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.

“Discontinuance of dedicated Signature PDF format has made this task much more difficult”
Apple App Store · 3/5 · 2025-09-18

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 2671929919

Proof data

Record hash (SHA-256): 1f316cd98d23185e06661879314b1cf9b59b801211b1d2608eb7d2388a019701
Signature (Ed25519, base64): +hYLGDbA84aLfGeRwz0D6+u0CA7eHTCDNyY25MJefsQvbLtWIMA9UlDua61G9N61E8aQo4DUHXrT0RXTh97+DQ==
Merkle root: ffe0abae83fe32534ebead9dc4840cffa734701988d7729ea2741c63ce333209
Merkle path: ["1f298e8917fc42ae7dfde4a5104088a0f9796080f2e41952f26c5653916721c1","02748b8388e25e19a2034e52b3f53ab9009bc18fb66de3b93ed9baad6752842a","9dd6527a9b71dcceb315ae0bcdd4208e4657b70411ac70c07227ef4c37c65e4a","e143c33f6582ed3d7f96bb0d97d0eac457557a692cecfd20c9cd1df8283afe7d","c361a9e6c266721985e635df6902a2dd4a58cfe948faff394bf830f5da164db6","0a47b113b87878a8d71927b12d9bd5ccd9421f2906f98b1e2b8d398e45de122b","6d4bf5e9557a971b1761385c2486c84150f9d017aeceab4cef92d91b85794926","5c375801fe33abbad2994a744add2572465eb1ffbb126ce420e47016323cd893","275ce5c419f1c724a5039b0c8be6e0dbc8240fd1276917c91721cd4adc15ee89","5bd777d27226f44e5a4bc9493244a6bc001d41f781ec64856a302286f00524ff","a62bc497cf98a08469f24119f872664d8663675823947199ce96598ec12c2598","f25cabc34bdc1c3907585855d810ad27cc4caac426cbfd58fd93bd08ac5ed43b","849ed338e3b19bfd222d070ef2b6f25f2505730ef52ebcda9291b3aef8591b7a","a104e1c95f5429ec272490e6572eeda4db6dbedfc04ee0f94200f459c1d02cf8","4742e9987316174c17377563bbb971469480b811c365b9940f38dd437d53482e"]
Anchored: 2026-09-01
Public log entry: search.sigstore.dev, log index 2671929919 · entry 108e9186e8c5677afaac…
Expected log hash: b7a1aa2befa5caac7007c0b2e7b21cf5f700349fb9119336f4b3c994326ff20e 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":"v1788240211764","kind":"published-quote","locale":"en","page":"theme:acrobat/communication/en","quote":"Discontinuance of dedicated Signature PDF format has made this task much more difficult","rating":3,"review_date":"2025-09-18","source":"Apple App Store","source_url":"https://apps.apple.com/nz/app/id469337564?see-all=reviews","v":1}

Verify in the public log

Open the Rekor entry (pre-filled with this proof's log index).
In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (ffe0abae83fe…), which ties this proof's root to the log entry.
Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
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.