Does GOOGL / 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":91676693,"chain":"robinhood","checked_at":"2026-10-18T09:50:03Z","dev":false,"expires_at":"2026-10-19T09:50:03Z","issuer":"Robinhood","pool":{"base":{"address":"0x2e0847E8910a9732eB3fb1bb4b70a580ADAD4FE3","balance":"1748742722573060957263","decimals":18,"symbol":"GOOGL"},"chain":"robinhood","dex":"uniswap-v3","pool":"0x34D0dC122CF9A8Eb296fC5e0D3A233625D7d19b7","quote":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"213599889943","decimals":6,"symbol":"USDG"}},"quote_share_of_supply":0.0998029014303642,"reads":[{"block":91676693,"method":"eth_blockNumber","params":[],"result_hash":"a0fed8f0cd350ddb6347a8d8c35e75afb86ec3228825dbd7c475a41797c659ac","slot":null},{"block":null,"method":"eth_call","params":["0x34D0dC122CF9A8Eb296fC5e0D3A233625D7d19b7","token0()"],"raw_result":"0x2e0847e8910a9732eb3fb1bb4b70a580adad4fe3","result_hash":"6730254f3e1e325428b4637c38ccbcdddb3541a1abcbfe80eef71cf008b45022","slot":null},{"block":null,"method":"eth_call","params":["0x34D0dC122CF9A8Eb296fC5e0D3A233625D7d19b7","token1()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0x34D0dC122CF9A8Eb296fC5e0D3A233625D7d19b7","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0x34D0dC122CF9A8Eb296fC5e0D3A233625D7d19b7","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x34D0dC122CF9A8Eb296fC5e0D3A233625D7d19b7","factory()"],"raw_result":"0x1f7d7550b1b028f7571e69a784071f0205fd2efa","result_hash":"bf7614e6e838b22e4363dfcb3022451641875235ca13e64f8d2d8c3334ff85f3","slot":null},{"block":null,"method":"eth_call","params":["0x34D0dC122CF9A8Eb296fC5e0D3A233625D7d19b7","fee()"],"raw_result":"500","result_hash":"5ac95f46dcda9e6a85f4d281cd691aea7b00846d8f8612d198d396136e9c5140","slot":null},{"block":null,"method":"eth_call","params":["0x1f7d7550B1b028f7571E69A784071F0205FD2EfA","getPool","0x2e0847E8910a9732eB3fb1bb4b70a580ADAD4FE3","0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","0x1f4"],"raw_result":"0x34d0dc122cf9a8eb296fc5e0d3a233625d7d19b7","result_hash":"e5eb697eedabe6bb06939619012575ab9711e8ee741f38944545e4dc73b1a268","slot":null},{"block":null,"method":"eth_call","params":["0x2e0847E8910a9732eB3fb1bb4b70a580ADAD4FE3","symbol()"],"raw_result":"Some(\"GOOGL\")","result_hash":"a2b75dd5b4415a9dfebb356f71f032dc5cf92185661297a13820f4bc2960bec1","slot":null},{"block":null,"method":"eth_call","params":["0x2e0847E8910a9732eB3fb1bb4b70a580ADAD4FE3","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x2e0847E8910a9732eB3fb1bb4b70a580ADAD4FE3","balanceOf","0x34D0dC122CF9A8Eb296fC5e0D3A233625D7d19b7"],"raw_result":"Some(\"1748742722573060957263\")","result_hash":"11cedc4e1a14f5be6e3f00e0fc585b3313ff5e91078ac34b91657cea0de4d97e","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","0x34D0dC122CF9A8Eb296fC5e0D3A233625D7d19b7"],"raw_result":"Some(\"213599889943\")","result_hash":"e3ce7b712acf94923c9e3dd985712d90253af9d2fcf8504975ad07e6c7c96a1a","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(\"696510571472896\")","result_hash":"3bf47cc44e79235c2a4786a9e16c733cbbc4aa81b60a1a84187551f9e56b0257","slot":null},{"block":null,"method":"eth_call","params":["0x2e0847E8910a9732eB3fb1bb4b70a580ADAD4FE3","symbol()"],"raw_result":"Some(\"GOOGL\")","result_hash":"a2b75dd5b4415a9dfebb356f71f032dc5cf92185661297a13820f4bc2960bec1","slot":null},{"block":null,"method":"eth_call","params":["0x2e0847E8910a9732eB3fb1bb4b70a580ADAD4FE3","name()"],"raw_result":"Some(\"Alphabet Class A • Robinhood Token\")","result_hash":"5ac77fdd5d1a82ba2af3bcc8f5a74731c156f801f70079f3634ac7d2744251dc","slot":null},{"block":null,"method":"eth_call","params":["0x2e0847E8910a9732eB3fb1bb4b70a580ADAD4FE3","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x2e0847E8910a9732eB3fb1bb4b70a580ADAD4FE3","totalSupply()"],"raw_result":"Some(\"17521962763710000000000\")","result_hash":"bfcfa347897a7b56df7c458da7e4b1aae64014984e4dc414c1f9045e645aab68","slot":null},{"block":null,"method":"eth_call","params":["0x2e0847E8910a9732eB3fb1bb4b70a580ADAD4FE3","uiMultiplier()"],"raw_result":"1000193924414112587","result_hash":"2c4b00ace73144a254e8c418fb76b89c254f0b8bc34abc45491eff8d4ac690ff","slot":null},{"block":null,"method":"eth_getCode","params":["0x2e0847E8910a9732eB3fb1bb4b70a580ADAD4FE3","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0x2e0847E8910a9732eB3fb1bb4b70a580ADAD4FE3","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"robinhood","contract":"0x2e0847E8910a9732eB3fb1bb4b70a580ADAD4FE3","decimals":18,"issuer":"Robinhood","last_checked":"2026-10-18T09:47:33Z","name":"Alphabet Class A","official_deployments":[{"address":"0x2e0847E8910a9732eB3fb1bb4b70a580ADAD4FE3","network":"Robinhood Chain"}],"source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"GOOGL"},"registry_hash":"3143486c8ed17e52c07540b096bdf4ef50abfca368b23311d9290e9923561570","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x34D0dC122CF9A8Eb296fC5e0D3A233625D7d19b7","ticker":"GOOGL","verdict":{"Verified":{"issuer":"Robinhood","ticker":"GOOGL"}},"version":1}

Signature

svLOjK1OR4Vd1jY8lg/zKA9uA4zURS+pmHU1cYZAeGI1H3OMNDcgY7Akxwf1VbCOxV+W/tx183qy9L3Jmpl0BQ==

API call

GET /api/attest/6418b0d0b759735bbaec9e5288e4a3fc751ad46a7e69e7138f9ae9e5c635804c

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.