Does NKEon / 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":128391977,"chain":"bnb","checked_at":"2026-10-18T16:11:04Z","dev":false,"expires_at":"2026-10-19T16:11:04Z","issuer":"Ondo","pool":{"base":{"address":"0x04b5E199F2eC84f78B111035F57b16BeE448dB6F","balance":"18288053131544790008","decimals":18,"symbol":"NKEon"},"chain":"bnb","dex":"pancake-v3","pool":"0x07E9A5dcA4B3F46Ab9b87Bf8E18e0a358B5d97dF","quote":{"address":"0x55d398326f99059fF775485246999027B3197955","balance":"497272698705784756654","decimals":18,"symbol":"USDT"}},"quote_share_of_supply":0.00247963939572212,"reads":[{"block":128391977,"method":"eth_blockNumber","params":[],"result_hash":"8b21cb44f81257db4dd43c0b1cc8b86ab07846a52f212ebbff4c5dadc43816d9","slot":null},{"block":null,"method":"eth_call","params":["0x07E9A5dcA4B3F46Ab9b87Bf8E18e0a358B5d97dF","token0()"],"raw_result":"0x04b5e199f2ec84f78b111035f57b16bee448db6f","result_hash":"394b0e6e4a7c77e03724df6b798234e26759e078cfc7e490b68bc21c6bfa97b8","slot":null},{"block":null,"method":"eth_call","params":["0x07E9A5dcA4B3F46Ab9b87Bf8E18e0a358B5d97dF","token1()"],"raw_result":"0x55d398326f99059ff775485246999027b3197955","result_hash":"66f63b72a2cc2125a9e796877d8894f3c7efb1d98419d7f1f9800b08f25cdc61","slot":null},{"block":null,"method":"eth_call","params":["0x07E9A5dcA4B3F46Ab9b87Bf8E18e0a358B5d97dF","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0x07E9A5dcA4B3F46Ab9b87Bf8E18e0a358B5d97dF","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x07E9A5dcA4B3F46Ab9b87Bf8E18e0a358B5d97dF","factory()"],"raw_result":"0x0bfbcf9fa4f9c56b0f40a671ad40e0805a091865","result_hash":"2e3d0bedb6ff98db8ecf6c7b57f2028219517abe46f0f5212ff489a2c45cafbd","slot":null},{"block":null,"method":"eth_call","params":["0x07E9A5dcA4B3F46Ab9b87Bf8E18e0a358B5d97dF","fee()"],"raw_result":"10000","result_hash":"328d48ab2376d2f42d3af5ba69086143c8f5fe883ed195a8280b2154a5711a33","slot":null},{"block":null,"method":"eth_call","params":["0x0BFbCF9fa4f9C56B0F40a671Ad40E0805A091865","getPool","0x04b5E199F2eC84f78B111035F57b16BeE448dB6F","0x55d398326f99059fF775485246999027B3197955","0x2710"],"raw_result":"0x07e9a5dca4b3f46ab9b87bf8e18e0a358b5d97df","result_hash":"6b29d77b6c46cf4ea8b106ae09a75ee93fb32b84cc38d3339da3e77f36e9c0d9","slot":null},{"block":null,"method":"eth_call","params":["0x04b5E199F2eC84f78B111035F57b16BeE448dB6F","symbol()"],"raw_result":"Some(\"NKEon\")","result_hash":"07c9d7cf65ea89b48acde83ccbd7c078d8da0c36b1a456309dd06749e0b934e0","slot":null},{"block":null,"method":"eth_call","params":["0x04b5E199F2eC84f78B111035F57b16BeE448dB6F","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x04b5E199F2eC84f78B111035F57b16BeE448dB6F","balanceOf","0x07E9A5dcA4B3F46Ab9b87Bf8E18e0a358B5d97dF"],"raw_result":"Some(\"18288053131544790008\")","result_hash":"7905478cfb8d4d0a0e03dda3569089d7945c7f870e14a89ebdbd61cfba8952b1","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","0x07E9A5dcA4B3F46Ab9b87Bf8E18e0a358B5d97dF"],"raw_result":"Some(\"497272698705784756654\")","result_hash":"f95cc86493c407912afc9adce0ac1b3777725911865ab4ce65aabbce83e7fdd5","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":["0x04b5E199F2eC84f78B111035F57b16BeE448dB6F","symbol()"],"raw_result":"Some(\"NKEon\")","result_hash":"07c9d7cf65ea89b48acde83ccbd7c078d8da0c36b1a456309dd06749e0b934e0","slot":null},{"block":null,"method":"eth_call","params":["0x04b5E199F2eC84f78B111035F57b16BeE448dB6F","name()"],"raw_result":"Some(\"Nike (Ondo Tokenized)\")","result_hash":"0346952bd69b596c917c0a9e6c6501b55d6f09f84e71c8beb9ab90efab715fe1","slot":null},{"block":null,"method":"eth_call","params":["0x04b5E199F2eC84f78B111035F57b16BeE448dB6F","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x04b5E199F2eC84f78B111035F57b16BeE448dB6F","totalSupply()"],"raw_result":"Some(\"7375287375694780792655\")","result_hash":"53f614de73113b245afe583f06be4a71ef9a6d5efd2fa5f42273c7fa880242a2","slot":null},{"block":null,"method":"eth_getCode","params":["0x04b5E199F2eC84f78B111035F57b16BeE448dB6F","latest"],"result_hash":"94608f5be99dad7eba2f1291156fff602e3d7e462e4517d8f65af38ba0f4b7b4","slot":null},{"block":null,"method":"eth_getCode","params":["0x04b5E199F2eC84f78B111035F57b16BeE448dB6F","latest"],"result_hash":"94608f5be99dad7eba2f1291156fff602e3d7e462e4517d8f65af38ba0f4b7b4","slot":null}],"registry_entry":{"chain":"bnb","contract":"0x04b5E199F2eC84f78B111035F57b16BeE448dB6F","decimals":null,"issuer":"Ondo","last_checked":"2026-10-18T09:47:35Z","name":"Nike (Ondo Tokenized)","official_deployments":[{"address":"0xD8e26FcC879b30cB0a0B543925a2B3500f074D81","network":"Ethereum"},{"address":"0x04b5E199F2eC84f78B111035F57b16BeE448dB6F","network":"BNB Chain"},{"address":"g646pcdG2Rt5DH9WZzL7VVnVDWCCMTTrnktwE74ondo","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":"NKE"},"registry_hash":"2bf13ff4020924ba1c74d8e732c3dd1609679a3b9a6dc8a796250beb0ae1b589","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x07E9A5dcA4B3F46Ab9b87Bf8E18e0a358B5d97dF","ticker":"NKE","verdict":{"Verified":{"issuer":"Ondo","ticker":"NKE"}},"version":1}

Signature

Ad6JO8KHSUu7AGUfHT+Y9ptRUJ60Tre4IeCBc8/sZ65bFvsHeRv/RH1PKKqgWunIsbw4wdjPXTBQLs5Mo6u4DA==

API call

GET /api/attest/9b03be56d3010169d12c5cdbea8a831fae0e02156595c0317af1d7085a717b58

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.