Does GOOGLon / USDC 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":26218684,"chain":"ethereum","checked_at":"2026-10-18T09:55:18Z","dev":false,"expires_at":"2026-10-19T09:55:18Z","issuer":"Ondo","pool":{"base":{"address":"0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","balance":"15480045962","decimals":6,"symbol":"USDC"},"chain":"ethereum","dex":"uniswap-v3","pool":"0x39FCB1935f6Ccb0A106D05eB928205C59646af57","quote":{"address":"0xbA47214eDd2bb43099611b208f75E4b42FDcfEDc","balance":"47038370044491720346","decimals":18,"symbol":"GOOGLon"}},"quote_share_of_supply":0.0014198464646842349,"reads":[{"block":26218684,"method":"eth_blockNumber","params":[],"result_hash":"87af768eda2c7536ea5043cd5e5a1a2f2ce7d074a901b40b03c1b6047d88b314","slot":null},{"block":null,"method":"eth_call","params":["0x39FCB1935f6Ccb0A106D05eB928205C59646af57","token0()"],"raw_result":"0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48","result_hash":"6239f262cd1d947b947081c9eba6e8771378942478e1d48654f4f132ebb96021","slot":null},{"block":null,"method":"eth_call","params":["0x39FCB1935f6Ccb0A106D05eB928205C59646af57","token1()"],"raw_result":"0xba47214edd2bb43099611b208f75e4b42fdcfedc","result_hash":"3f0aff5cb0c761185c1e45d536f8974b5f6eeb6fb60467e361d5abb6fe85b877","slot":null},{"block":null,"method":"eth_call","params":["0x39FCB1935f6Ccb0A106D05eB928205C59646af57","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0x39FCB1935f6Ccb0A106D05eB928205C59646af57","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x39FCB1935f6Ccb0A106D05eB928205C59646af57","factory()"],"raw_result":"0x1f98431c8ad98523631ae4a59f267346ea31f984","result_hash":"24b698329e82b3994906dfbd01281d9a6f12f65aa59de65831657e6e928d4c80","slot":null},{"block":null,"method":"eth_call","params":["0x39FCB1935f6Ccb0A106D05eB928205C59646af57","fee()"],"raw_result":"10000","result_hash":"328d48ab2376d2f42d3af5ba69086143c8f5fe883ed195a8280b2154a5711a33","slot":null},{"block":null,"method":"eth_call","params":["0x1F98431c8aD98523631AE4a59f267346ea31F984","getPool","0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","0xbA47214eDd2bb43099611b208f75E4b42FDcfEDc","0x2710"],"raw_result":"0x39fcb1935f6ccb0a106d05eb928205c59646af57","result_hash":"14a173587e5ce279c7271dd5afc6f7cdb2770ae13f437b7699b28c8299ee95d1","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","symbol()"],"raw_result":"Some(\"USDC\")","result_hash":"a3c9e246b0832b52e41efce041d8614251f5e288cdd4b192e85bfd3dfcb748ff","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","decimals()"],"raw_result":"Some(6)","result_hash":"c68fe6989b1835302197d0af5be845dfab10ed9f9632205eb4ab5b949b9e1a6a","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","balanceOf","0x39FCB1935f6Ccb0A106D05eB928205C59646af57"],"raw_result":"Some(\"15480045962\")","result_hash":"d43d9b6bab80c19688f1311d9bee0646f28ae5442637a5f5e466980df47bd9e8","slot":null},{"block":null,"method":"eth_call","params":["0xbA47214eDd2bb43099611b208f75E4b42FDcfEDc","symbol()"],"raw_result":"Some(\"GOOGLon\")","result_hash":"5f0da529cc5c6a9b601a92dbb9ddd08f3c411dfe3510345cfcd1dfea7608ef98","slot":null},{"block":null,"method":"eth_call","params":["0xbA47214eDd2bb43099611b208f75E4b42FDcfEDc","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xbA47214eDd2bb43099611b208f75E4b42FDcfEDc","balanceOf","0x39FCB1935f6Ccb0A106D05eB928205C59646af57"],"raw_result":"Some(\"47038370044491720346\")","result_hash":"f7f427cb2dbb547fb43d662dae4a0cd2342b9d9a91127e9bc415d87fa473d390","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","symbol()"],"raw_result":"Some(\"USDC\")","result_hash":"a3c9e246b0832b52e41efce041d8614251f5e288cdd4b192e85bfd3dfcb748ff","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","name()"],"raw_result":"Some(\"USD