TTWO/USDG

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":76081127,"chain":"RobinhoodChain","checked_at":"2026-09-30T00:18:58Z","dev":false,"expires_at":"2026-10-01T00:18:58Z","issuer":"Robinhood","pool":{"base":{"address":"0x5e81213613b6B86EaB4c6c50d718d34359459786","balance":"749276950112573883089","decimals":18,"symbol":"TTWO"},"chain":"RobinhoodChain","dex":"uniswap-v3","pool":"0xD9Ab4b7fAe6DC2f7020134Ec744A8F53Ef3E5E24","quote":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"33009928856","decimals":6,"symbol":"USDG"}},"quote_share_of_supply":0.1222213022132112,"reads":[{"block":null,"method":"eth_getCode","params":["0xD9Ab4b7fAe6DC2f7020134Ec744A8F53Ef3E5E24","latest"],"result_hash":"fbcfd36fb672373ed588ac88934dee701a6474429413b22a024a328a2fe690ef","slot":null},{"block":76081127,"method":"eth_blockNumber","params":[],"result_hash":"17bee10ff6dc3aba1122b8a484787ee5d5f59c9ebf64ee33023519d31adec8eb","slot":null},{"block":null,"method":"eth_call","params":["0xD9Ab4b7fAe6DC2f7020134Ec744A8F53Ef3E5E24","token0()"],"raw_result":"0x5e81213613b6b86eab4c6c50d718d34359459786","result_hash":"aa19537f1edb113092c1f00e07e4ed62185e6474735b58844fd538bde5665168","slot":null},{"block":null,"method":"eth_call","params":["0xD9Ab4b7fAe6DC2f7020134Ec744A8F53Ef3E5E24","token1()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0xD9Ab4b7fAe6DC2f7020134Ec744A8F53Ef3E5E24","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0xD9Ab4b7fAe6DC2f7020134Ec744A8F53Ef3E5E24","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0xD9Ab4b7fAe6DC2f7020134Ec744A8F53Ef3E5E24","factory()"],"raw_result":"Some(0x1f7d7550b1b028f7571e69a784071f0205fd2efa)","result_hash":"3a5325de1b5dc50662a9e2ec44d8428ded4306d2bd46195f62299474690e30aa","slot":null},{"block":null,"method":"eth_call","params":["0x5e81213613b6B86EaB4c6c50d718d34359459786","symbol()"],"raw_result":"Some(\"TTWO\")","result_hash":"011bbe1843e2cd6e762bc2515b49bdb54d29a101ac8df430ec35f48dbb7236cd","slot":null},{"block":null,"method":"eth_call","params":["0x5e81213613b6B86EaB4c6c50d718d34359459786","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x5e81213613b6B86EaB4c6c50d718d34359459786","balanceOf","0xD9Ab4b7fAe6DC2f7020134Ec744A8F53Ef3E5E24"],"raw_result":"Some(\"749276950112573883089\")","result_hash":"673a66b267687e0411dcf43fd7c22749281d33380d747c9717e459cd4c717bda","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","0xD9Ab4b7fAe6DC2f7020134Ec744A8F53Ef3E5E24"],"raw_result":"Some(\"33009928856\")","result_hash":"2392037ad623cc23a9d4a74d61585c8542f4769a41233b50e2a04ea545aa0461","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(\"683057258909461\")","result_hash":"3142e10dc87a1fc9e6703ce3e2e4371004f1cef266d780011a30464ee2ebb354","slot":null},{"block":null,"method":"eth_call","params":["0x5e81213613b6B86EaB4c6c50d718d34359459786","symbol()"],"raw_result":"Some(\"TTWO\")","result_hash":"011bbe1843e2cd6e762bc2515b49bdb54d29a101ac8df430ec35f48dbb7236cd","slot":null},{"block":null,"method":"eth_call","params":["0x5e81213613b6B86EaB4c6c50d718d34359459786","name()"],"raw_result":"Some(\"Take-Two Interactive Software • Robinhood Token\")","result_hash":"35c5f0cd9fc71dcccda2dc687c8ed8cb04c1d2ff176c89cccc3e931148ddb282","slot":null},{"block":null,"method":"eth_call","params":["0x5e81213613b6B86EaB4c6c50d718d34359459786","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x5e81213613b6B86EaB4c6c50d718d34359459786","totalSupply()"],"raw_result":"Some(\"6130493920000000000000\")","result_hash":"e5079464392ed94c4ceb64f715f51e2c071c798519c3d91718561d3676b987a7","slot":null},{"block":null,"method":"eth_call","params":["0x5e81213613b6B86EaB4c6c50d718d34359459786","uiMultiplier()"],"raw_result":"1000000000000000000","result_hash":"46754a2491051f216577f1b9f19516f9be1a28c62f023dcbabd8c5317cdefe4b","slot":null},{"block":null,"method":"eth_getCode","params":["0x5e81213613b6B86EaB4c6c50d718d34359459786","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0x5e81213613b6B86EaB4c6c50d718d34359459786","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"RobinhoodChain","contract":"0x5e81213613b6B86EaB4c6c50d718d34359459786","decimals":18,"issuer":"Robinhood","last_checked":"2026-09-29T23:37:24Z","name":"Take-Two Interactive Software","source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"TTWO"},"registry_hash":"b3f72fc9046ef9a37e433405d5916bce13581b85d8cce5889f24cf56e53b77b4","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xD9Ab4b7fAe6DC2f7020134Ec744A8F53Ef3E5E24","ticker":"TTWO","verdict":{"Verified":{"issuer":"Robinhood","ticker":"TTWO"}},"version":1}

Signature

vf7xeCxto8DQ2WrPAbhIKg+JwHExtr+Oaz3D1JWjAtb3uLmnWK4FeFDCWTxoGNnmC4bXFSRehyTLLuRTtG0oBA==

API call

GET /api/attest/c54d0c07d172de8bfcc73d62239a472cafeb98571152971a8f0b9879ecbd1c21

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.