I can't figure out how to access the copyright symbol

On a Mac: try alt (or "option") and "g"

From Wikipedia's "Copyright Symbol" entry , under the subhead "Character":
"Because the © symbol has long been unavailable on typewriters and ASCII-based computer systems, it has been common to approximate this symbol with the characters (c); however, this approximation has no standing in law.[3]

"The character is mapped in Unicode as U+00A9 ©​ copyright sign (HTML: © ©).[4] On Windows it may be entered by means of Alt codes, by holding the Alt key while typing the numbers 0169 on the numeric keypad. On Macintosh systems, it may be entered with ⌥G.

"Unicode also has U+24B8 Ⓒ​ circled latin capital letter c (HTML: Ⓒ) and U+24D2 ⓒ​ circled latin small letter c (HTML: ⓒ).[5] They are sometimes used as a substitute copyright symbol where the actual copyright symbol is not available in the font or in the character set, for example, in some Korean code pages."