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":92283983,"chain":"robinhood","checked_at":"2026-10-19T03:01:19Z","dev":false,"expires_at":"2026-10-20T03:01:19Z","issuer":"Robinhood","pool":{"base":{"address":"0x0594134DF3f171a354D9C85eBD65b7A6148F6D09","balance":"80951115768148105256","decimals":18,"symbol":"VTI"},"chain":"robinhood","dex":"uniswap-v3","pool":"0xb78DD1A97fa544c65d7D1f12453EcaAF1e05c36d","quote":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"14104761363","decimals":6,"symbol":"USDG"}},"quote_share_of_supply":0.47669361002480265,"reads":[{"block":92283983,"method":"eth_blockNumber","params":[],"result_hash":"7bf56c665f3898951ebdb24233554763c30c4914263ef74a4f9afa823112296f","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(\"80951115768148105256\")","result_hash":"d4f9297c2273767793d77339b085984f3d1295c1f8a9604c6e0cf0b6d0a82b97","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(\"14104761363\")","result_hash":"d73782b207c098fe2ebbfd0ad7e53b1b3113a4a0ebec392cae03bfedbad36185","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(\"696589036119585\")","result_hash":"e37a952cd677b9d24713fa69be66a71eb3e9cf14065e54315d41dc41074c869a","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":"2026-10-19T02:40:19Z","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":"0bd20861acb250fc115ebe98f0dbbb7c686b15c772a071c9020aa5154f2d195f","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xb78DD1A97fa544c65d7D1f12453EcaAF1e05c36d","ticker":"VTI","verdict":{"Verified":{"issuer":"Robinhood","ticker":"VTI"}},"version":1}

Signature

grKvGBqjiALKAn28A/UcSGuk+T8D3JTBRrQU8B0gXJC8REgENoqLNIMPbp+w1NUnpSi3Ln+A2N6UlYUe7l8bCg==

API call

GET /api/attest/de3440cff7ff881db566eee5c9b49170c0433f57a38ee4d32a0ba444782a1dd2

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.