Proof
The record

The investigation record no one can silently erase or rewrite — including us.

How it holds

Fingerprint. Sign. Chain. Anchor.

A findingwith its source
and its author
SHA-256a fingerprint
of the entry
Ed25519signed with a key
whose public half we publish
The chaineach entry seals
the one before
₿ Bitcoinanchored when the work
is shared or published
The ledger

Who said what, when, and from which source.

LedgerDusit Central Parkchain intact
#0410Question asked · yousigned ✓
#0411Source added · Dusit 56-1 [1] · agentsigned ✓
#0412Claim · 70 % / 30 % [1][2][3] · agentsigned ✓
#0414Marked · two addresses [1][5] · yousigned ✓
#0415Shared · anchored to Bitcoin✓
Check it without us

An open-source verifier, offline.

Hashes, signatures and the Bitcoin anchor, checked on your own machine. Our servers are not asked.

Terminalopen source · MIT
$ symphoria-verify dusit-central-park.zip ✓ content hashes match the manifest ✓ Ed25519 signatures verify ✓ chain intact, 6 entries · Bitcoin anchor: confirmed once shared Runs offline. Our servers are not asked.

Illustrative output

Removable by design

Shut us down and the record still checks out.

Hard questions

What the record can and cannot do.

If a court orders you to remove a record, what happens?

The content on our servers can be removed. The cryptographic anchors on Bitcoin cannot, not by us, not by the court, not by any successor to either. So if one still holds the copy, the fact of the investigation can’t be refuted.

How do you stop someone from inscribing fabricated evidence?

Every entry on the ledger carries the cryptographic signature of the investigator who entered it and the fingerprint of the source they drew from. The reader can see who said what was so, and what they relied on. Whether the source tells the truth remains the reader’s work, as with any record.

A permanent record can be used against the people it was meant to serve. Who is protected?

Allies can verify the signature of the originating party, and verify the truth only if they also hold the copy. Adversaries can see the hash chain on Bitcoin, but without the original copy it is impossible to decode it into meaningful information.

Is private work anchored too?

No. Private work stays off-chain. An investigation is anchored when it is shared, published or gets a collaborator.