Does NVDAon / USDT 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":128391443,"chain":"bnb","checked_at":"2026-10-18T16:07:03Z","dev":false,"expires_at":"2026-10-19T16:07:03Z","issuer":"Ondo","pool":{"base":{"address":"0x55d398326f99059fF775485246999027B3197955","balance":"3654545724418883597325","decimals":18,"symbol":"USDT"},"chain":"bnb","dex":"pancake-v3","pool":"0xB90BDBFBdfFd4Af5a636b5805539eDeafb969308","quote":{"address":"0xA9eE28C80f960B889dFbd1902055218cBa016F75","balance":"27122971183058432306","decimals":18,"symbol":"NVDAon"}},"quote_share_of_supply":0.00037991483289952314,"reads":[{"block":128391443,"method":"eth_blockNumber","params":[],"result_hash":"e395af660c2ec9ba2786d754b0ef811c0bef42b91c423b53398ca292b1febbe1","slot":null},{"block":null,"method":"eth_call","params":["0xB90BDBFBdfFd4Af5a636b5805539eDeafb969308","token0()"],"raw_result":"0x55d398326f99059ff775485246999027b3197955","result_hash":"66f63b72a2cc2125a9e796877d8894f3c7efb1d98419d7f1f9800b08f25cdc61","slot":null},{"block":null,"method":"eth_call","params":["0xB90BDBFBdfFd4Af5a636b5805539eDeafb969308","token1()"],"raw_result":"0xa9ee28c80f960b889dfbd1902055218cba016f75","result_hash":"dc785ff906c5eefbf179e61f9d0e92d14903c2c771e46fc613122ca2a95017b8","slot":null},{"block":null,"method":"eth_call","params":["0xB90BDBFBdfFd4Af5a636b5805539eDeafb969308","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0xB90BDBFBdfFd4Af5a636b5805539eDeafb969308","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0xB90BDBFBdfFd4Af5a636b5805539eDeafb969308","factory()"],"raw_result":"0x0bfbcf9fa4f9c56b0f40a671ad40e0805a091865","result_hash":"2e3d0bedb6ff98db8ecf6c7b57f2028219517abe46f0f5212ff489a2c45cafbd","slot":null},{"block":null,"method":"eth_call","params":["0xB90BDBFBdfFd4Af5a636b5805539eDeafb969308","fee()"],"raw_result":"10000","result_hash":"328d48ab2376d2f42d3af5ba69086143c8f5fe883ed195a8280b2154a5711a33","slot":null},{"block":null,"method":"eth_call","params":["0x0BFbCF9fa4f9C56B0F40a671Ad40E0805A091865","getPool","0x55d398326f99059fF775485246999027B3197955","0xA9eE28C80f960B889dFbd1902055218cBa016F75","0x2710"],"raw_result":"0xb90bdbfbdffd4af5a636b5805539edeafb969308","result_hash":"03a796d15453f4bd0d24b26b2b526b111d5e87f827050b833330fede2cf85446","slot":null},{"block":null,"method":"eth_call","params":["0x55d398326f99059fF775485246999027B3197955","symbol()"],"raw_result":"Some(\"USDT\")","result_hash":"a851493323e1198c0940c2b2ca5c59e97da9c6f50f63f0c09779709ef2572f84","slot":null},{"block":null,"method":"eth_call","params":["0x55d398326f99059fF775485246999027B3197955","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x55d398326f99059fF775485246999027B3197955","balanceOf","0xB90BDBFBdfFd4Af5a636b5805539eDeafb969308"],"raw_result":"Some(\"3654545724418883597325\")","result_hash":"9322119d55ce45d5287d51fdf5b1b1e97091d417c944dce690ee0c662f92abde","slot":null},{"block":null,"method":"eth_call","params":["0xA9eE28C80f960B889dFbd1902055218cBa016F75","symbol()"],"raw_result":"Some(\"NVDAon\")","result_hash":"46c43db2f5276b496d913fac27ac99eb51d6b037736cff400a31e742440484fd","slot":null},{"block":null,"method":"eth_call","params":["0xA9eE28C80f960B889dFbd1902055218cBa016F75","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xA9eE28C80f960B889dFbd1902055218cBa016F75","balanceOf","0xB90BDBFBdfFd4Af5a636b5805539eDeafb969308"],"raw_result":"Some(\"27122971183058432306\")","result_hash":"f091afd84895974fef505c083a30059d61aa9837b5176072a2aea79888350d62","slot":null},{"block":null,"method":"eth_call","params":["0x55d398326f99059fF775485246999027B3197955","symbol()"],"raw_result":"Some(\"USDT\")","result_hash":"a851493323e1198c0940c2b2ca5c59e97da9c6f50f63f0c09779709ef2572f84","slot":null},{"block":null,"method":"eth_call","params":["0x55d398326f99059fF775485246999027B3197955","name()"],"raw_result":"Some(\"Tether USD\")","result_hash":"8f7cfea6e15ea5712d4bf603e3223e8de9dfdee3c5fe9a25ec1181218bd425ad","slot":null},{"block":null,"method":"eth_call","params":["0x55d398326f99059fF775485246999027B3197955","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x55d398326f99059fF775485246999027B3197955","totalSupply()"],"raw_result":"Some(\"9184991859520259774116723649\")","result_hash":"b5a4e3e312d5f88f7b6f5d44368633422f48dda22b217c1ece79f64edd5719c9","slot":null},{"block":null,"method":"eth_call","params":["0xA9eE28C80f960B889dFbd1902055218cBa016F75","symbol()"],"raw_result":"Some(\"NVDAon\")","result_hash":"46c43db2f5276b496d913fac27ac99eb51d6b037736cff400a31e742440484fd","slot":null},{"block":null,"method":"eth_call","params":["0xA9eE28C80f960B889dFbd1902055218cBa016F75","name()"],"raw_result":"Some(\"NVIDIA (Ondo Tokenized)\")","result_hash":"cbfbccf105c436b16e881eff4a8ca524fd0008d69f2f09914242b75219061f2e","slot":null},{"block":null,"method":"eth_call","params":["0xA9eE28C80f960B889dFbd1902055218cBa016F75","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xA9eE28C80f960B889dFbd1902055218cBa016F75","totalSupply()"],"raw_result":"Some(\"71392240666296121842989\")","result_hash":"343515dd86ae7d1395e476b71c2ff4ada5b5af68a6eb38bfb591055e7d76ef98","slot":null},{"block":null,"method":"eth_getCode","params":["0xA9eE28C80f960B889dFbd1902055218cBa016F75","latest"],"result_hash":"94608f5be99dad7eba2f1291156fff602e3d7e462e4517d8f65af38ba0f4b7b4","slot":null},{"block":null,"method":"eth_getCode","params":["0xA9eE28C80f960B889dFbd1902055218cBa016F75","latest"],"result_hash":"94608f5be99dad7eba2f1291156fff602e3d7e462e4517d8f65af38ba0f4b7b4","slot":null}],"registry_entry":{"chain":"bnb","contract":"0xA9eE28C80f960B889dFbd1902055218cBa016F75","decimals":null,"issuer":"Ondo","last_checked":"2026-10-18T09:47:35Z","name":"NVIDIA (Ondo Tokenized)","official_deployments":[{"address":"0x2D1F7226Bd1F780AF6B9A49DCC0aE00E8Df4bDEE","network":"Ethereum"},{"address":"0xA9eE28C80f960B889dFbd1902055218cBa016F75","network":"BNB Chain"},{"address":"gEGtLTPNQ7jcg25zTetkbmF7teoDLcrfTnQfmn2ondo","network":"Solana"},{"address":"0xB989ad9b91886b1Aaed8DaADb26F028b29b40945","network":"HyperEVM"}],"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":"NVDA"},"registry_hash":"2bf13ff4020924ba1c74d8e732c3dd1609679a3b9a6dc8a796250beb0ae1b589","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xB90BDBFBdfFd4Af5a636b5805539eDeafb969308","ticker":"NVDA","verdict":{"Verified":{"issuer":"Ondo","ticker":"NVDA"}},"version":1}

Signature

VPWY+cs/xv0umy6DiC++9y15uusaSwckNKLnbriaUJk6i8LIvAgLctLpwc5stwsLENFalxqvOkSy753g8Uy8CQ==

API call

GET /api/attest/518982ffb6eb96c211c21bd5c3b7e2d010b47cc9c86aabb1acd1302d63f99e23

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.