DATACENTER/NVDAx

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":null,"chain":"Solana","checked_at":"2026-10-07T03:42:29Z","dev":false,"expires_at":"2026-10-08T03:42:29Z","issuer":"Backed xStocks","pool":{"base":{"address":"G7eYmAVcHHsr5zn2y2gMvW8xSUT8xyJyiu6gH7dGpump","balance":"1000000000000000","decimals":6,"symbol":"DATACENTER"},"chain":"Solana","dex":"pumpfun","pool":"5DnhFALRYpbTjLViVSEaqGsUoHw5DY8XLyyF3qaMkgqT","quote":{"address":"Xsc9qvGR1efVDFGLrVsmkzv3qi45LTBjeUKSPmx9qEh","balance":"29","decimals":8,"symbol":"NVDAx"}},"quote_share_of_supply":9.026811387782993e-13,"reads":[{"block":null,"method":"getSlot","params":[{"commitment":"confirmed"}],"result_hash":"99dc918e745a27c06ab80b9a87b601c944430729ebd219de027cd52fd8980a47","slot":454105147},{"block":null,"method":"getAccountInfo","params":["5DnhFALRYpbTjLViVSEaqGsUoHw5DY8XLyyF3qaMkgqT",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":454105149},"value":{"data":["F7f4N2DYrGAAENhH488DALU/OnEAAAAAAHjF+1HRAgAdAAAAAAAAAACAxqR+jQMAAFFE7+C/GuzcZzH+f27vrW/ExddJjM2Qag35dvXXKxb1AAAH6KUOFA/aV5H0VmqVf9OuP4c+ajRm/8E9eRGd+pq1CkMAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==","base64"],"executable":false,"lamports":1417320,"owner":"6EF8rrecthR5Dkzon8Nwu78hRvfCKubJ14M5uBEwF6P","rentEpoch":18446744073709551615,"space":151}},"result_hash":"0811853abd438859e0769c8b6a50df0ef9dc30ea1a1027f6c910bfee4f52062f","slot":454105149},{"block":null,"method":"getTokenAccountsByOwner","params":["5DnhFALRYpbTjLViVSEaqGsUoHw5DY8XLyyF3qaMkgqT",{"programId":"TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA"},{"commitment":"confirmed","encoding":"base64"}],"result_hash":"a7827f738bb044e68242bff92d5e6440b8dec6f7fd3619ed099d0d35e9393516","slot":454105151},{"block":null,"method":"getTokenAccountsByOwner","params":["5DnhFALRYpbTjLViVSEaqGsUoHw5DY8XLyyF3qaMkgqT",{"programId":"TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb"},{"commitment":"confirmed","encoding":"base64","minContextSlot":454105151}],"result_hash":"6a13f6d5fc5fc286f00c5f67820358f017cce1728476dc457ddd4659958a52b7","slot":454105153},{"block":null,"method":"getTokenAccountBalance","params":["8Kzm6vxRkvovp37QP3E45TqoGApAREionNJxZXsJpiQ5",{"commitment":"confirmed"}],"result_hash":"61c4e3402d1f2e104e20650ce1f2633267a6f3b00fe20780f83019a684879e4c","slot":454105153},{"block":null,"method":"getTokenAccountBalance","params":["ANisBHYTcBVszUtk3Vmi5b3es9P8MQxVSWoa4T5Jzx7d",{"commitment":"confirmed"}],"result_hash":"221d11e9223bfb5f7cfcb3995960e79f670ee7a2749ed4f0fd27ea5173012310","slot":454105154},{"block":null,"method":"getMultipleAccounts","params":[["G7eYmAVcHHsr5zn2y2gMvW8xSUT8xyJyiu6gH7dGpump","Xsc9qvGR1efVDFGLrVsmkzv3qi45LTBjeUKSPmx9qEh"],{"commitment":"confirmed","encoding":"base64"}],"result_hash":"48f2032686cd9e3afd9dde1ceb5d2af31b859835512e0f9a314375051b1a45f9","slot":454105155},{"block":null,"method":"getTokenSupply","params":["G7eYmAVcHHsr5zn2y2gMvW8xSUT8xyJyiu6gH7dGpump",{"commitment":"confirmed"}],"result_hash":"1c537e87299e81ce23c00f453e15b881a63370f90811f9efc72cb885678b8137","slot":454105157},{"block":null,"method":"getAccountInfo","params":["G7eYmAVcHHsr5zn2y2gMvW8xSUT8xyJyiu6gH7dGpump",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":454105158},"value":{"data":["AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAIDGpH6NAwAGAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAARIAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAOCTPnS/g7aMIYzTwg5jFDVvTXGejq7rQqyoI4ukYR+/EwCIAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA4JM+dL+DtowhjNPCDmMUNW9NcZ6OrutCrKgji6RhH78KAAAARGF0YWNlbnRlcgoAAABEQVRBQ0VOVEVSJAAAAGh0dHBzOi8vbS5yYXBpZGxhdW5jaC5pby9tL0drY1ZJdjh3NgAAAAA=","base64"],"executable":false,"lamports":2550160,"owner":"TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb","rentEpoch":18446744073709551615,"space":374}},"result_hash":"8fd1d9f17633ceff7b7467158f77f7dfb8439c3413f8c96091da52620aef928f","slot":454105158},{"block":null,"method":"getTokenSupply","params":["Xsc9qvGR1efVDFGLrVsmkzv3qi45LTBjeUKSPmx9qEh",{"commitment":"confirmed"}],"result_hash":"d9ef7e1b7d4ac039110f9746c0816edef6471ca30dc3a962f3e2d56222e02f8b","slot":454105177},{"block":null,"method":"getAccountInfo","params":["Xsc9qvGR1efVDFGLrVsmkzv3qi45LTBjeUKSPmx9qEh",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":454105178},"value":{"data":["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","base64"],"executable":false,"lamports":621944468,"owner":"TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb","rentEpoch":18446744073709551615,"space":679}},"result_hash":"e0ce046a38325d892ab04c78c603eaa282ac59d83006eb483e0dcc0cecc0b9aa","slot":454105178}],"registry_entry":{"chain":"Solana","contract":"Xsc9qvGR1efVDFGLrVsmkzv3qi45LTBjeUKSPmx9qEh","decimals":null,"issuer":"Backed xStocks","last_checked":"2026-10-07T02:55:09Z","name":"NVIDIA","source":"xstocks-api","source_url":"https://api.xstocks.fi/api/v2/public/assets","ticker":"NVDA"},"registry_hash":"2a287992f009194b80dd0c1075a122e381a36fb0253aa3fb9d3240665e016b54","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":454105147,"subject":"5DnhFALRYpbTjLViVSEaqGsUoHw5DY8XLyyF3qaMkgqT","ticker":"NVDA","verdict":{"Verified":{"issuer":"Backed xStocks","ticker":"NVDA"}},"version":1}

Signature

VfdSZwWMMoLqkDTR/U7YWL14OcH78LwuMN+oEsgv6aAu+VeqHi+Frd3X8IcoPqog+73ImK4KhkWzOGAnp0YhAA==

API call

GET /api/attest/baff33d7b5d42942f5d007668447bf7e50b14ce26e57f42a856347803dc08737

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.