{"projection_revision":6,"snapshot":"40281fb74597c3d5392a1904486fd75b","catalog_version":33437,"snapshot_created_at":"2026-10-21T21:17:10+00:00","snapshot_expires_at":"2026-10-22T21:17:10+00:00","source_changed_at":"2026-10-21T21:15:01+00:00","freshness_behavior":"materialized on first request after a committed source change; database triggers cover row writes and relationship writes","source_id_sha256":"a2bc4068f157b8e6d6075dbd6398f596ccf21fb02dc60e67b5f2ebf1469f85e7","source_content_sha256":"2742c65f17ea5928d067991af90718fac7aac0e3ca643c4652c267167bc8512f","total_catalog_pieces":8271,"canonical_url":"https://roadtovirtuosity.com/ai/catalog/pieces/1261?piece_id=1261","schema_version":"2.0","query":"","normalized_query":"","resolved_filters":{"piece_id":1261,"timezone":"UTC"},"sort":"relevance","projection":"full","total_matches":1,"returned":1,"page":1,"per_page":50,"total_pages":1,"previous_page_url":null,"next_page_url":null,"end_of_results":true,"alternate_formats":{"html":"https://roadtovirtuosity.com/ai/catalog/pieces/1261?page=1&piece_id=1261&projection=full&snapshot=40281fb74597c3d5392a1904486fd75b","json":"https://roadtovirtuosity.com/ai/catalog/pieces/1261.json?page=1&piece_id=1261&projection=full&snapshot=40281fb74597c3d5392a1904486fd75b","text":"https://roadtovirtuosity.com/ai/catalog/pieces/1261.txt?page=1&piece_id=1261&projection=full&snapshot=40281fb74597c3d5392a1904486fd75b"},"warnings":["Archive-only entries have unknown grading status. Zero points with Level 0 are pending. Positive points establish known grading, including beginner Level 0; explicit review declarations are preserved.","Strict taxonomy filters exclude unattributed records; search title text separately before deciding something is missing.","Work identity, musical sequence and completeness are unknown unless reviewed metadata is supplied. Catalog collections are existing subcategory groupings.","Historical first-publication dates are unknown. Date counts include only currently public entries with known first-publication dates.","File availability reports a public file reference, not a storage-health check."],"publication_count_scope":"currently public entries first published during the requested interval","unknown_publication_dates_before_date_filter":1,"distinct_work_count":null,"approximate_suggestions":[],"message":null,"pieces":[{"piece_id":1261,"title":"Czerny - Op. 139, No. 17","composer":["Czerny, Carl"],"composers":[{"id":2,"name":"Czerny, Carl"}],"instrument":["Piano"],"instruments":[{"id":1,"name":"Piano"}],"genre":"Classical","genre_id":1,"is_archive_only":false,"evaluation_eligible":true,"grading_status":"graded","grading_status_label":"Graded","points":1375,"level":3,"canonical_url":"https://roadtovirtuosity.com/czerny-op-139-no-17","instrument_points":[{"instrument_id":1,"instrument":"Piano","points":1375}],"collections":[],"collection_semantics":"existing catalog subcategory grouping","work_identifiers":[],"work_id":null,"book":null,"sequence_position":null,"movement_number":null,"movement_title":null,"key":null,"arrangement":null,"edition":null,"entry_scope":null,"completeness":"unknown","reviewed_enrichment":false,"availability_label":"Non-Commercial","has_download":true,"download_availability_basis":"public license category and existing file reference; storage health not verified","description":"Measures 1–8 set an Allegretto melody of short right-hand notes and small leaps above an even left-hand pattern of running eighth notes. The upper line pauses briefly as the first section closes and repeats.                                                    Measures 9–16 return to the same flowing bass while the right hand adds higher accents and a descending phrase. The motion eases into a concise two-hand cadence at the end.","created_at":"2023-11-04T23:52:28+00:00","first_published_at":null,"published_at":null,"updated_at":"2026-09-16T15:33:01+00:00","match_basis":"filters"}],"latest_catalog_version":33437,"source_lag_revisions":0}