Comment by dbuidl

The billboard lives in the blockchain, it also generates its metadata in it.

For example, this is the current metadata being generated right now when someone calls the "tokenURI(1)" method:

data:application/json;base64,eyJuYW1lIjogIlRoZSBCaWxsYm9hcmQiLCAiZGVzY3JpcHRpb24iOiAiRnVsbHkgb24gY2hhaW4gYmlsbGJvYXJkLiBUaGlzIE5GVCBkaXNwbGF5cyB0aGUgbGF0ZXN0IHRleHQgc3RvcmVkIGluIFRoZSBCaWxsYm9hcmQgKDMgbGluZXMgb2YgNTAgYnl0ZXMgZWFjaCkgYW5kIGFsbG93cyBpdHMgb3duZXIgdG8gY29udHJvbCB0aGUgY29udHJhY3QgYmFsYW5jZS4iLCAiaW1hZ2UiOiAiZGF0YTppbWFnZS9zdmcreG1sO2Jhc2U2NCxQSE4yWnlCNGJXeHVjejBuYUhSMGNEb3ZMM2QzZHk1M015NXZjbWN2TWpBd01DOXpkbWNuSUhCeVpYTmxjblpsUVhOd1pXTjBVbUYwYVc4OUozaE5hVzVaVFdsdUlHMWxaWFFuSUhacFpYZENiM2c5SnpBZ01DQTFOVEFnTWpVd0p6NDhjM1I1YkdVK0xtSmhjMlVnZXlCbWFXeHNPaUIzYUdsMFpUc2dabTl1ZEMxbVlXMXBiSGs2SUhOaGJuTXRjMlZ5YVdZN0lHWnZiblF0YzJsNlpUb2dNakp3ZURzZ2ZUd3ZjM1I1YkdVK1BISmxZM1FnZDJsa2RHZzlKekV3TUNVbklHaGxhV2RvZEQwbk1UQXdKU2NnWm1sc2JEMG5ZbXhoWTJzbklDOCtQSFJsZUhRZ2VEMG5OVEFsSnlCNVBTY3pOU1VuSUdOc1lYTnpQU2RpWVhObEp5QmtiMjFwYm1GdWRDMWlZWE5sYkdsdVpUMG5iV2xrWkd4bEp5QjBaWGgwTFdGdVkyaHZjajBuYldsa1pHeGxKejVEYUdWamF5QnZkWFFnVW5WdFlteGxJRXR2Ym1jZ1RHVmhaM1ZsUEM5MFpYaDBQangwWlhoMElIZzlKelV3SlNjZ2VUMG5OVEFsSnlCamJHRnpjejBuWW1GelpTY2daRzl0YVc1aGJuUXRZbUZ6Wld4cGJtVTlKMjFwWkdSc1pTY2dkR1Y0ZEMxaGJtTm9iM0k5SjIxcFpHUnNaU2MrY21WaFpDQjBhR1VnUzI5dVoxQmhjR1Z5SUc5dU9qd3ZkR1Y0ZEQ0OGRHVjRkQ0I0UFNjMU1DVW5JSGs5SnpZMUpTY2dZMnhoYzNNOUoySmhjMlVuSUdSdmJXbHVZVzUwTFdKaGMyVnNhVzVsUFNkdGFXUmtiR1VuSUhSbGVIUXRZVzVqYUc5eVBTZHRhV1JrYkdVblBtaDBkSEJ6T2k4dmQzZDNMbkoxYldKc1pXdHZibWRzWldGbmRXVXVZMjl0THp3dmRHVjRkRDQ4TDNOMlp6ND0ifQ==