Hmm, gute Frage, wie etikettiert man eine Mp3 Datei so, dass dieses Etikett nicht mal eben beiläufig von Hinz und Kunz entfernt werden kann? Noch ein besonderes Tagformat in die Datei einfügen? Das darf dann niemand mehr verändern oder löschen? Und was passiert damit, wenn die Datei rekodiert wird? Also dann doch eher so etwas wie Steganografie benutzen, aber das ist auch nicht gegen Rekodierung gefeit. Ein steganografiertes Bild mit einbinden? Also irgendwie alles Blödsinn, diese Art von Schutzmechanismen.
Das Feld "COPYRIGHT" scheint zu passen, weil es sich wirklich um "Kopierrechte" handelt, siehe http://de.wikipedia.org/wiki/Creative_Commons
http://de.creativecommons.org/was-ist-cc/
Für meine eigenen Titel oder Bearbeitungen benutze ich gewöhnlich das Feld ENCODEDBY.
Siehe http://www.id3.org/id3v2.4.0-frames
4.2.2. Involved persons frames
TENC
The 'Encoded by' frame contains the name of the person or
organisation that encoded the audio file. This field may contain a
copyright message, if the audio file also is copyrighted by the
encoder.
Siehe auch 4.2.4. Rights and license frames
TCOP
The 'Copyright message' frame, in which the string must begin with a
year and a space character (making five characters), is intended for
the copyright holder of the original sound, not the audio file
itself. The absence of this frame means only that the copyright
information is unavailable or has been removed, and must not be
interpreted to mean that the audio is public domain. Every time this
field is displayed the field must be preceded with "Copyright " © "
", where © is one character showing a C in a circle.
TPRO
The 'Produced notice' frame, in which the string must begin with a
year and a space character (making five characters), is intended for
the production copyright holder of the original sound, not the audio
file itself. The absence of this frame means only that the production
copyright information is unavailable or has been removed, and must
not be interpreted to mean that the audio is public domain. Every
time this field is displayed the field must be preceded with
"Produced " (P) " ", where (P) is one character showing a P in a
circle.
TPUB
The 'Publisher' frame simply contains the name of the label or
publisher.
TOWN
The 'File owner/licensee' frame contains the name of the owner or
licensee of the file and it's contents.
TRSN
The 'Internet radio station name' frame contains the name of the
internet radio station from which the audio is streamed.
TRSO
The 'Internet radio station owner' frame contains the name of the
owner of the internet radio station from which the audio is
streamed.
DD.20090804.0814.CEST