QED
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QED certificate

QED record 8513943aba66 from . View the live pool page.

Verified · Backed xStocks BRK.B

Does BRK.Bx / Unknown match its issuer's published contract?

The pool's quote contract matches Backed xStocks's registry entry for BRK.B.

Verified means the observed quote-token contract matches an issuer-published registry entry on Solana. Only the quote-side contract is checked.

This does not prove backing, custody, reserves, price, safety, solvency, or endorsement.

Signature valid · contract match

Solana raydium-clmm
Subject
BRK.Bx / Unknown · Solana
Pool address
B4UdLnvzCrnfRndLdgGTYZjcKTDsaFKB54cmKb2GoSne
Issuer match
Backed xStocks · BRK.B · View BRK.B contracts
Checked
Valid until
Serial
8513943aba66
Signed by
QED (key id GJWKkiUd)

After this time the certificate remains a historical record, but it no longer establishes current pool or registry state. Re-check to create a fresh observation before relying on current facts.

Compare this address with the one you were given before you trade.

0.05% Checked

Only trust an address you pasted here or opened from this page.

How to verify this yourself

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":"2026-10-18T20:46:40Z","dev":false,"expires_at":"2026-10-19T20:46:40Z","issuer":"Backed xStocks","pool":{"base":{"address":"Xs6B6zawENwAbWVi7w92rjazLuAr5Az59qgWKcNb45x","balance":"1769659205","decimals":8,"symbol":"BRK.Bx"},"chain":"solana","dex":"raydium-clmm","pool":"B4UdLnvzCrnfRndLdgGTYZjcKTDsaFKB54cmKb2GoSne","quote":{"address":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","balance":"94185591496","decimals":6,"symbol":null}},"quote_share_of_supply":0.00054897660087411,"reads":[{"block":null,"method":"getSlot","params":[{"commitment":"confirmed"}],"result_hash":"b8dd4248b86d88b84519935db743a07385521432ac400b8ec1d7a30f85868cf8","slot":458572639},{"block":null,"method":"getAccountInfo","params":["B4UdLnvzCrnfRndLdgGTYZjcKTDsaFKB54cmKb2GoSne",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":458572640},"value":{"data":["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","base64"],"executable":false,"lamports":11644196,"owner":"CAMMCzo5YL8w4VFF8KVHrK22GGUsp5VTaW7grrKgrWqK","rentEpoch":18446744073709551615,"space":1544}},"result_hash":"6c501b4e1720465b323c55871769b373885f5ca151befe27d0b1567b08d8e029","slot":458572640},{"block":null,"method":"getTokenAccountBalance","params":["Gg5qCmVHd8S4oEoBHVAG8zK2ePsAmhkLhYVQqLT9vvpS",{"commitment":"confirmed"}],"result_hash":"64605e479086f7e20417577b976e4ced3ac11e9d9dfbcb9997ccd9092b04c698","slot":458572641},{"block":null,"method":"getTokenAccountBalance","params":["AVNjMHaSNiA7v7FdhDCQwbCynVMSfw6q82p2Ls9beWRZ",{"commitment":"confirmed"}],"result_hash":"b8abd298c19ef735fbe8972d1febd7bf55d8b38daba72ff357b111896686cda8","slot":458572642},{"block":null,"method":"getMultipleAccounts","params":[["Xs6B6zawENwAbWVi7w92rjazLuAr5Az59qgWKcNb45x","EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"],{"commitment":"confirmed","encoding":"base64"}],"result_hash":"982f1baff0672a457f8164a53e111b8c353ac37ad638b069a8359eb0a89d650c","slot":458572643},{"block":null,"method":"getTokenSupply","params":["EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",{"commitment":"confirmed"}],"result_hash":"1dccdf1ba30f8d55011135218cdde22e4fd922c4f1ba48b8f3cb040cbfa6168f","slot":458572644},{"block":null,"method":"getAccountInfo","params":["EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":458572644},"value":{"data":["AQAAAJj+huiNm+Lqi8HMpIeLKYjCQPUrhCS/tA7Rot3LXhmbCS8KUuRWGwAGAQEAAABicKqKWcWUBbRShshncubNEm6bil06OFNtN/e0FOi2Zw==","base64"],"executable":false,"lamports":556436563008,"owner":"TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA","rentEpoch":18446744073709551615,"space":82}},"result_hash":"912ab52e19a69d41c3b009bbf264851911143d71344bf2854e54462706f701fa","slot":458572644},{"block":null,"method":"getProgramAccounts","params":["metaqbxxUerdq28cj1RbAWkYQm3ybzjb6a8bt518x1s",{"commitment":"confirmed","encoding":"base64","filters":[{"memcmp":{"bytes":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","offset":33}}]}],"result_hash":"85ed2b681fcd867f23813dfe31c8a2490c6fd4cdc10d37000244f0ba61f13af0","slot":null},{"block":null,"method":"getTokenSupply","params":["Xs6B6zawENwAbWVi7w92rjazLuAr5Az59qgWKcNb45x",{"commitment":"confirmed"}],"result_hash":"d88ebe44728bf481d6fbbd298c1f3441900187073a22f7fdb90069c9045cb1fb","slot":458572645},{"block":null,"method":"getAccountInfo","params":["Xs6B6zawENwAbWVi7w92rjazLuAr5Az59qgWKcNb45x",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":458572646},"value":{"data":["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","base64"],"executable":false,"lamports":5714160,"owner":"TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb","rentEpoch":18446744073709551615,"space":693}},"result_hash":"379291d0ce60b584e633315b43d22795c0572b252e1307892103d1da687228c8","slot":458572646},{"block":null,"method":"getProgramAccounts","params":["metaqbxxUerdq28cj1RbAWkYQm3ybzjb6a8bt518x1s",{"commitment":"confirmed","encoding":"base64","filters":[{"memcmp":{"bytes":"Xs6B6zawENwAbWVi7w92rjazLuAr5Az59qgWKcNb45x","offset":33}}]}],"result_hash":"4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945","slot":null}],"registry_entry":{"chain":"solana","contract":"Xs6B6zawENwAbWVi7w92rjazLuAr5Az59qgWKcNb45x","decimals":null,"issuer":"Backed xStocks","last_checked":"2026-10-18T20:40:19Z","name":"Berkshire Hathaway","source":"xstocks-api","source_url":"https://api.xstocks.fi/api/v2/public/assets","ticker":"BRK.B"},"registry_hash":"232d0be2eda56472709e0cf69b424df4c8dd39a27138a34cf3d57c8f428c0f9e","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":458572639,"subject":"B4UdLnvzCrnfRndLdgGTYZjcKTDsaFKB54cmKb2GoSne","ticker":"BRK.B","verdict":{"Verified":{"issuer":"Backed xStocks","ticker":"BRK.B"}},"version":1}
Signature
2UOlvIEOpXoc78mRe7bxOddjpxbc5pBvjVgc4q9yTV1y5niSCPrlIDkTAhUP9SxvYfyjQT2xBJ1FurUZi4CQBg==
API call
GET /api/attest/8513943aba6619f17d5517197a3dd077aca0ca725969e526ecd168233009e791
  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.