Does F / USDG 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":92065426,"chain":"robinhood","checked_at":"2026-10-18T20:49:36Z","dev":false,"expires_at":"2026-10-19T20:49:36Z","issuer":"Robinhood","pool":{"base":{"address":"0x25C288E6D899b9BC30160965aD9644c67e73bE0C","balance":"4063561107909918883987","decimals":18,"symbol":"F"},"chain":"robinhood","dex":"uniswap-v3","pool":"0x4dbAC19E895322ac5b93abad9008691632bFFC05","quote":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"28156774331","decimals":6,"symbol":"USDG"}},"quote_share_of_supply":0.35737808338063903,"reads":[{"block":92065426,"method":"eth_blockNumber","params":[],"result_hash":"c60a63f66d76abccfdb6b02e10347fe645e1eb018ba8d6ab0bd76725dcd048e0","slot":null},{"block":null,"method":"eth_call","params":["0x4dbAC19E895322ac5b93abad9008691632bFFC05","token0()"],"raw_result":"0x25c288e6d899b9bc30160965ad9644c67e73be0c","result_hash":"80946e2654e63228ef68c9bc9522a8af08f46ec3e8f1f66fd9cce79bbf44b66f","slot":null},{"block":null,"method":"eth_call","params":["0x4dbAC19E895322ac5b93abad9008691632bFFC05","token1()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0x4dbAC19E895322ac5b93abad9008691632bFFC05","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0x4dbAC19E895322ac5b93abad9008691632bFFC05","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x4dbAC19E895322ac5b93abad9008691632bFFC05","factory()"],"raw_result":"0x1f7d7550b1b028f7571e69a784071f0205fd2efa","result_hash":"bf7614e6e838b22e4363dfcb3022451641875235ca13e64f8d2d8c3334ff85f3","slot":null},{"block":null,"method":"eth_call","params":["0x4dbAC19E895322ac5b93abad9008691632bFFC05","fee()"],"raw_result":"3000","result_hash":"53232d7da9fd2a1931dcd44af08ec415dd52ab8ecc4037ef5e68eb3753978a2e","slot":null},{"block":null,"method":"eth_call","params":["0x1f7d7550B1b028f7571E69A784071F0205FD2EfA","getPool","0x25C288E6D899b9BC30160965aD9644c67e73bE0C","0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","0xbb8"],"raw_result":"0x4dbac19e895322ac5b93abad9008691632bffc05","result_hash":"1589505295e888e2a0f67de7a4e9bd052d1f651217f50419bd4199872b7b504a","slot":null},{"block":null,"method":"eth_call","params":["0x25C288E6D899b9BC30160965aD9644c67e73bE0C","symbol()"],"raw_result":"Some(\"F\")","result_hash":"884c1cda412c398d9028f2815c36ea0ba9cabac92d3417fe25b57631a2a6b6df","slot":null},{"block":null,"method":"eth_call","params":["0x25C288E6D899b9BC30160965aD9644c67e73bE0C","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x25C288E6D899b9BC30160965aD9644c67e73bE0C","balanceOf","0x4dbAC19E895322ac5b93abad9008691632bFFC05"],"raw_result":"Some(\"4063561107909918883987\")","result_hash":"8ad3cbbf8ac7a7322d534a0371d9fe3a45aa396d36eeb3e75c3443a450555c96","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","symbol()"],"raw_result":"Some(\"USDG\")","result_hash":"5cbfd9547b12ffd28d96e5f55c97290c4f230a8d7ad7bbe91dc15f2e61c1a3c5","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","decimals()"],"raw_result":"Some(6)","result_hash":"c68fe6989b1835302197d0af5be845dfab10ed9f9632205eb4ab5b949b9e1a6a","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balanceOf","0x4dbAC19E895322ac5b93abad9008691632bFFC05"],"raw_result":"Some(\"28156774331\")","result_hash":"e89c1f58bce363049580dff1fe58cffa289fdf8784a11dea8d2cf4e96d381db2","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","symbol()"],"raw_result":"Some(\"USDG\")","result_hash":"5cbfd9547b12ffd28d96e5f55c97290c4f230a8d7ad7bbe91dc15f2e61c1a3c5","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","name()"],"raw_result":"Some(\"Global Dollar\")","result_hash":"e34c795a5a7df6a2269bde7247321204357731d7742ef5974b04eb6899db8b11","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","decimals()"],"raw_result":"Some(6)","result_hash":"c68fe6989b1835302197d0af5be845dfab10ed9f9632205eb4ab5b949b9e1a6a","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","totalSupply()"],"raw_result":"Some(\"695806034790491\")","result_hash":"21a27cf72b5dd60088135211f2c56057779d2f5e723b98f1c89b7732b57a27e1","slot":null},{"block":null,"method":"eth_call","params":["0x25C288E6D899b9BC30160965aD9644c67e73bE0C","symbol()"],"raw_result":"Some(\"F\")","result_hash":"884c1cda412c398d9028f2815c36ea0ba9cabac92d3417fe25b57631a2a6b6df","slot":null},{"block":null,"method":"eth_call","params":["0x25C288E6D899b9BC30160965aD9644c67e73bE0C","name()"],"raw_result":"Some(\"Ford Motor • Robinhood Token\")","result_hash":"c2719cb502f1d51d8d88c0ab91e2b66b4c2b36257fa2aa6a7e72f0bd55a98092","slot":null},{"block":null,"method":"eth_call","params":["0x25C288E6D899b9BC30160965aD9644c67e73bE0C","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x25C288E6D899b9BC30160965aD9644c67e73bE0C","totalSupply()"],"raw_result":"Some(\"11370482122100000000000\")","result_hash":"a2f33935f6371f2844db2d333e1b0e9b998dd556d8d373834f9b711f97bf6c38","slot":null},{"block":null,"method":"eth_call","params":["0x25C288E6D899b9BC30160965aD9644c67e73bE0C","uiMultiplier()"],"raw_result":"1000145502866134027","result_hash":"045806792d0656164ee6a427ea9991d16b2bb6514493c605b6e1779c1e4844a4","slot":null},{"block":null,"method":"eth_getCode","params":["0x25C288E6D899b9BC30160965aD9644c67e73bE0C","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0x25C288E6D899b9BC30160965aD9644c67e73bE0C","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"robinhood","contract":"0x25C288E6D899b9BC30160965aD9644c67e73bE0C","decimals":18,"issuer":"Robinhood","last_checked":"2026-10-18T20:40:19Z","name":"Ford Motor","official_deployments":[{"address":"0x25C288E6D899b9BC30160965aD9644c67e73bE0C","network":"Robinhood Chain"}],"source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"F"},"registry_hash":"232d0be2eda56472709e0cf69b424df4c8dd39a27138a34cf3d57c8f428c0f9e","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x4dbAC19E895322ac5b93abad9008691632bFFC05","ticker":"F","verdict":{"Verified":{"issuer":"Robinhood","ticker":"F"}},"version":1}

Signature

MR0gQJgE0jIQXLBNSqx9ndv5OyyC4gGoyfN7+LXehpb08F7FSuef2eqzen8Ii3qhIT14huKlX6oY7jzvvsv2Aw==

API call

GET /api/attest/7a366bf47c1a36cbf675fdd90ae7f2036f35e9d47e2761ab34ee0562a75ff64b

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.