Quote verification

This proves the quote below is recorded by Citatio exactly as displayed and has not been altered since it was committed and anchored. It documents Citatio's crawl observation; it does not imply endorsement by the source platform. The quote links to the original review.

“Glückwunsch an die Entwickler.”

Checks (re-run on this request)

• ✓ Signature — Ed25519 signature over the record hash, verified against the public key at /.well-known/citatio-signing.json
• ✓ Merkle inclusion — Leaf recomputed through the sibling path to the anchored root
• ✓ Public transparency log — Sigstore Rekor log index 2907673729

Proof data

Record hash (SHA-256)

e9ff7431d101262387832e0987be02eb397b54d5c513cd07f4cf72dfae90ec7a

Signature (Ed25519, base64)

odLUMaMezwMEkVWgK371o5c0m4UpauwVT/j+GXLHfjSOvofYg4ZBHhMvf8UQVsxo9x01XyS0maRV019S2gniDg==

Merkle root

b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02

Merkle path

["e9ff7943bb9e54c1e1894cbf9d918d132903dffe241775dde19eb56bb024c98b","465e7070dc5a699caffd0f8007f543beb4a7eb08a2e2082aa803af0bb19dba72","f00c5dca600d3f0654c1b59d60dbe5d52dbb4376786770952df50a9c354d99a9","460bca43652631a7c28c4a23f5e8ac917cc4f9f3711642220e71808452e8cbcd","60ca5fd5df57a436e1ef7d42a7929ebfd22a857f0eec0f8cbffd651efa25ba2e","ddbe2b91b663e8a9dd5aa735a31f6be4f3f085de89063ce5d925c6293e5c4fdc","2c3f8a33fdab3a6935df1864cd6e6a64449e761044f5e7bd5ea0ab4443e00cd7","c3f14ff07f23c9873e4ed09958016a181b0fb44e15d4c004fb22797d397cf221","86994c23bd8868838e9a5db1abc7494dc6ef962f3ecad77b56ec3887bde6444f","042f0fec74521bc48ab41f2464714f41d7bee9882be5ad30840278c9559da714","bb894289bb71d3b696c9afbe454a75a78b206d9839b23e1a62e36de1c4316674","2d0841904d905b327cb803816e73e56fa86447bd28a90f792c27c874ed9a6b9c","c975f4076f62a76765a4bc502e988829db65110a1650004b828d2dfb5f90a9da","f92a7fda99af63eb008476cac47b147880eec6868f847624f8b438c917195408","4543e8b9ac7bd077d9526acfdae449f0a0d5517cbb42414f50ef930ecdb9470b"]

Anchored

2026-09-22

Public log entry

search.sigstore.dev, log index 2907673729 · entry 108e9186e8c5677a06ea…

Expected log hash

bf9a74000249ba6e66b1e29aae9d8cb95c3400dc118569a80e5c0949f3e8ac62 The log entry's spec.data.hash.value must equal this value: the SHA-256 of the Merkle root string above. Recompute it yourself from the root to confirm.

Canonical record

{"dataset_version":"v1789969984102","kind":"published-quote","locale":"de","page":"theme:vaia/communication/de","quote":"Glückwunsch an die Entwickler.","rating":5,"review_date":"2026-04-24","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","v":1}

Verify in the public log

1. Open the Rekor entry (pre-filled with this proof's log index).
2. In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (b9a08f9d6d76…), which ties this proof's root to the log entry.
3. Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
4. The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
5. Locally, without any Citatio infrastructure: SHA-256 the canonical record (must equal the record hash), verify the Ed25519 signature against the public key, and fold the hash through the Merkle path (sorted-pair SHA-256) to reach the anchored root.