Does SGOVon / 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":128391856,"chain":"bnb","checked_at":"2026-10-18T16:10:09Z","dev":false,"expires_at":"2026-10-19T16:10:09Z","issuer":"Ondo","pool":{"base":{"address":"0x55d398326f99059fF775485246999027B3197955","balance":"23473431575483380336177","decimals":18,"symbol":"USDT"},"chain":"bnb","dex":"pancake-v3","pool":"0xE0F4C53D777383cc77aDFa89087A9c877586F0dF","quote":{"address":"0xc008c5F579ec1450F20099c39F587547e27c7523","balance":"329598008313150328011","decimals":18,"symbol":"SGOVon"}},"quote_share_of_supply":0.027353320703668173,"reads":[{"block":128391856,"method":"eth_blockNumber","params":[],"result_hash":"143cd4f65ea1f2fd952d9c2dedb5a7fe38ef646994c591d22852cab766f7555f","slot":null},{"block":null,"method":"eth_call","params":["0xE0F4C53D777383cc77aDFa89087A9c877586F0dF","token0()"],"raw_result":"0x55d398326f99059ff775485246999027b3197955","result_hash":"66f63b72a2cc2125a9e796877d8894f3c7efb1d98419d7f1f9800b08f25cdc61","slot":null},{"block":null,"method":"eth_call","params":["0xE0F4C53D777383cc77aDFa89087A9c877586F0dF","token1()"],"raw_result":"0xc008c5f579ec1450f20099c39f587547e27c7523","result_hash":"3da513055e2d2422ab19d648e72bae55a61cab79e9c970dd6181c3602c56cf84","slot":null},{"block":null,"method":"eth_call","params":["0xE0F4C53D777383cc77aDFa89087A9c877586F0dF","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0xE0F4C53D777383cc77aDFa89087A9c877586F0dF","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0xE0F4C53D777383cc77aDFa89087A9c877586F0dF","factory()"],"raw_result":"0x0bfbcf9fa4f9c56b0f40a671ad40e0805a091865","result_hash":"2e3d0bedb6ff98db8ecf6c7b57f2028219517abe46f0f5212ff489a2c45cafbd","slot":null},{"block":null,"method":"eth_call","params":["0xE0F4C53D777383cc77aDFa89087A9c877586F0dF","fee()"],"raw_result":"2500","result_hash":"c470156de4cb3620b0749c19d984d0666924d83d0ec37998dd6b637a87a2ec3b","slot":null},{"block":null,"method":"eth_call","params":["0x0BFbCF9fa4f9C56B0F40a671Ad40E0805A091865","getPool","0x55d398326f99059fF775485246999027B3197955","0xc008c5F579ec1450F20099c39F587547e27c7523","0x9c4"],"raw_result":"0xe0f4c53d777383cc77adfa89087a9c877586f0df","result_hash":"241555cc6c6eb0db4eb037af77b4bf30f619458e58b1a571de75816cb1a2cb35","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","0xE0F4C53D777383cc77aDFa89087A9c877586F0dF"],"raw_result":"Some(\"23473431575483380336177\")","result_hash":"78aeed1c2acedb5504854e59c4425ffac84224996eeef078257c622d7610b39d","slot":null},{"block":null,"method":"eth_call","params":["0xc008c5F579ec1450F20099c39F587547e27c7523","symbol()"],"raw_result":"Some(\"SGOVon\")","result_hash":"cb0895cd3548a1a5e62bb4e1373ca76441988175c1c6a7d06de937416854da4d","slot":null},{"block":null,"method":"eth_call","params":["0xc008c5F579ec1450F20099c39F587547e27c7523","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xc008c5F579ec1450F20099c39F587547e27c7523","balanceOf","0xE0F4C53D777383cc77aDFa89087A9c877586F0dF"],"raw_result":"Some(\"329598008313150328011\")","result_hash":"b67d76d182b22565d67854c1a525d4812d1cfa27e25df38c404ae7f355161844","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":["0xc008c5F579ec1450F20099c39F587547e27c7523","symbol()"],"raw_result":"Some(\"SGOVon\")","result_hash":"cb0895cd3548a1a5e62bb4e1373ca76441988175c1c6a7d06de937416854da4d","slot":null},{"block":null,"method":"eth_call","params":["0xc008c5F579ec1450F20099c39F587547e27c7523","name()"],"raw_result":"Some(\"iShares 0-3 Month Treasury Bond ETF (Ondo Tokenized)\")","result_hash":"6624fc85ac8aaaa1ebde9a8baabc6de05a60c9d67c4001695a1dc55451208a56","slot":null},{"block":null,"method":"eth_call","params":["0xc008c5F579ec1450F20099c39F587547e27c7523","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xc008c5F579ec1450F20099c39F587547e27c7523","totalSupply()"],"raw_result":"Some(\"12049652467568594617525\")","result_hash":"31e6d8e63e436d90bfb77b3108c2ddc8738b9e0b2059b06a2cd4a326279da6e0","slot":null},{"block":null,"method":"eth_getCode","params":["0xc008c5F579ec1450F20099c39F587547e27c7523","latest"],"result_hash":"94608f5be99dad7eba2f1291156fff602e3d7e462e4517d8f65af38ba0f4b7b4","slot":null},{"block":null,"method":"eth_getCode","params":["0xc008c5F579ec1450F20099c39F587547e27c7523","latest"],"result_hash":"94608f5be99dad7eba2f1291156fff602e3d7e462e4517d8f65af38ba0f4b7b4","slot":null}],"registry_entry":{"chain":"bnb","contract":"0xc008c5F579ec1450F20099c39F587547e27c7523","decimals":null,"issuer":"Ondo","last_checked":"2026-10-18T09:47:35Z","name":"iShares 0-3 Month Treasury Bond ETF (Ondo Tokenized)","official_deployments":[{"address":"0x8De5D49725550f7b318b2FA0f1B1F118E98E8D0F","network":"Ethereum"},{"address":"0xc008c5F579ec1450F20099c39F587547e27c7523","network":"BNB Chain"},{"address":"HjrN6ChZK2QRL6hMXayjGPLFvxhgjwKEy135VRjondo","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":"SGOV"},"registry_hash":"2bf13ff4020924ba1c74d8e732c3dd1609679a3b9a6dc8a796250beb0ae1b589","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xE0F4C53D777383cc77aDFa89087A9c877586F0dF","ticker":"SGOV","verdict":{"Verified":{"issuer":"Ondo","ticker":"SGOV"}},"version":1}

Signature

WD3U3jTwMdJlurjwQM2kzdY45GlaOFdiCXb4lBw85rC5Kb0lnv1L3h+C+ba4zCpZqM+78zXZX0qOtZ1CSICkDA==

API call

GET /api/attest/b23830665a0bd2893976cbe8a9f7054d55edd5fe4132314287173b676c6b7c67

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.