Does VTI / 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":91678777,"chain":"robinhood","checked_at":"2026-10-18T09:53:38Z","dev":false,"expires_at":"2026-10-19T09:53:38Z","issuer":"Robinhood","pool":{"base":{"address":"0x0594134DF3f171a354D9C85eBD65b7A6148F6D09","balance":"81658737766597767295","decimals":18,"symbol":"VTI"},"chain":"robinhood","dex":"uniswap-v3","pool":"0xb78DD1A97fa544c65d7D1f12453EcaAF1e05c36d","quote":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"13836833255","decimals":6,"symbol":"USDG"}},"quote_share_of_supply":0.4808605554927324,"reads":[{"block":91678777,"method":"eth_blockNumber","params":[],"result_hash":"f595b08fb9372765fcf9888a3a217f93e11028b5a24ece51b89b2d29a8b91b22","slot":null},{"block":null,"method":"eth_call","params":["0xb78DD1A97fa544c65d7D1f12453EcaAF1e05c36d","token0()"],"raw_result":"0x0594134df3f171a354d9c85ebd65b7a6148f6d09","result_hash":"f98e9c4b8ee7bcf69dde0c43ceac64218aaf59f7fddf80543daac1d7ad9c8501","slot":null},{"block":null,"method":"eth_call","params":["0xb78DD1A97fa544c65d7D1f12453EcaAF1e05c36d","token1()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0xb78DD1A97fa544c65d7D1f12453EcaAF1e05c36d","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0xb78DD1A97fa544c65d7D1f12453EcaAF1e05c36d","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0xb78DD1A97fa544c65d7D1f12453EcaAF1e05c36d","factory()"],"raw_result":"0x1f7d7550b1b028f7571e69a784071f0205fd2efa","result_hash":"bf7614e6e838b22e4363dfcb3022451641875235ca13e64f8d2d8c3334ff85f3","slot":null},{"block":null,"method":"eth_call","params":["0xb78DD1A97fa544c65d7D1f12453EcaAF1e05c36d","fee()"],"raw_result":"10000","result_hash":"328d48ab2376d2f42d3af5ba69086143c8f5fe883ed195a8280b2154a5711a33","slot":null},{"block":null,"method":"eth_call","params":["0x1f7d7550B1b028f7571E69A784071F0205FD2EfA","getPool","0x0594134DF3f171a354D9C85eBD65b7A6148F6D09","0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","0x2710"],"raw_result":"0xb78dd1a97fa544c65d7d1f12453ecaaf1e05c36d","result_hash":"0287edb090889e10e2364b17753fd7eb1b1985052455d6d1d320ae97d57b1b16","slot":null},{"block":null,"method":"eth_call","params":["0x0594134DF3f171a354D9C85eBD65b7A6148F6D09","symbol()"],"raw_result":"Some(\"VTI\")","result_hash":"17cd0aa29b882204d1c782f8e1c7e5eefc3b45feea363864bf4f57f2defdbf0c","slot":null},{"block":null,"method":"eth_call","params":["0x0594134DF3f171a354D9C85eBD65b7A6148F6D09","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x0594134DF3f171a354D9C85eBD65b7A6148F6D09","balanceOf","0xb78DD1A97fa544c65d7D1f12453EcaAF1e05c36d"],"raw_result":"Some(\"81658737766597767295\")","result_hash":"b28086ad392c5498f6bf39a3054cfd404216c2cbc3deb7f40dceddde63a3dad7","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","0xb78DD1A97fa544c65d7D1f12453EcaAF1e05c36d"],"raw_result":"Some(\"13836833255\")","result_hash":"1353ceda04d7f4154e01cc5f2261f65060d5306c4476e14d0fe3b8b604124a60","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":["0x0594134DF3f171a354D9C85eBD65b7A6148F6D09","symbol()"],"raw_result":"Some(\"VTI\")","result_hash":"17cd0aa29b882204d1c782f8e1c7e5eefc3b45feea363864bf4f57f2defdbf0c","slot":null},{"block":null,"method":"eth_call","params":["0x0594134DF3f171a354D9C85eBD65b7A6148F6D09","name()"],"raw_result":"Some(\"Vanguard Morningstar Total Stock Market ETF • Robinhood Token\")","result_hash":"f1863e134bdb787ff2496f6a38829d9df1862989e63a112c3417a4427b6b1345","slot":null},{"block":null,"method":"eth_call","params":["0x0594134DF3f171a354D9C85eBD65b7A6148F6D09","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x0594134DF3f171a354D9C85eBD65b7A6148F6D09","totalSupply()"],"raw_result":"Some(\"169817916720000000000\")","result_hash":"6b02b18021124e1c320121e713485bd00c6629be344ff69d98ddf9d90d521d0f","slot":null},{"block":null,"method":"eth_call","params":["0x0594134DF3f171a354D9C85eBD65b7A6148F6D09","uiMultiplier()"],"raw_result":"1001751012345030813","result_hash":"276860ff1f1174c3d69911d2af1262143661323468e27c18810d5d1181ac6def","slot":null},{"block":null,"method":"eth_getCode","params":["0x0594134DF3f171a354D9C85eBD65b7A6148F6D09","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0x0594134DF3f171a354D9C85eBD65b7A6148F6D09","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"robinhood","contract":"0x0594134DF3f171a354D9C85eBD65b7A6148F6D09","decimals":18,"issuer":"Robinhood","last_checked":"2026-10-18T09:47:33Z","name":"Vanguard Morningstar Total Stock Market ETF","official_deployments":[{"address":"0x0594134DF3f171a354D9C85eBD65b7A6148F6D09","network":"Robinhood Chain"}],"source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"VTI"},"registry_hash":"3143486c8ed17e52c07540b096bdf4ef50abfca368b23311d9290e9923561570","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xb78DD1A97fa544c65d7D1f12453EcaAF1e05c36d","ticker":"VTI","verdict":{"Verified":{"issuer":"Robinhood","ticker":"VTI"}},"version":1}

Signature

3QNAK8Ls9Y46k93jdO08WM0JDRhRvumO2RcMthE2FA91619KlW5VwDUJDyCQIUGwyhR7VoZD4v7fZBlCAQA9BQ==

API call

GET /api/attest/817f082b00ddefbf1a9138c192dd3caef87436103f4de0d568c0aec6f0bfdaaa

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.