Does AVGO / 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":91677303,"chain":"robinhood","checked_at":"2026-10-18T09:51:06Z","dev":false,"expires_at":"2026-10-19T09:51:06Z","issuer":"Robinhood","pool":{"base":{"address":"0x156E175DD063a8cE274C50654eF40e0032b3fbcF","balance":"261849239970813550494","decimals":18,"symbol":"AVGO"},"chain":"robinhood","dex":"uniswap-v3","pool":"0x5B7C404f1d7d77F9f3885aB13d7764F8a173028c","quote":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"80217391468","decimals":6,"symbol":"USDG"}},"quote_share_of_supply":0.3273825905820204,"reads":[{"block":91677303,"method":"eth_blockNumber","params":[],"result_hash":"3dd9aef8ead19768d66a7e9949ce14444b8fc0868eecdd782aae85e0af06d53e","slot":null},{"block":null,"method":"eth_call","params":["0x5B7C404f1d7d77F9f3885aB13d7764F8a173028c","token0()"],"raw_result":"0x156e175dd063a8ce274c50654ef40e0032b3fbcf","result_hash":"f110d2f84a82ac6037ee8bfa2d169527bac45c0cae565d2b9cdce81703df5953","slot":null},{"block":null,"method":"eth_call","params":["0x5B7C404f1d7d77F9f3885aB13d7764F8a173028c","token1()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0x5B7C404f1d7d77F9f3885aB13d7764F8a173028c","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0x5B7C404f1d7d77F9f3885aB13d7764F8a173028c","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x5B7C404f1d7d77F9f3885aB13d7764F8a173028c","factory()"],"raw_result":"0x1f7d7550b1b028f7571e69a784071f0205fd2efa","result_hash":"bf7614e6e838b22e4363dfcb3022451641875235ca13e64f8d2d8c3334ff85f3","slot":null},{"block":null,"method":"eth_call","params":["0x5B7C404f1d7d77F9f3885aB13d7764F8a173028c","fee()"],"raw_result":"3000","result_hash":"53232d7da9fd2a1931dcd44af08ec415dd52ab8ecc4037ef5e68eb3753978a2e","slot":null},{"block":null,"method":"eth_call","params":["0x1f7d7550B1b028f7571E69A784071F0205FD2EfA","getPool","0x156E175DD063a8cE274C50654eF40e0032b3fbcF","0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","0xbb8"],"raw_result":"0x5b7c404f1d7d77f9f3885ab13d7764f8a173028c","result_hash":"152fe480cce620b54864370f2628173a4c8310d5a26d8a1fd8888bfc3ebb3ad3","slot":null},{"block":null,"method":"eth_call","params":["0x156E175DD063a8cE274C50654eF40e0032b3fbcF","symbol()"],"raw_result":"Some(\"AVGO\")","result_hash":"7d3ba2861fdea50afe1e4103770890f89cdfcdd91281ba06ca7679bd3859bfd5","slot":null},{"block":null,"method":"eth_call","params":["0x156E175DD063a8cE274C50654eF40e0032b3fbcF","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x156E175DD063a8cE274C50654eF40e0032b3fbcF","balanceOf","0x5B7C404f1d7d77F9f3885aB13d7764F8a173028c"],"raw_result":"Some(\"261849239970813550494\")","result_hash":"7ee886951cf6b94fd831e2d1adf46f958d25bf040352dc5e81aaea608fda6999","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","0x5B7C404f1d7d77F9f3885aB13d7764F8a173028c"],"raw_result":"Some(\"80217391468\")","result_hash":"3d734199d1410238eb985aef1a3d18214b45581df5fd3f8f2546b4b551dc6b46","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":["0x156E175DD063a8cE274C50654eF40e0032b3fbcF","symbol()"],"raw_result":"Some(\"AVGO\")","result_hash":"7d3ba2861fdea50afe1e4103770890f89cdfcdd91281ba06ca7679bd3859bfd5","slot":null},{"block":null,"method":"eth_call","params":["0x156E175DD063a8cE274C50654eF40e0032b3fbcF","name()"],"raw_result":"Some(\"Broadcom • Robinhood Token\")","result_hash":"cb7d3e55bf061471f64f904e2d023e6a971607f4f2623f24390f7a945ebc0fd4","slot":null},{"block":null,"method":"eth_call","params":["0x156E175DD063a8cE274C50654eF40e0032b3fbcF","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x156E175DD063a8cE274C50654eF40e0032b3fbcF","totalSupply()"],"raw_result":"Some(\"799826403430000000000\")","result_hash":"8194fb07019afc4b3425df7e883f28d17aa11ec7dde84ed4d66435d1cdb1b782","slot":null},{"block":null,"method":"eth_call","params":["0x156E175DD063a8cE274C50654eF40e0032b3fbcF","uiMultiplier()"],"raw_result":"1001257318662278132","result_hash":"101089c7a8463b2ed6c5d75fb45a59d83ea24d1cb98fe20ed5d5081fd310a938","slot":null},{"block":null,"method":"eth_getCode","params":["0x156E175DD063a8cE274C50654eF40e0032b3fbcF","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0x156E175DD063a8cE274C50654eF40e0032b3fbcF","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"robinhood","contract":"0x156E175DD063a8cE274C50654eF40e0032b3fbcF","decimals":18,"issuer":"Robinhood","last_checked":"2026-10-18T09:47:33Z","name":"Broadcom","official_deployments":[{"address":"0x156E175DD063a8cE274C50654eF40e0032b3fbcF","network":"Robinhood Chain"}],"source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"AVGO"},"registry_hash":"3143486c8ed17e52c07540b096bdf4ef50abfca368b23311d9290e9923561570","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x5B7C404f1d7d77F9f3885aB13d7764F8a173028c","ticker":"AVGO","verdict":{"Verified":{"issuer":"Robinhood","ticker":"AVGO"}},"version":1}

Signature

SC7CZfp6h/NfKBfjhPLOLAQNLI0tXLv9lWqiTJxHzgeU4M3HZLQpmmGPGRRq/gXxBLetP4mQOS/XPc70i9TTBA==

API call

GET /api/attest/94abd23369a433523edf98a35024c681959654e4cf1226b79a1e35b749bd08b4

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.