Does DISon / 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":128341483,"chain":"bnb","checked_at":"2026-10-18T09:52:14Z","dev":false,"expires_at":"2026-10-19T09:52:14Z","issuer":"Ondo","pool":{"base":{"address":"0x55d398326f99059fF775485246999027B3197955","balance":"55682130144176258190088","decimals":18,"symbol":"USDT"},"chain":"bnb","dex":"pancake-v3","pool":"0x167c88898537eA7dC756d9B0bF7489A068f0b497","quote":{"address":"0xeEe9eeE593cB8f7946260B4066CBa7907f40ACFa","balance":"128910953212921444770","decimals":18,"symbol":"DISon"}},"quote_share_of_supply":0.09837947198530922,"reads":[{"block":128341483,"method":"eth_blockNumber","params":[],"result_hash":"aabd34783259fc9836c8442deebf604154827bf3facab18cc29127d30c9386f9","slot":null},{"block":null,"method":"eth_call","params":["0x167c88898537eA7dC756d9B0bF7489A068f0b497","token0()"],"raw_result":"0x55d398326f99059ff775485246999027b3197955","result_hash":"66f63b72a2cc2125a9e796877d8894f3c7efb1d98419d7f1f9800b08f25cdc61","slot":null},{"block":null,"method":"eth_call","params":["0x167c88898537eA7dC756d9B0bF7489A068f0b497","token1()"],"raw_result":"0xeee9eee593cb8f7946260b4066cba7907f40acfa","result_hash":"7f0b5ea560ac7839980bbcb668b7520e028ce268b15677461d5e34fbeaf77cbe","slot":null},{"block":null,"method":"eth_call","params":["0x167c88898537eA7dC756d9B0bF7489A068f0b497","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0x167c88898537eA7dC756d9B0bF7489A068f0b497","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x167c88898537eA7dC756d9B0bF7489A068f0b497","factory()"],"raw_result":"0x0bfbcf9fa4f9c56b0f40a671ad40e0805a091865","result_hash":"2e3d0bedb6ff98db8ecf6c7b57f2028219517abe46f0f5212ff489a2c45cafbd","slot":null},{"block":null,"method":"eth_call","params":["0x167c88898537eA7dC756d9B0bF7489A068f0b497","fee()"],"raw_result":"2500","result_hash":"c470156de4cb3620b0749c19d984d0666924d83d0ec37998dd6b637a87a2ec3b","slot":null},{"block":null,"method":"eth_call","params":["0x0BFbCF9fa4f9C56B0F40a671Ad40E0805A091865","getPool","0x55d398326f99059fF775485246999027B3197955","0xeEe9eeE593cB8f7946260B4066CBa7907f40ACFa","0x9c4"],"raw_result":"0x167c88898537ea7dc756d9b0bf7489a068f0b497","result_hash":"6c8672a190e0b186b1f73b914ce7e7fc4a6ac7f0e05891eca44432e62ae627b7","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","0x167c88898537eA7dC756d9B0bF7489A068f0b497"],"raw_result":"Some(\"55682130144176258190088\")","result_hash":"5967a3a823c4d7accfa7b7ac77fe4c7ed641d37b6f3b6b28e8dcc81ecb612e7c","slot":null},{"block":null,"method":"eth_call","params":["0xeEe9eeE593cB8f7946260B4066CBa7907f40ACFa","symbol()"],"raw_result":"Some(\"DISon\")","result_hash":"7b3a6b55aa9d1c2562de91036e0cf5ec5a4cba92623fdbe0dfb831adee3b1958","slot":null},{"block":null,"method":"eth_call","params":["0xeEe9eeE593cB8f7946260B4066CBa7907f40ACFa","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xeEe9eeE593cB8f7946260B4066CBa7907f40ACFa","balanceOf","0x167c88898537eA7dC756d9B0bF7489A068f0b497"],"raw_result":"Some(\"128910953212921444770\")","result_hash":"d995e2954373036fe9238e22e3d73ecd3a3f408461449852f381548046ef0530","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":["0xeEe9eeE593cB8f7946260B4066CBa7907f40ACFa","symbol()"],"raw_result":"Some(\"DISon\")","result_hash":"7b3a6b55aa9d1c2562de91036e0cf5ec5a4cba92623fdbe0dfb831adee3b1958","slot":null},{"block":null,"method":"eth_call","params":["0xeEe9eeE593cB8f7946260B4066CBa7907f40ACFa","name()"],"raw_result":"Some(\"Disney (Ondo Tokenized)\")","result_hash":"580a4eecbb20400c6a39cd53610c2958ac2f793d8003c55670d71765b97d63a2","slot":null},{"block":null,"method":"eth_call","params":["0xeEe9eeE593cB8f7946260B4066CBa7907f40ACFa","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xeEe9eeE593cB8f7946260B4066CBa7907f40ACFa","totalSupply()"],"raw_result":"Some(\"1310344024129052221458\")","result_hash":"32f7c241ad700ae0986c7a2b5a40357899a2c5ed13be49fff31c5759527e4d7e","slot":null},{"block":null,"method":"eth_getCode","params":["0xeEe9eeE593cB8f7946260B4066CBa7907f40ACFa","latest"],"result_hash":"94608f5be99dad7eba2f1291156fff602e3d7e462e4517d8f65af38ba0f4b7b4","slot":null},{"block":null,"method":"eth_getCode","params":["0xeEe9eeE593cB8f7946260B4066CBa7907f40ACFa","latest"],"result_hash":"94608f5be99dad7eba2f1291156fff602e3d7e462e4517d8f65af38ba0f4b7b4","slot":null}],"registry_entry":{"chain":"bnb","contract":"0xeEe9eeE593cB8f7946260B4066CBa7907f40ACFa","decimals":null,"issuer":"Ondo","last_checked":"2026-10-18T09:47:35Z","name":"Disney (Ondo Tokenized)","official_deployments":[{"address":"0xc3D93B45249E8E06cfeB01d25A96337E8893265d","network":"Ethereum"},{"address":"0xeEe9eeE593cB8f7946260B4066CBa7907f40ACFa","network":"BNB Chain"},{"address":"mJf1xT3suXtkXBCfZcE9oUUuyxkvSgqYBWiX7v1ondo","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":"DIS"},"registry_hash":"3143486c8ed17e52c07540b096bdf4ef50abfca368b23311d9290e9923561570","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x167c88898537eA7dC756d9B0bF7489A068f0b497","ticker":"DIS","verdict":{"Verified":{"issuer":"Ondo","ticker":"DIS"}},"version":1}

Signature

ATdnc1LbjNlUP9hag2mpKIGdiR8fRFpN9fPX6T8PN9RwYuJ8e29hFfWJcP9v6JX4DIRbL8LAgTJViL+6Dk0/AA==

API call

GET /api/attest/6a822d5e8b8bc4f948d75afa96c47c9e9a45e7f6d6308acd45e27b21d62a7b04

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.