NVDAx/Unknown

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":"2026-09-30T00:11:52Z","dev":false,"expires_at":"2026-10-01T00:11:52Z","issuer":"Backed xStocks","pool":{"base":{"address":"Xsc9qvGR1efVDFGLrVsmkzv3qi45LTBjeUKSPmx9qEh","balance":"461957192297","decimals":8,"symbol":"NVDAx"},"chain":"Solana","dex":"raydium-clmm","pool":"49iMatQtoyabsYAQc8GafVq6aeBFVDxSRH44oiatyyw6","quote":{"address":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","balance":"2355586038253","decimals":6,"symbol":null}},"quote_share_of_supply":0.014379053180917575,"reads":[{"block":null,"method":"getSlot","params":[{"commitment":"confirmed"}],"result_hash":"63dee349e1d97cc3d91416050d5b945183c7047a3d4d462df8f013d10f1b088c","slot":451799145},{"block":null,"method":"getAccountInfo","params":["49iMatQtoyabsYAQc8GafVq6aeBFVDxSRH44oiatyyw6",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":451799147},"value":{"data":["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","base64"],"executable":false,"lamports":11647124,"owner":"CAMMCzo5YL8w4VFF8KVHrK22GGUsp5VTaW7grrKgrWqK","rentEpoch":18446744073709551615,"space":1544}},"result_hash":"3fd9d695a4c10025fba54a6caed017f0369a6dcbceece44aafda90ee64e9b5f6","slot":null},{"block":null,"method":"getTokenAccountBalance","params":["4JEtq7NraU9U5URcCKSv6sWRRgDSuSnUjYDqpSJSWohY",{"commitment":"confirmed"}],"result_hash":"bff6e6fd67959d07a5367a4a96750a597e0d198772533c1652a6aab411c5ce06","slot":null},{"block":null,"method":"getTokenAccountBalance","params":["DyKsypuzQvhi37K8UvjCMBC43h4HtW4r6jhWoqHyrSSe",{"commitment":"confirmed"}],"result_hash":"f9d87694de644e728179f5e234004de4884cd7e5254aa31449ed8df64a295bee","slot":null},{"block":null,"method":"getMultipleAccounts","params":[["Xsc9qvGR1efVDFGLrVsmkzv3qi45LTBjeUKSPmx9qEh","EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"],{"commitment":"confirmed","encoding":"base64"}],"result_hash":"b6ee2daa92be606a2549a936fc9fccbfc072914bd55d2c1f95c779d82d1dadd9","slot":null},{"block":null,"method":"getTokenSupply","params":["EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",{"commitment":"confirmed"}],"result_hash":"52bb738f1793c2fa8121da57cb347919cb662066a697413058cd5a9214d5469e","slot":null},{"block":null,"method":"getAccountInfo","params":["EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":451799151},"value":{"data":["AQAAAJj+huiNm+Lqi8HMpIeLKYjCQPUrhCS/tA7Rot3LXhmbVhzJzpQpHAAGAQEAAABicKqKWcWUBbRShshncubNEm6bil06OFNtN/e0FOi2Zw==","base64"],"executable":false,"lamports":534808027998,"owner":"TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA","rentEpoch":18446744073709551615,"space":82}},"result_hash":"1661d425e7252fa24c2e6f25c2576ac79fe3a4048fec215566cf3cfb6be4f6d2","slot":null},{"block":null,"method":"getTokenSupply","params":["Xsc9qvGR1efVDFGLrVsmkzv3qi45LTBjeUKSPmx9qEh",{"commitment":"confirmed"}],"result_hash":"c274951e9964e960d993a428f85bf631cc6b902ba46d231fbfcd90794473956e","slot":null},{"block":null,"method":"getAccountInfo","params":["Xsc9qvGR1efVDFGLrVsmkzv3qi45LTBjeUKSPmx9qEh",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":451799171},"value":{"data":["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","base64"],"executable":false,"lamports":621944468,"owner":"TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb","rentEpoch":18446744073709551615,"space":679}},"result_hash":"f14b0272529659c702f6bd1a636b27975c5f96cb589f17feed6e57cfd5e8256c","slot":null}],"registry_entry":{"chain":"Solana","contract":"Xsc9qvGR1efVDFGLrVsmkzv3qi45LTBjeUKSPmx9qEh","decimals":null,"issuer":"Backed xStocks","last_checked":"2026-09-29T23:37:23Z","name":"NVIDIA","source":"xstocks-api","source_url":"https://api.xstocks.fi/api/v2/public/assets","ticker":"NVDA"},"registry_hash":"b3f72fc9046ef9a37e433405d5916bce13581b85d8cce5889f24cf56e53b77b4","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":451799145,"subject":"49iMatQtoyabsYAQc8GafVq6aeBFVDxSRH44oiatyyw6","ticker":"NVDA","verdict":{"Verified":{"issuer":"Backed xStocks","ticker":"NVDA"}},"version":1}

Signature

yvgG+K6VCO9I8p9XsxrfALmeb+qPganAQuSeoCCDgN3id4tagwEHGvtKdK52cas+dzpnPiKBZ0xDrvopcD8mAg==

API call

GET /api/attest/28f0fd8a9dd189d2d89a2070d928eb4610a803bb7ed4fa4d3aa9ce55ff6a6633

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.