Believe it or not, the sealed-envelope procedure is actually a very common way to establish a presumption (albeit rebuttable) of originality.
The leading scholarly treatise on U.S. copyright law notes the following:
If the presumption of originality is challenged by conflicting evidence, the plaintiff may rely upon the device of proving deposit of a copy of his work with a nongovernmental depository, such as is provided by the Writers Guild of America, or by mailing a copy of the work to himself and then opening the sealed envelope in open court. Such procedure, although not conclusive, does tend to prove originality, and may at least conclusively establish that the plaintiff did not copy from the defendant when the envelope was sealed on a date prior to the established date of defendant's creation. In addition to other relevant evidence, expert testimony is admissible on the issue of plaintiff's originality.
Source: 4-13 Nimmer on Copyright § 13.01 (emphasis added) (footnotes omitted)
The treatise adds that the self-addressed sealed envelope procedure, unlike deposit with the Writers' Guild, "carries the risk that the trier of fact may conclude that the envelope was opened subsequent to mailing but prior to trial, the contents altered, and then resealed." However, based on a rapid review of a case in which this procedure was rejected by a court, I'd say that this risk is low unless the envelope actually
has been opened and resealed.
Another cheap way to establish originality would be bringing a new work before a notary and formally attesting to its creation. However, I'm aware of one copyright case in which even a notarized certificate was rejected as evidence by a judge, where the notary hadn't been brought before the court to testify!
Chupacabras said:
I read something like that sometime ago at the Photoforum. However, in photography, you can register a CD with thousands of low res images as one single work or collection (ie: "The photoart works of Chupacabras during May 2004"), so you will dramatically reduce per-image costs.
Perhaps there's a similar way in literature - to register a yearly collection of pieces as a single work. I mean, actually registering your copyright would be a better way to protect yourself, instead of allegations of postal seals and such.
Bear in mind that even producing a copyright registration certificate does no more than establish a presumption of originality in favor of the registrant (which presumption can also be established in other ways). This presumption could then be successfully challenged through adducing conflicting evidence - and conceivably such evidence could even include someone else producing a sealed envelope with a prior postmark.
Chupacabras said:
One more thing: as I understand, to start a fight for copyright infringement, you have to have your work registered at the copyright office, but it doesn't mean you must register prior to the infringement - that is, you can register only after you decide to start a legal fight.
With the exception of non-U.S. works benefiting from international treaty protection in the United States, this is true. Nevertheless, registration prior to the date of infringement confers several advantages, including the ability to claim additional damages.
The Central Scrutinizer said:
As I've indicated, it certainly can work, but it's not foolproof. Also as I suggested, the risk that it won't work is low if the claim is genuine, and rather higher if there's actually been some trickery with the envelope.
crimresearch said:
All that it proves is you sent an envelope on a certain date, there is no way to prove what was in it at the time. It is a simple trick to insert something in a 'sealed' envelope.
True, but the burden would be up to the other side to produce convincing evidence (presumably through costly expert testimony) that the envelope had been tampered with. The only cases I'm aware of where the sealed-envelope procedure failed were ones where there actually did seem to be some irregularity with the envelope or its contents and the expert witnesses easily picked up on it.
Ed said:
My understanding is that the Hague convention confers copyright the moment intellectual property is created. The issue is to show when.
You're thinking of the Berne Convention. But yes, that's the the general principle.