Evidence row 67904

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

Kind: listing
About: source_record x402_bazaar:https://saylorinnovations.com/api/music/pitch-note
Recorded: 26 Oct 2026, 14:37 UTC
Previous row: None: the first of its kind about this subject
Body SHA-256: d79a5aa793e50200b49b7113a5387847d9275832523faae6138f765b8c4095b6
Leaf: 0x7a7094afffb4afa09cb9274c827ab6746340ecfca4095e25d3ce8c4b84861f26

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://saylorinnovations.com/api/music/pitch-note"
    ]
  ],
  "name": "Saylor Innovations  Pitch to Not",
  "owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:music:pitch-note",
          "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:pitch-note",
          "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:pitch-note",
          "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:pitch-note",
          "reference": "FymxefksCfc9K94LYfweGebA7zQjqVaZzDNrX75WpKvm",
          "session": "eyJhcnRpY2xlSWQiOiJtdXNpYzpwaXRjaC1ub3RlIiwicmVmZXJlbmNlIjoiRnlteGVma3NDZmM5Szk0TFlmd2VHZWJBN3pRanFWYVp6RE5yWDc1V3BLdm0iLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFUGpGV2RkNUF1ZnFTU3FlTTJxTjF4enliYXBDOEc0d0VHR2tad3lURHQxdiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5Mjk5NzM0NjQ1Nn0.f-LWxLTYoznwaKDiHn6HnNs-sKRnqFWDUvA7zAhnFgc"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
        "extra": {
          "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb",
          "memo": "saylor:music:pitch-note",
          "reference": "3zpRsTJqT2WYAvJFff1pZdXqCKFB8PCfiCm2z6oyHCFW",
          "session": "eyJhcnRpY2xlSWQiOiJtdXNpYzpwaXRjaC1ub3RlIiwicmVmZXJlbmNlIjoiM3pwUnNUSnFUMldZQXZKRmZmMXBaZFhxQ0tGQjhQQ2ZpQ20yejZveUhDRlciLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFczl2TUZyemFDRVJtSmZyRjRIMkZZRDRLQ29Oa1kxMU1jQ2U4QmVud05ZQiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5Mjk5NzM0NjQ1N30.s7KH-KESQGYKcBZIUEUc9gOhd3R20rLMT8HjwSr17FA"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "96334",
        "asset": "So11111111111111111111111111111111111111112",
        "extra": {
          "memo": "saylor:music:pitch-note",
          "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": "99314",
          "reference": "CW7k4PfeDJNrFKvxLZfhebPwk2iY96LiDwaTBRJBxbu6",
          "session": "eyJhcnRpY2xlSWQiOiJtdXNpYzpwaXRjaC1ub3RlIiwicmVmZXJlbmNlIjoiQ1c3azRQZmVESk5yRkt2eExaZmhlYlB3azJpWTk2TGlEd2FUQlJKQnhidTYiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOm51bGwsIm1pbkFtb3VudCI6OTYzMzQsImV4cCI6MTc5Mjk5NzM0NjQ1N30.Duexufm3BgIro0NqxOEDvYXBP6M9Hn-lQlZVOBp1TWg",
          "solUsdPrice": 100.69
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      }
    ],
    "description": "Nearest note, cents offset, MIDI, wavelength, harmonics and neighbors",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "a4": "440",
              "hz": "261.6"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "cents": 0,
              "note": "C4"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "a4": {
                      "description": "optional reference pitch for A4, default 440 (query)",
                      "type": "string"
                    },
                    "hz": {
                      "description": "optional frequency in hertz (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": "2026-10-26T06:47:06.499Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-26T06:47:06.11Z"
    },
    "resource": "https://saylorinnovations.com/api/music/pitch-note",
    "serviceName": "Saylor Innovations  Pitch to Not",
    "tags": [
      "music",
      "theory",
      "chords",
      "scales",
      "guitar"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Nearest note, cents offset, MIDI, wavelength, harmonics and neighbors"
}

What the leaf hashes

{"body":"d79a5aa793e50200b49b7113a5387847d9275832523faae6138f765b8c4095b6","id":67904,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793025464919590,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/music/pitch-note","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).

0x7a71f2f5b45eddd2a2de232dc9f5c1a2c0066728b5919f546b367fe517412ac7
0xf330a02f960b4ec3c36d7dbdc82c081c6e72dbaaba53507d3307d9d4c2ea9ffa
0x0c577482c1fa4b77892a7ea31133aa52ff3582f2910c845d6b1ed7388da28f0b
0xafb1a71399b607bada59feec0a4264f10d71f32b9be9b2fa88a33c5a9b1db34d
0xd797e2c64a2dc762768953933679d50c072b0f4583133ec107997b2dc9ee4c9d
0xfd7a0fd5e36af5234a13e0e39dc3ad626fd0505bfcef631c61abe613ca00e9a2
0xd3ed9c00b6a25b074c2358c16f978cc3f98c605d65188ee5559879c894bfb865
0x91df5f8d9639969ec523b1eeac4a9922f9591d3d7a7fa5a7766a9affa38aee99
0x86a07bb8ffbeab4d5adc5c3a59b797d56e7fd2802276ee6d05895dc4e8c35c04
0x72004cfd0b5574eac5ee651ce41187d0c3a331b4bdf0bdb385f7d93decec1860
0x1474b20023ac420a3be8200f14f9ac14f1ee93ff05411fa3760c28b2e50fb3dd
0xa6406b1a5540d26e0cbd03bb274a01c10968fadb17913a6043bb9427ddfb71ba
0x01c95624b1f2385ef774ee258a9ae58a4df07a1bdaa829de84e1d5201f3f39c2
0x7721d38652b6444b18e1193824e50490ade04851ce6221771f6e374c4527d80f
0x15039087bf60ae9b06b756ec3cbc299760e59923a438bbd91e34d105186db0ed
0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root: 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
Chained: 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
Published: On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae

How to check it · This row as JSON