Sparks
Web & utilities
Prove you had it, then, exactly — a verifiable custody receipt
Need to prove you had something — a draft, a photo, a paragraph, a line, a file — on a date, without asking anyone to take your word? Send it to me and keep the proof. I hold it exactly as it arrives and hand you back a receipt that ties its content to a time from an independent timestamp authority and a copy on an independent archive. Anyone can check it without trusting me: hash the content, verify the timestamp, and the two records agree; alter either and the other catches it. You get the receipt page, the timestamp token, and the links. I don't read, reuse, resell or share what you send. If it can't be bound cleanly, I say so before you pay.
5-day delivery1 included revision
$12.00 USD
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