Does TLTon / 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":128391824,"chain":"bnb","checked_at":"2026-10-18T16:09:55Z","dev":false,"expires_at":"2026-10-19T16:09:55Z","issuer":"Ondo","pool":{"base":{"address":"0x55d398326f99059fF775485246999027B3197955","balance":"31851242410369993709397","decimals":18,"symbol":"USDT"},"chain":"bnb","dex":"pancake-v3","pool":"0x77e6b624d664150d96e13d99c68144b2a047e554","quote":{"address":"0xf69e40069aC227C11459E3f4e8a446b3401616b6","balance":"298496541809820312192","decimals":18,"symbol":"TLTon"}},"quote_share_of_supply":0.17799625308839687,"reads":[{"block":128391824,"method":"eth_blockNumber","params":[],"result_hash":"e697a819c65b047a05e9c18b41f3731be0f7fedd31f3a1596ffcbf08cc013ce9","slot":null},{"block":null,"method":"eth_call","params":["0x77e6b624d664150d96e13d99c68144b2a047e554","token0()"],"raw_result":"0x55d398326f99059ff775485246999027b3197955","result_hash":"66f63b72a2cc2125a9e796877d8894f3c7efb1d98419d7f1f9800b08f25cdc61","slot":null},{"block":null,"method":"eth_call","params":["0x77e6b624d664150d96e13d99c68144b2a047e554","token1()"],"raw_result":"0xf69e40069ac227c11459e3f4e8a446b3401616b6","result_hash":"ba452b59ca2c7875c12dabdd7ad710fbc9e21f5b29b3b19a16be4529ef96e25d","slot":null},{"block":null,"method":"eth_call","params":["0x77e6b624d664150d96e13d99c68144b2a047e554","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0x77e6b624d664150d96e13d99c68144b2a047e554","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x77e6b624d664150d96e13d99c68144b2a047e554","factory()"],"raw_result":"0x0bfbcf9fa4f9c56b0f40a671ad40e0805a091865","result_hash":"2e3d0bedb6ff98db8ecf6c7b57f2028219517abe46f0f5212ff489a2c45cafbd","slot":null},{"block":null,"method":"eth_call","params":["0x77e6b624d664150d96e13d99c68144b2a047e554","fee()"],"raw_result":"2500","result_hash":"c470156de4cb3620b0749c19d984d0666924d83d0ec37998dd6b637a87a2ec3b","slot":null},{"block":null,"method":"eth_call","params":["0x0BFbCF9fa4f9C56B0F40a671Ad40E0805A091865","getPool","0x55d398326f99059fF775485246999027B3197955","0xf69e40069aC227C11459E3f4e8a446b3401616b6","0x9c4"],"raw_result":"0x77e6b624d664150d96e13d99c68144b2a047e554","result_hash":"b69377511967dde1db1f983145f80476015f1be200977c8b5526b3958a7c25ae","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","0x77e6b624d664150d96e13d99c68144b2a047e554"],"raw_result":"Some(\"31851242410369993709397\")","result_hash":"2ad17f57ab02cb68d82eac2dbf955252ce215b8a8023cd86568f73490953f804","slot":null},{"block":null,"method":"eth_call","params":["0xf69e40069aC227C11459E3f4e8a446b3401616b6","symbol()"],"raw_result":"Some(\"TLTon\")","result_hash":"5d8fa92467d25cfc460cfe7ac8d6fa8b7b01f6a57d222c3550c2309e3c4aa692","slot":null},{"block":null,"method":"eth_call","params":["0xf69e40069aC227C11459E3f4e8a446b3401616b6","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xf69e40069aC227C11459E3f4e8a446b3401616b6","balanceOf","0x77e6b624d664150d96e13d99c68144b2a047e554"],"raw_result":"Some(\"298496541809820312192\")","result_hash":"bd33d9d6d65d25ab8a41d9da82a9f0d98c4ec60fa490980ba8b152b5bea65389","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":["0xf69e40069aC227C11459E3f4e8a446b3401616b6","symbol()"],"raw_result":"Some(\"TLTon\")","result_hash":"5d8fa92467d25cfc460cfe7ac8d6fa8b7b01f6a57d222c3550c2309e3c4aa692","slot":null},{"block":null,"method":"eth_call","params":["0xf69e40069aC227C11459E3f4e8a446b3401616b6","name()"],"raw_result":"Some(\"iShares 20+ Year Treasury Bond ETF (Ondo Tokenized)\")","result_hash":"8a39330ae30771ccb80bcc0e301acdff44e68c7e2a8d1e43f4a2ce7623998136","slot":null},{"block":null,"method":"eth_call","params":["0xf69e40069aC227C11459E3f4e8a446b3401616b6","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xf69e40069aC227C11459E3f4e8a446b3401616b6","totalSupply()"],"raw_result":"Some(\"1676982164683996678135\")","result_hash":"37676b97fce91ec2339d1d311d4bc130e5ee12b3ae460bb4888f6287c5c2f013","slot":null},{"block":null,"method":"eth_getCode","params":["0xf69e40069aC227C11459E3f4e8a446b3401616b6","latest"],"result_hash":"94608f5be99dad7eba2f1291156fff602e3d7e462e4517d8f65af38ba0f4b7b4","slot":null},{"block":null,"method":"eth_getCode","params":["0xf69e40069aC227C11459E3f4e8a446b3401616b6","latest"],"result_hash":"94608f5be99dad7eba2f1291156fff602e3d7e462e4517d8f65af38ba0f4b7b4","slot":null}],"registry_entry":{"chain":"bnb","contract":"0xf69e40069aC227C11459E3f4e8a446b3401616b6","decimals":null,"issuer":"Ondo","last_checked":"2026-10-18T09:47:35Z","name":"iShares 20+ Year Treasury Bond ETF (Ondo Tokenized)","official_deployments":[{"address":"0x992651BFeB9A0DCC4457610E284ba66D86489d4d","network":"Ethereum"},{"address":"0xf69e40069aC227C11459E3f4e8a446b3401616b6","network":"BNB Chain"},{"address":"KaSLSWByKy6b9FrCYXPEJoHmLpuFZtTCJk1F1Z9ondo","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":"TLT"},"registry_hash":"2bf13ff4020924ba1c74d8e732c3dd1609679a3b9a6dc8a796250beb0ae1b589","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x77e6b624d664150d96e13d99c68144b2a047e554","ticker":"TLT","verdict":{"Verified":{"issuer":"Ondo","ticker":"TLT"}},"version":1}

Signature

Wr0G7bwkSnqItpOwB/IYYGkeJc59vjms/q2XnA0nwP1tEQ8lM69M/5LJknMG2BDwfIDBzyXolp7zIxMbhm7KBQ==

API call

GET /api/attest/9b878b4de5d427d44fa2edc7b2e1ebe3cf5eebe345b9b9c3f260417c7e31ba35

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.