Coin\")","result_hash":"fe94af15dc887a2c9df1fb0d6d276e6c586ca9d430ffeac0d05e4baee0637fd1","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","decimals()"],"raw_result":"Some(6)","result_hash":"c68fe6989b1835302197d0af5be845dfab10ed9f9632205eb4ab5b949b9e1a6a","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","totalSupply()"],"raw_result":"Some(\"48209419445932854\")","result_hash":"414ffa53b29c1a4a07cbda2ced932424070953c42fc62fc77d34dfdf71d8f92d","slot":null},{"block":null,"method":"eth_call","params":["0xbA47214eDd2bb43099611b208f75E4b42FDcfEDc","symbol()"],"raw_result":"Some(\"GOOGLon\")","result_hash":"5f0da529cc5c6a9b601a92dbb9ddd08f3c411dfe3510345cfcd1dfea7608ef98","slot":null},{"block":null,"method":"eth_call","params":["0xbA47214eDd2bb43099611b208f75E4b42FDcfEDc","name()"],"raw_result":"Some(\"Alphabet Class A (Ondo Tokenized)\")","result_hash":"fe13bb1d7daa6ed02f005adb2079e56324ed37c2a4d6694e82a1699e811c4b4f","slot":null},{"block":null,"method":"eth_call","params":["0xbA47214eDd2bb43099611b208f75E4b42FDcfEDc","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xbA47214eDd2bb43099611b208f75E4b42FDcfEDc","totalSupply()"],"raw_result":"Some(\"33129194750611831665857\")","result_hash":"11e41a79ca737574255ece3dfdac76706ee87a6ba646c93b471aa83b78b1a21b","slot":null},{"block":null,"method":"eth_getCode","params":["0xbA47214eDd2bb43099611b208f75E4b42FDcfEDc","latest"],"result_hash":"8538a8190a64db88a5e0ec4c95f0129f9eecd6f3a3aacb869262b82d01d123ec","slot":null},{"block":null,"method":"eth_getCode","params":["0xbA47214eDd2bb43099611b208f75E4b42FDcfEDc","latest"],"result_hash":"8538a8190a64db88a5e0ec4c95f0129f9eecd6f3a3aacb869262b82d01d123ec","slot":null}],"registry_entry":{"chain":"ethereum","contract":"0xbA47214eDd2bb43099611b208f75E4b42FDcfEDc","decimals":null,"issuer":"Ondo","last_checked":"2026-10-18T09:47:35Z","name":"Alphabet Class A (Ondo Tokenized)","official_deployments":[{"address":"0xbA47214eDd2bb43099611b208f75E4b42FDcfEDc","network":"Ethereum"},{"address":"0x091FC7778e6932d4009B087B191D1EE3bac5729A","network":"BNB Chain"},{"address":"bbahNA5vT9WJeYft8tALrH1LXWffjwqVoUbqYa1ondo","network":"Solana"},{"address":"0x4D34798f18Eb747F7225663F0553eA2D880cf75D","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":"GOOGL"},"registry_hash":"3143486c8ed17e52c07540b096bdf4ef50abfca368b23311d9290e9923561570","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x39FCB1935f6Ccb0A106D05eB928205C59646af57","ticker":"GOOGL","verdict":{"Verified":{"issuer":"Ondo","ticker":"GOOGL"}},"version":1}

Signature

yID1ViwOF869i7BMSIUImQHZjqbopx+HPRMjMSHIi+zEL+llxxRcceq6aEGK/vA9HbK6uBDzCyTxxVIL8ZJcDA==

API call

GET /api/attest/d7d3325e22d8c7577f8c62f649e30281b04549b12a109d19a98b51e1620a0ec4

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.