIjoiRlcybkpkaHV5NnBraWpOUERqcllNcDFNblBLc1A2N0pvWHFBUzFrOFNYRWQiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFUGpGV2RkNUF1ZnFTU3FlTTJxTjF4enliYXBDOEc0d0VHR2tad3lURHQxdiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5Mjk5NzM2NDg4Nn0.EjwBhhuH0af51sKQo714vAQTOuQa4Nm_O_hM9ROh8HY"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
        "extra": {
          "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb",
          "memo": "saylor:music:key-finder",
          "reference": "5wADd8D2JoGC3Zzz3eJ267X8b6EN4rwVGM1ZrqjzCXZE",
          "session": "eyJhcnRpY2xlSWQiOiJtdXNpYzprZXktZmluZGVyIiwicmVmZXJlbmNlIjoiNXdBRGQ4RDJKb0dDM1p6ejNlSjI2N1g4YjZFTjRyd1ZHTTFacnFqekNYWkUiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFczl2TUZyemFDRVJtSmZyRjRIMkZZRDRLQ29Oa1kxMU1jQ2U4QmVud05ZQiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5Mjk5NzM2NDg4N30.JB6sQ85VYgTOUmotdaiBa0sWobeUF5jmHkj9lhAkD1Q"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "96344",
        "asset": "So11111111111111111111111111111111111111112",
        "extra": {
          "memo": "saylor:music:key-finder",
          "native": true,
          "note": "Native SOL: send lamports with a system transfer, not an SPL transfer. Price is quoted live and this quote expires in 120s.",
          "quotedLamports": "99324",
          "reference": "BKn3maYGmgo4zU9pkrncAH6JbFg62yFDRkMmwi6XaGsG",
          "session": "eyJhcnRpY2xlSWQiOiJtdXNpYzprZXktZmluZGVyIiwicmVmZXJlbmNlIjoiQktuM21hWUdtZ280elU5cGtybmNBSDZKYkZnNjJ5RkRSa01td2k2WGFHc0ciLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOm51bGwsIm1pbkFtb3VudCI6OTYzNDQsImV4cCI6MTc5Mjk5NzM2NDg4N30.l_dszst8W58h6zkJcHBHJgJLb7HN2XmQJN2oDqpVPVM",
          "solUsdPrice": 100.68
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      }
    ],
    "description": "Ranked candidate keys, out-of-key notes, modes and Roman numeral analysis",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "chords": "Am F C G E7 Dm",
              "notes": ""
            },
            "type": "http"
          },
          "output": {
            "example": {
              "best_key": "A minor",
              "confidence_percent": 89
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "chords": {
                      "description": "optional chords such as C Am F G7 (query)",
                      "type": "string"
                    },
                    "notes": {
                      "description": "optional notes separated by spaces, commas or dashes, with optional weights as note:count for example C:8 E:4 G:5 A:3 (query)",
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "const": "json",
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1792548358/bazaar-icons/bc5e2b3d111ebbef.jpg",
    "lastUpdated": "2026-10-26T06:47:24.928Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-26T06:47:24.767Z"
    },
    "resource": "https://saylorinnovations.com/api/music/key-finder",
    "serviceName": "Saylor Innovations  Key and Scal",
    "tags": [
      "music",
      "theory",
      "chords",
      "scales",
      "guitar"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Ranked candidate keys, out-of-key notes, modes and Roman numeral analysis"
}

What the leaf hashes

{"body":"3a5e657a0d968c4f6e43d03cb4a4ae3e47cb9d69677c5fc5be2ed344c683dc89","id":67894,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793025464909320,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/music/key-finder","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