Does META / 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":93152727,"chain":"robinhood","checked_at":"2026-10-20T03:50:09Z","dev":false,"expires_at":"2026-10-21T03:50:09Z","issuer":"Robinhood","pool":{"base":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"25190479446","decimals":6,"symbol":"USDG"},"chain":"robinhood","dex":"ramses-v3","pool":"0x960f79D8DfEC7F2F0C1b24CdAC6BB9Df1371C6e2","quote":{"address":"0xc0D6457C16Cc70d6790Dd43521C899C87ce02f35","balance":"143073817791606114793","decimals":18,"symbol":"META"}},"quote_share_of_supply":0.014224273311208162,"reads":[{"block":93152727,"method":"eth_blockNumber","params":[],"result_hash":"3a7671758ac98df4daa5c459f6c101210d13ad6be4404d6a4bf3519a6d5d9747","slot":null},{"block":null,"method":"eth_call","params":["0x960f79D8DfEC7F2F0C1b24CdAC6BB9Df1371C6e2","token0()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0x960f79D8DfEC7F2F0C1b24CdAC6BB9Df1371C6e2","token1()"],"raw_result":"0xc0d6457c16cc70d6790dd43521c899c87ce02f35","result_hash":"cbac8c97d18dd70dac55b1b8ff9f6d1e3c5d1e390aedcddc4be0e6dbbec7c39f","slot":null},{"block":null,"method":"eth_call","params":["0x960f79D8DfEC7F2F0C1b24CdAC6BB9Df1371C6e2","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0x960f79D8DfEC7F2F0C1b24CdAC6BB9Df1371C6e2","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x960f79D8DfEC7F2F0C1b24CdAC6BB9Df1371C6e2","factory()"],"raw_result":"0xe0c4ceb92d08ca985bb70fe0a22feb121a9854a8","result_hash":"3acd97ac868973fcda20afc787b251dff09968890029c0107e8fa1018dc5cca8","slot":null},{"block":null,"method":"eth_call","params":["0x960f79D8DfEC7F2F0C1b24CdAC6BB9Df1371C6e2","tickSpacing()"],"raw_result":"50","result_hash":"4ec621b227e30e8a72d97865785a0bf20b5032024c589a56e1a6b18a099bdb7c","slot":null},{"block":null,"method":"eth_call","params":["0xE0c4ceb92d08CA985bB70fe0a22fEb121A9854A8","getPool","0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","0xc0D6457C16Cc70d6790Dd43521C899C87ce02f35","50"],"raw_result":"0x960f79d8dfec7f2f0c1b24cdac6bb9df1371c6e2","result_hash":"da8cd2aa3cf750bef48980d9f15c1584d8aa186fcb5146a8a517b16ea706b5ba","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","0x960f79D8DfEC7F2F0C1b24CdAC6BB9Df1371C6e2"],"raw_result":"Some(\"25190479446\")","result_hash":"b96e0dbf534295d9040a724c477d6c39814202f66fe0f647862ec6d1b1ff008e","slot":null},{"block":null,"method":"eth_call","params":["0xc0D6457C16Cc70d6790Dd43521C899C87ce02f35","symbol()"],"raw_result":"Some(\"META\")","result_hash":"fc7608f9907d08104d58aa61456cd644f10df10c506edfc84e3631231d3d5476","slot":null},{"block":null,"method":"eth_call","params":["0xc0D6457C16Cc70d6790Dd43521C899C87ce02f35","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xc0D6457C16Cc70d6790Dd43521C899C87ce02f35","balanceOf","0x960f79D8DfEC7F2F0C1b24CdAC6BB9Df1371C6e2"],"raw_result":"Some(\"143073817791606114793\")","result_hash":"879f68c698299c4f656d41f163bd24c40fc4f7fb6291d58b0534b06517111206","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(\"699707612868144\")","result_hash":"3a94afe67428f168705bb101dced9d5575ad057fb135b0569bf72715da42d97b","slot":null},{"block":null,"method":"eth_call","params":["0xc0D6457C16Cc70d6790Dd43521C899C87ce02f35","symbol()"],"raw_result":"Some(\"META\")","result_hash":"fc7608f9907d08104d58aa61456cd644f10df10c506edfc84e3631231d3d5476","slot":null},{"block":null,"method":"eth_call","params":["0xc0D6457C16Cc70d6790Dd43521C899C87ce02f35","name()"],"raw_result":"Some(\"Meta Platforms • Robinhood Token\")","result_hash":"d8084b30332397e86f4e136106ef1037c925e8f7d9a8d843f31656dfae318fb2","slot":null},{"block":null,"method":"eth_call","params":["0xc0D6457C16Cc70d6790Dd43521C899C87ce02f35","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xc0D6457C16Cc70d6790Dd43521C899C87ce02f35","totalSupply()"],"raw_result":"Some(\"10058427215320000000000\")","result_hash":"45388538523a5033165bb9721d49e714e19e5c1e1302318a87fcb9728435b508","slot":null},{"block":null,"method":"eth_call","params":["0xc0D6457C16Cc70d6790Dd43521C899C87ce02f35","uiMultiplier()"],"raw_result":"1000541459879451635","result_hash":"6c961aa092b4284ba8c35478f22f9c224e548e30b144b2a929d2fb417d9e20ed","slot":null},{"block":null,"method":"eth_getCode","params":["0xc0D6457C16Cc70d6790Dd43521C899C87ce02f35","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0xc0D6457C16Cc70d6790Dd43521C899C87ce02f35","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"robinhood","contract":"0xc0D6457C16Cc70d6790Dd43521C899C87ce02f35","decimals":18,"issuer":"Robinhood","last_checked":"2026-10-20T03:40:19Z","name":"Meta Platforms","official_deployments":[{"address":"0xc0D6457C16Cc70d6790Dd43521C899C87ce02f35","network":"Robinhood Chain"}],"source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"META"},"registry_hash":"f3939bae933ba4104be438e67c414e84d9eb518cec0448785678b642b9519284","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x960f79D8DfEC7F2F0C1b24CdAC6BB9Df1371C6e2","ticker":"META","verdict":{"Verified":{"issuer":"Robinhood","ticker":"META"}},"version":1}

Signature

DWhhENaxJTqd6pcIsDaLmRuV8m+ivdvOqI+SJY3h9fsaQtZlfalSEMQrBv+8ztR2+cgRmuEnxM/voaab0ctQBg==

API call

GET /api/attest/f833fbdd086d679e689ec4aa6bf4bbcf9231eafcc21f4d5df5baa1c048bfa0f0

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.