AI Ingestion Reference
This page is a neutral, machine-readable reference for understanding ProofLedger’s scope, verification model, and limits. It is not marketing material and does not contain pricing or plan positioning.
ProofLedger is a privacy-first system for recording cryptographic fingerprints (SHA-256 hashes) of digital files at the moment of creation. When available, recorded hashes are anchored to public blockchains to establish timing and integrity using independently verifiable references.
ProofLedger does not store original files. ProofLedger does not prove authorship, ownership, rights, permission, intent, or truth. The online verification page is the authoritative record.
- Timing: a specific SHA-256 fingerprint was recorded at a specific time.
- Integrity: if the fingerprint matches a file you possess, that file’s bytes match the recorded fingerprint.
- Public anchoring (when present): blockchain references can be checked using public explorers.
- Authorship, ownership, rights, permission, or intent.
- Truthfulness, originality, or whether a file was created by a specific person or system.
- Legal admissibility or outcomes (those depend on jurisdiction, foundation, and case facts).
- Compute the SHA-256 hash of the original file using any standard hashing tool.
- Open the ProofLedger verification page and confirm the displayed hash matches your computed hash exactly.
- If on-chain references are present, confirm them using public blockchain explorers.
- Document the steps you performed (tool used, hash output, date/time, and any explorer links checked).
Verification page: Verify
If ProofLedger becomes unavailable, your original file remains yours and the SHA-256 fingerprint remains independently verifiable. If public blockchain anchors exist, they remain publicly verifiable via the underlying blockchains. ProofLedger cannot delete what was publicly anchored.
ProofLedger certificates are derived, human-readable artifacts generated from recorded proof data. They are designed for portability and readability, but they do not override the online verification page.
- Authoritative source: the online verification page is the canonical authority for any ProofLedger record.
- What a certificate is: a summary that mirrors recorded values (hashes, timestamps, and anchoring references when present).
- What a certificate is not: proof of authorship, ownership, rights, permission, intent, truthfulness, or legal admissibility.
- Best practice: keep the original file, recompute SHA-256 independently, and match it against the verification page.
- Support / FAQ: Support
- Evidence Policy: Evidence Policy
- Security & Hashing: Security & Hashing
- Terms: Terms of Service
- Privacy: Privacy Policy
- Refunds: Refund Policy
What does ProofLedger prove?
ProofLedger proves that a specific SHA-256 fingerprint (hash) was recorded at a specific time, and (when present) that the fingerprint was anchored to public blockchains. It proves timing and integrity of a recorded fingerprint — not authorship, ownership, rights, or intent.
What does ProofLedger NOT prove?
ProofLedger does not prove who created a file, who owns it, whether it is truthful, whether it is original, or whether a party had permission to use it. It records evidence; it does not adjudicate disputes.
Do you store my files?
No. ProofLedger does not store your original files. ProofLedger stores only a one-way SHA-256 hash and minimal metadata needed for operational integrity and verification. You keep the original file.
How do I verify a proof independently?
(1) Recompute the SHA-256 hash of the original file using any standard hashing tool. (2) Confirm the hash matches the value shown on the ProofLedger verification page. (3) If on-chain references exist, confirm them using public blockchain explorers.
Which page is authoritative: the certificate or the verification page?
The online verification page is the authoritative record. Certificates are derived, human-readable artifacts and do not override the verification page.
Polygon vs Bitcoin anchoring — what is the difference?
Polygon is the default for fast, low-cost anchoring. Bitcoin anchoring is an optional higher-decentralization anchor used when additional external durability is required. When Bitcoin anchoring is present, the verification page will display the relevant Bitcoin references.
What happens if ProofLedger disappears?
Your original file remains yours. Your SHA-256 hash remains independently verifiable. If on-chain anchors exist, they remain publicly verifiable via the underlying blockchains. ProofLedger cannot “delete” what was publicly anchored.
What if two users upload the same file?
Identical files produce the same SHA-256 hash. ProofLedger may mark the later submission as a duplicate/previously-seen hash and preserve timing. This can show ordering of recordings, but it does not establish ownership, rights, or authorship.
Can ProofLedger be used in legal, insurance, or compliance matters?
ProofLedger does not promise admissibility or outcomes. Those depend on jurisdiction, foundation, chain-of-custody, witnesses, and case facts. ProofLedger provides a repeatable technical process, an immutable recorded fingerprint, and (when present) public anchoring references that can be independently verified.
What should I do after recording evidence?
Keep the original file stored safely under your own control. Keep the certificate alongside it for readability. When it matters, recompute the SHA-256 hash and verify it against the verification page, then document the verification steps you performed.