COINx/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":"2026-09-30T00:16:07Z","dev":false,"expires_at":"2026-10-01T00:16:07Z","issuer":"Backed xStocks","pool":{"base":{"address":"Xs7ZdzSHLU9ftNJsii5fCeJhoRWSC32SQGzGQtePxNu","balance":"387284515445","decimals":8,"symbol":"COINx"},"chain":"Solana","dex":"raydium-clmm","pool":"w7SGmPeXoMCsjvXqgsAmUn56uypyDsjAtsxeVkaiqxa","quote":{"address":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","balance":"733661693725","decimals":6,"symbol":null}},"quote_share_of_supply":0.02843962773073065,"reads":[{"block":null,"method":"getSlot","params":[{"commitment":"confirmed"}],"result_hash":"b9e025a105684ebc8ad3568124d59331c64f83961024647cafa79d54b7b50b99","slot":451800097},{"block":null,"method":"getAccountInfo","params":["w7SGmPeXoMCsjvXqgsAmUn56uypyDsjAtsxeVkaiqxa",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":451800098},"value":{"data":["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","base64"],"executable":false,"lamports":11647120,"owner":"CAMMCzo5YL8w4VFF8KVHrK22GGUsp5VTaW7grrKgrWqK","rentEpoch":18446744073709551615,"space":1544}},"result_hash":"749700ed20cca86cb035412f6b1164993513f830968e5c9e63ef64ad1af13320","slot":null},{"block":null,"method":"getTokenAccountBalance","params":["4oXbG42T4NYJz4oBEBnpVoXauSkdrzNTM16CXsepXyhJ",{"commitment":"confirmed"}],"result_hash":"3245b21b4c1facae1470e9fd27b829c540c78e9c99cd0e04ec650471079ecbed","slot":null},{"block":null,"method":"getTokenAccountBalance","params":["8iYt6azJsp6z6zz3scVomSgiJ25MogcFLTLperGnobFB",{"commitment":"confirmed"}],"result_hash":"c9d8c822f9bffa7a49246f2f9585bc28b2cc8dd100b266aac5bd2437f89d695c","slot":null},{"block":null,"method":"getMultipleAccounts","params":[["Xs7ZdzSHLU9ftNJsii5fCeJhoRWSC32SQGzGQtePxNu","EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"],{"commitment":"confirmed","encoding":"base64"}],"result_hash":"0d555b895e81502a0fa61190477f5960154d46a8327416a0f60d77e7500c424b","slot":null},{"block":null,"method":"getTokenSupply","params":["EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",{"commitment":"confirmed"}],"result_hash":"0ad0d8bb7847be50f4fde1f877b40738a318a578c0715686512e6d6b7382f2e0","slot":null},{"block":null,"method":"getAccountInfo","params":["EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":451800104},"value":{"data":["AQAAAJj+huiNm+Lqi8HMpIeLKYjCQPUrhCS/tA7Rot3LXhmb6VzxeZQpHAAGAQEAAABicKqKWcWUBbRShshncubNEm6bil06OFNtN/e0FOi2Zw==","base64"],"executable":false,"lamports":534808027998,"owner":"TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA","rentEpoch":18446744073709551615,"space":82}},"result_hash":"99738c3283322e8caeb126bc7204009b036788aaf08fe9bf4120eafd20e8fd1d","slot":null},{"block":null,"method":"getTokenSupply","params":["Xs7ZdzSHLU9ftNJsii5fCeJhoRWSC32SQGzGQtePxNu",{"commitment":"confirmed"}],"result_hash":"ad0cc7673a50dcc46490c74ac838436d2fa8882c95e66e6bbf62f9650fd8d8b8","slot":null},{"block":null,"method":"getAccountInfo","params":["Xs7ZdzSHLU9ftNJsii5fCeJhoRWSC32SQGzGQtePxNu",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":451800123},"value":{"data":["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","base64"],"executable":false,"lamports":15630640,"owner":"TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb","rentEpoch":18446744073709551615,"space":681}},"result_hash":"6ddbfa81ebbf05a4dffefeab25f927ed1f9d5ad739d1c220894a90c155ea27f3","slot":null}],"registry_entry":{"chain":"Solana","contract":"Xs7ZdzSHLU9ftNJsii5fCeJhoRWSC32SQGzGQtePxNu","decimals":null,"issuer":"Backed xStocks","last_checked":"2026-09-29T23:37:23Z","name":"Coinbase","source":"xstocks-api","source_url":"https://api.xstocks.fi/api/v2/public/assets","ticker":"COIN"},"registry_hash":"b3f72fc9046ef9a37e433405d5916bce13581b85d8cce5889f24cf56e53b77b4","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":451800097,"subject":"w7SGmPeXoMCsjvXqgsAmUn56uypyDsjAtsxeVkaiqxa","ticker":"COIN","verdict":{"Verified":{"issuer":"Backed xStocks","ticker":"COIN"}},"version":1}

Signature

8clay5BB06/Vc99XsBA0o9Jnp8wE4ZzamNIxecAY55IbNXkeWPlomR7xCBHrg9qRLW0cVkKDKN/z8QESUSWuCg==

API call

GET /api/attest/1e1ab955410c177d59ca2084f012ebb0682b63af3c3450cea15bc140e6596cdf

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.