Does AMZNon / WBNB 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":128391864,"chain":"bnb","checked_at":"2026-10-18T16:10:13Z","dev":false,"expires_at":"2026-10-19T16:10:13Z","issuer":"Ondo","pool":{"base":{"address":"0x4553cFe1C09f37f38b12dC509F676964e392F8Fc","balance":"12549823543665376402","decimals":18,"symbol":"AMZNon"},"chain":"bnb","dex":"pancake-v2","pool":"0x8617Ba6DEEE616694601ADc41Ab7ffE0e610907E","quote":{"address":"0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c","balance":"4333852367386154651","decimals":18,"symbol":"WBNB"}},"quote_share_of_supply":0.0010698140950338058,"reads":[{"block":128391864,"method":"eth_blockNumber","params":[],"result_hash":"cd80df269830a12d0601500820987a643dbcdf2b8bf39c6dfbdb6ce494461697","slot":null},{"block":null,"method":"eth_call","params":["0x8617Ba6DEEE616694601ADc41Ab7ffE0e610907E","token0()"],"raw_result":"0x4553cfe1c09f37f38b12dc509f676964e392f8fc","result_hash":"37b5ea50e30195f251b6139bba22d98879b55e738ee4ebb48ea3701f4f0c307b","slot":null},{"block":null,"method":"eth_call","params":["0x8617Ba6DEEE616694601ADc41Ab7ffE0e610907E","token1()"],"raw_result":"0xbb4cdb9cbd36b01bd1cbaebf2de08d9173bc095c","result_hash":"edf9093bc9c27415917a34d81f1d628432fe528340b4b958d0cedeaab27cd622","slot":null},{"block":null,"method":"eth_call","params":["0x8617Ba6DEEE616694601ADc41Ab7ffE0e610907E","getReserves()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x8617Ba6DEEE616694601ADc41Ab7ffE0e610907E","factory()"],"raw_result":"0xca143ce32fe78f1f7019d7d551a6402fc5350c73","result_hash":"cca9f0708cbe3ba281b9d1b8ebd0a086cc47571f860d681f7f16e9e8a73617f9","slot":null},{"block":null,"method":"eth_call","params":["0xcA143Ce32Fe78f1f7019d7d551a6402fC5350c73","getPair","0x4553cFe1C09f37f38b12dC509F676964e392F8Fc","0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c"],"raw_result":"0x8617ba6deee616694601adc41ab7ffe0e610907e","result_hash":"4adb2c5ff60afc6537338e7769db07892f9d20381d2075d7f6ae872c021013a3","slot":null},{"block":null,"method":"eth_call","params":["0x4553cFe1C09f37f38b12dC509F676964e392F8Fc","symbol()"],"raw_result":"Some(\"AMZNon\")","result_hash":"ba5de2133a6e5cdfdf3744e9c27c84cd18c7d5f63eb613f5a0fe328e76635b94","slot":null},{"block":null,"method":"eth_call","params":["0x4553cFe1C09f37f38b12dC509F676964e392F8Fc","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x4553cFe1C09f37f38b12dC509F676964e392F8Fc","balanceOf","0x8617Ba6DEEE616694601ADc41Ab7ffE0e610907E"],"raw_result":"Some(\"12549823543665376402\")","result_hash":"830cadf618084c6ba8f51718a2bfa5cdafded1d17dcbb396dbad41d16ad18f98","slot":null},{"block":null,"method":"eth_call","params":["0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c","symbol()"],"raw_result":"Some(\"WBNB\")","result_hash":"911f77865aa0084e0926a82c6fef3299aaf8e69c9a280cbe3b7ccebbad7abd1b","slot":null},{"block":null,"method":"eth_call","params":["0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c","balanceOf","0x8617Ba6DEEE616694601ADc41Ab7ffE0e610907E"],"raw_result":"Some(\"4333852367386154651\")","result_hash":"a1b59eb503f352e7c7e31b7cdce626956962675a51a659ff79e8ab06fb38e0db","slot":null},{"block":null,"method":"eth_call","params":["0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c","symbol()"],"raw_result":"Some(\"WBNB\")","result_hash":"911f77865aa0084e0926a82c6fef3299aaf8e69c9a280cbe3b7ccebbad7abd1b","slot":null},{"block":null,"method":"eth_call","params":["0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c","name()"],"raw_result":"Some(\"Wrapped