Does SPCXon / 比特币 match its issuer's published contract?

QED signs a canonical JSON payload. Fetch the public key from /.well-known/qed.json, then check the signature against this payload.

Canonical JSON

{"block":128342110,"chain":"bnb","checked_at":"2026-10-18T09:56:55Z","dev":false,"expires_at":"2026-10-19T09:56:55Z","issuer":"Ondo","pool":{"base":{"address":"0x18d0e455B3491E09210292d3953157A4Bf104444","balance":"33080669219623639619973","decimals":18,"symbol":"比特币"},"chain":"bnb","dex":"uniswap-v3","pool":"0xf0d83CC4c507120fa5B9001F3D704Ae7129ECF81","quote":{"address":"0xd0a58BC9D88D3FF48C0294Cb7e45937d0E41A928","balance":"3437984519344726962","decimals":18,"symbol":"SPCXon"}},"quote_share_of_supply":0.0001562985215020251,"reads":[{"block":128342110,"method":"eth_blockNumber","params":[],"result_hash":"db94d390303b3a0c8328cea3b1d2bb3e925463feeff230694bb3a9fa39449e62","slot":null},{"block":null,"method":"eth_call","params":["0xf0d83CC4c507120fa5B9001F3D704Ae7129ECF81","token0()"],"raw_result":"0x18d0e455b3491e09210292d3953157a4bf104444","result_hash":"8bdef4b93a8e327bcf767bd3f339c81d34d1067224b7efa85403b3e3b14f0a6a","slot":null},{"block":null,"method":"eth_call","params":["0xf0d83CC4c507120fa5B9001F3D704Ae7129ECF81","token1()"],"raw_result":"0xd0a58bc9d88d3ff48c0294cb7e45937d0e41a928","result_hash":"4800d6217cb0b5bbdc095c46730aeb618ca0c8b677948b021d1cf7e9481507a2","slot":null},{"block":null,"method":"eth_call","params":["0xf0d83CC4c507120fa5B9001F3D704Ae7129ECF81","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0xf0d83CC4c507120fa5B9001F3D704Ae7129ECF81","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0xf0d83CC4c507120fa5B9001F3D704Ae7129ECF81","factory()"],"raw_result":"0xdb1d10011ad0ff90774d0c6bb92e5c5c8b4461f7","result_hash":"4b482521d7cb760d72486691996fad9e93bcdcc2309e6fc4881175fe267d7fec","slot":null},{"block":null,"method":"eth_call","params":["0xf0d83CC4c507120fa5B9001F3D704Ae7129ECF81","fee()"],"raw_result":"3000","result_hash":"53232d7da9fd2a1931dcd44af08ec415dd52ab8ecc4037ef5e68eb3753978a2e","slot":null},{"block":null,"method":"eth_call","params":["0xdB1d10011AD0Ff90774D0C6Bb92e5C5c8b4461F7","getPool","0x18d0e455B3491E09210292d3953157A4Bf104444","0xd0a58BC9D88D3FF48C0294Cb7e45937d0E41A928","0xbb8"],"raw_result":"0xf0d83cc4c507120fa5b9001f3d704ae7129ecf81","result_hash":"fc0cbd2a35f6775e5859ae99f96b42a4f5e4b379b2376a63e2c2f82ef11b816b","slot":null},{"block":null,"method":"eth_call","params":["0x18d0e455B3491E09210292d3953157A4Bf104444","symbol()"],"raw_result":"Some(\"比特币\")","result_hash":"713201f538a68ecc1b2cfb0b153ffa8a29f7202e140546ed5e41cd6217f174c0","slot":null},{"block":null,"method":"eth_call","params":["0x18d0e455B3491E09210292d3953157A4Bf104444","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x18d0e455B3491E09210292d3953157A4Bf104444","balanceOf","0xf0d83CC4c507120fa5B9001F3D704Ae7129ECF81"],"raw_result":"Some(\"33080669219623639619973\")","result_hash":"1cdc9f436abf61b17b87385a46319f22d9f962099bd0d5bc1816294491bccc61","slot":null},{"block":null,"method":"eth_call","params":["0xd0a58BC9D88D3FF48C0294Cb7e45937d0E41A928","symbol()"],"raw_result":"Some(\"SPCXon\")","result_hash":"c6542914d1f0fba46d44885ece2850ebca64071033ed55e720d9bd9656b5c9ce","slot":null},{"block":null,"method":"eth_call","params":["0xd0a58BC9D88D3FF48C0294Cb7e45937d0E41A928","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xd0a58BC9D88D3FF48C0294Cb7e45937d0E41A928","balanceOf","0xf0d83CC4c507120fa5B9001F3D