Copyright notices on a creative work are like a padlock on a garden shed: it serves to keep honest people honest.
However, according to the U.S. government, the proper form of a copyright notice is: Copyright © 2010 by John Q. Smith, all rights reserved. I'll explain the why's of this form in detail.
This is a sentence. The word "copyright" should always be capitalized and the word "reserved" should always be followed by a period.
The circle-C "©" symbol should always follow the word "copyright," never precede it or stand in lieu of it. On Windows keyboards, you can get the "©" symbol by holding down the "Alt" key and typing "0169" on the number pad.
The date should be the year of release, not the year of creation. This confuses people. The year of release is the year in which any copy of any portion of the work leaves your possession. If you share it, post it, sell it, publish it, or otherwise send it out there, you are releasing it.
For words with multiple releases, the date should cover the period from the first release through the latest release, e.g., 1994–2010. If all editions are in the same decade, conventional date shortening may be used, e.g,. 2004–10. Note that in formal writing (which a copyright notice, being legalese, is) the dash between the years is an en-dash "–", not a hyphen "-". (If you don't know the difference, you don't know how to do formal writing.) You can get an en-dash from your Windows keyboard by holding down the "Alt" key and typing "0150" on the number pad.
The date may be in Roman numerals, although this is not encouraged. You'll see Roman numerals used a lot in films, especially older ones. "2010" in Roman numerals is "MMX."
The word "by" should not be replaced by a comma (a common error), as it is a preposition indicating who holds the copyright, i.e., that the name following it is the owner of the copyright and not some random person/entity.
The name should be the legal name of the person or entity holding the copyright. It should never be a shortened version of the name, such as a nickname ("Bill" instead of "William"). If of a person, it should include that person's middle initial, to further define the owner.
The name should never be the name of an unincorporated business. Unincorporated businesses are not legal entities per se, and cannot legally own things. It is the owners of such businesses who can own things. Do not use "JQS Photography" as the name of the copyright holder unless "JQS Photography" is incorporated, in which case it's legal name would be "JQS Photography, Inc." or whatever variant it was incorporated under.
Notice that "JQS Photography, Inc." ends with a period. This period is a part of the abbreviation "Inc." and this a part of the name. It does not replace the comma following the name: Copyright © 2010 by JQS Photography, Inc., all rights reserved.
The words "all rights reserved" are a subordinate clause within a sentence. It should always be set off from the body of the sentence by a comma (the comma following the name) and should not be capitalized. This is the clause that states that the copyright holder is reserving all rights of reproduction to him/her/itself. Those three words have a specific meaning under the law. Don't mess around with them, you'll only mess yourself up.
And now you'll say, "Big deal, so what if my notice is different." Fine! Have it your way. If you have it your way and wind up in a court case, maybe you'll prevail, and maybe you won't. Just be aware that there are plenty of cases where fortunes have been lost because of a misplaced comma. Federal court is NOT the internet. Bad grammar DOES matter.