BNB\")","result_hash":"4b2d7b1bce048707fce6a8d05f50e5a1c268f1b0df9fdc7f497bba9ee6f295a2","slot":null},{"block":null,"method":"eth_call","params":["0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c","totalSupply()"],"raw_result":"Some(\"1556825574106840947696440\")","result_hash":"2c28fde596dec25b71094584346323a18be55d539983aeecca2335047f1ba452","slot":null},{"block":null,"method":"eth_call","params":["0x4553cFe1C09f37f38b12dC509F676964e392F8Fc","symbol()"],"raw_result":"Some(\"AMZNon\")","result_hash":"ba5de2133a6e5cdfdf3744e9c27c84cd18c7d5f63eb613f5a0fe328e76635b94","slot":null},{"block":null,"method":"eth_call","params":["0x4553cFe1C09f37f38b12dC509F676964e392F8Fc","name()"],"raw_result":"Some(\"Amazon (Ondo Tokenized)\")","result_hash":"826bd88a3a85211ee8860955aa9de4a86a57a8723fc595f4d68fcaf071ecf36c","slot":null},{"block":null,"method":"eth_call","params":["0x4553cFe1C09f37f38b12dC509F676964e392F8Fc","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x4553cFe1C09f37f38b12dC509F676964e392F8Fc","totalSupply()"],"raw_result":"Some(\"11730845201912213154478\")","result_hash":"32c9cf433f248427d1ec0e6a878a2ad0967846ff4e631c8be788dc9898aa232f","slot":null},{"block":null,"method":"eth_getCode","params":["0x4553cFe1C09f37f38b12dC509F676964e392F8Fc","latest"],"result_hash":"94608f5be99dad7eba2f1291156fff602e3d7e462e4517d8f65af38ba0f4b7b4","slot":null},{"block":null,"method":"eth_getCode","params":["0x4553cFe1C09f37f38b12dC509F676964e392F8Fc","latest"],"result_hash":"94608f5be99dad7eba2f1291156fff602e3d7e462e4517d8f65af38ba0f4b7b4","slot":null}],"registry_entry":{"chain":"bnb","contract":"0x4553cFe1C09f37f38b12dC509F676964e392F8Fc","decimals":null,"issuer":"Ondo","last_checked":"2026-10-18T09:47:35Z","name":"Amazon (Ondo Tokenized)","official_deployments":[{"address":"0xbb8774FB97436d23d74C1b882E8E9A69322cFD31","network":"Ethereum"},{"address":"0x4553cFe1C09f37f38b12dC509F676964e392F8Fc","network":"BNB Chain"},{"address":"14Tqdo8V1FhzKsE3W2pFsZCzYPQxxupXRcqw9jv6ondo","network":"Solana"},{"address":"0xeD68F063264a01fd7f93087DC19CC1E0D614e8De","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":"AMZN"},"registry_hash":"2bf13ff4020924ba1c74d8e732c3dd1609679a3b9a6dc8a796250beb0ae1b589","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x8617Ba6DEEE616694601ADc41Ab7ffE0e610907E","ticker":"AMZN","verdict":{"Verified":{"issuer":"Ondo","ticker":"AMZN"}},"version":1}

Signature

wo2VLbZA/VfeJoqQ/8mhNMndaKU70amnEim+GHvvuPWkI7vyvt2w5cC9iYViVPQKG2/exc8yNFwgvV+nu4ZKDg==

API call

GET /api/attest/d9297f490dc0fa6b0b9cbb8b9fd01518109d37def12ec9eb58e564e7c13dc708

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.