704Ae7129ECF81"],"raw_result":"Some(\"3437984519344726962\")","result_hash":"299c49ea0478aa22633ed553afbbf3ba1b3ab2cdec126a890d09fd3758d8368a","slot":null},{"block":null,"method":"eth_call","params":["0x18d0e455B3491E09210292d3953157A4Bf104444","symbol()"],"raw_result":"Some(\"比特币\")","result_hash":"713201f538a68ecc1b2cfb0b153ffa8a29f7202e140546ed5e41cd6217f174c0","slot":null},{"block":null,"method":"eth_call","params":["0x18d0e455B3491E09210292d3953157A4Bf104444","name()"],"raw_result":"Some(\"比特币\")","result_hash":"713201f538a68ecc1b2cfb0b153ffa8a29f7202e140546ed5e41cd6217f174c0","slot":null},{"block":null,"method":"eth_call","params":["0x18d0e455B3491E09210292d3953157A4Bf104444","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x18d0e455B3491E09210292d3953157A4Bf104444","totalSupply()"],"raw_result":"Some(\"1000000000000000000000000000\")","result_hash":"9a5063c327faec672db6b50450571675cbfbcc3766ebaf6832c3a9f6636ff4d0","slot":null},{"block":null,"method":"eth_call","params":["0xd0a58BC9D88D3FF48C0294Cb7e45937d0E41A928","symbol()"],"raw_result":"Some(\"SPCXon\")","result_hash":"c6542914d1f0f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(Ondo Tokenized)\")","result_hash":"8e183718b619bbadee2374ed07d48eb982d73a487ea95ae959dc63a2dc3ee082","slot":null},{"block":null,"method":"eth_call","params":["0xd0a58BC9D88D3FF48C0294Cb7e45937d0E41A928","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xd0a58BC9D88D3FF48C0294Cb7e45937d0E41A928","totalSupply()"],"raw_result":"Some(\"21996270254547367644981\")","result_hash":"ff21b724c49703233b625b14a9f3fc9f1c945fb86d0e2a13221b2dab443f4fc5","slot":null},{"block":null,"method":"eth_getCode","params":["0xd0a58BC9D88D3FF48C0294Cb7e45937d0E41A928","latest"],"result_hash":"94608f5be99dad7eba2f1291156fff602e3d7e462e4517d8f65af38ba0f4b7b4","slot":null},{"block":null,"method":"eth_getCode","params":["0xd0a58BC9D88D3FF48C0294Cb7e45937d0E41A928","latest"],"result_hash":"94608f5be99dad7eba2f1291156fff602e3d7e462e4517d8f65af38ba0f4b7b4","slot":null}],"registry_entry":{"chain":"bnb","contract":"0xd0a58BC9D88D3FF48C0294Cb7e45937d0E41A928","decimals":null,"issuer":"Ondo","last_checked":"2026-10-18T09:47:35Z","name":"SpaceX (Ondo Tokenized)","official_deployments":[{"address":"0xc9eef266834730340A55B6CC24621B31BAF55581","network":"Ethereum"},{"address":"0xd0a58BC9D88D3FF48C0294Cb7e45937d0E41A928","network":"BNB Chain"},{"address":"wzAyQTorWyoVXuJKj2x8EqKEGJpS13z6EWE9z5Aondo","network":"Solana"}],"source":"https://docs.ondo.finance/addresses.md","source_url":"https://www.dropbox.com/scl/fi/qjfxyg748mx0dwi6up86d/EXTERNAL-Ondo-GM-Tokens-Ondo-GM-Tokens.csv?rlkey=n3no1w78wrah3umsl0nr9s77i&e=2&st=spdit2q1&dl=1","ticker":"SPCX"},"registry_hash":"3143486c8ed17e52c07540b096bdf4ef50abfca368b23311d9290e9923561570","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xf0d83CC4c507120fa5B9001F3D704Ae7129ECF81","ticker":"SPCX","verdict":{"Verified":{"issuer":"Ondo","ticker":"SPCX"}},"version":1}

Signature

yzMcfBZca3/OhwV0UWgOBXbC6od0RbNGOl23x3f/s4ggChJIITo7KMHn7KAcOeDZePWl3VoWIsj1wAo6+IxOBQ==

API call

GET /api/attest/1d90ddef964d355750c4e0fc80fcb6c1da1aa9275d226bd56f50fda9af4ac334

1. Fetch the public key and attestation JSON, then verify the signature with the published key.
2. Canonicalize the payload with sorted object keys and no whitespace, then verify its SHA-256 attestation id.
3. Run the API call above and compare the returned payload, serial, signer, and signature with this certificate.