Do you have a template to print on this labels? Just wanted to print poems or songs in large quantities on both sheets.

We do offer free templates and software for all of our products. Below is a direct link to the available template options for the OL2124. You can also locate these on the product page or by going to Design & Templates at the top of our website. https://www.onlinelabels.com/templates/OL2124-template.htm

Will this product run on a Canon C700?

The Blockout for Laser (BT) material works well on most laser printers. Although we have not tested it with this specific printer model, we have printed the material on our large digital presses with success. You're welcome to visit the link below to request free samples of this product for testing with your Canon C700. https://www.onlinelabels.com/samples

Is the backing paper perforated between the 2 lables?

This item is not perforated between the labels. However, if you need perforations we can create it as a custom item for you. If you are interested in this, please reach out to our Customer Service Team and we would be happy to provide quotes and walk you through the process. You can also request samples of this item at the link below if you would like to test this product before placing an order. https://www.onlinelabels.com/samples

I received samples of 4 x 6 labels, but they do not work on either Etsy or Pirateship platforms as part of the label gets cut off. Does this size, 7"x5", print accurately on both of these platforms?

The OL2124 is commonly used for eBay rather than Etsy or Pirate Ship. Below are links to our Etsy and Pirate Ship shipping label options for your review. https://www.onlinelabels.com/uses/etsy-shipping-labels https://www.onlinelabels.com/uses/shipping-labels#gPirateShipShippingLabels