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.

“was für das Lernen von Theorie absolut sinnfrei ist und in Sackgassen endet”

Checks (re-run on this request)

Proof data

Record hash (SHA-256)
453aeaa2c978ec4f2cdb3e89375c4b91b0d6c9a1e15371c261b662e1e82b03f6
Signature (Ed25519, base64)
jFIMwwPm+RO+2Au3JtpMYpmo0fIazPLNIsPlb4auCYfevic7Ki+LcqORwEmoQhN87sp4ery+3B3tBWSIo6DVBQ==
Merkle root
e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef
Merkle path
["453b06b62116730c1f0ef7754b4889707ed9cd1dbb0384e5393b54e38db813ca","f3140abe9624b179084d25b187af1812a7fe6a8047ef79cdd3e7d2f5829be2af","5374a72f88eb79b177c2de1b83993484dca231bc1df45e92930492501c7993a6","841d40075044eb119b542d1f78b31555a6d02fce7c3a27a5a538b662e07c3b87","58433504120b498128c45591f2505a0984f15efddaf22bdf5cfc056967d43bb3","69940b7073c7c453247b6a557d93344dddb22c1ace618c0ff1553c37b93c5b62","816cba6dfe9686cde9fb48a3e541e87cb7e6fad90ae9fa5ad27f89695f764e7d","42803f740938f475dfeb538cc339622ad18c3142f2e347d4166855b2b617c7be","bb86ac2826c70f7c2b498d0226fc4f090c02a2ccf76c68debac6402f9889e114","d7ef50371e983f3635d12dfc385e78e079fd233506ece1aee162d433f6a1a43b","15f2fad90dc8311e9265dc984e03cfa8427141500b294337071539027bdad228","f61ec008da9cedb952cfe797489f2f8391c0dd3d9db879feb9a9aa5b68ebbac5","b296372665f7c3838922f5e4d88b25d49437a77f990ac53d0dda027dc9495fe8","2e838893ef313b8ef0f87568e1e691fc197dfcee84413640a12968493decac73","bce5d442c07de6307e5ea8947098e74ce88c2246eda5e5fc1015a6d7519228a8"]
Anchored
2026-09-21
Public log entry
search.sigstore.dev, log index 2904877428 · entry 108e9186e8c5677ab408…
Expected log hash
d020708737f55ccdf49203f373fcbcefe8158cc388605556fbfda3c365de7360 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":"v1789881486272","kind":"published-quote","locale":"de","page":"theme:vaia/quality/de","quote":"was für das Lernen von Theorie absolut sinnfrei ist und in Sackgassen endet","rating":3,"review_date":"2026-09-15","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 (e299bf38720a…), 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.