ISRC DEF066810550
Verified recording
DEF066810550 is “The Merry Widow (Die lustige Witwe) / Act 1: Polonaise und Ballett” by Franz Lehár,
registered on the CopyrightChains blockchain with CopyrightID
0x40b1d6529159677fd51d789f678dab9fca702b8f4c07602dad990fed4038561c and independently timestamped
in Bitcoin block 960236 on 2026-07-30.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF066810550.
Recording identifiers
- ISRC
- DEF066810550
- Title
- The Merry Widow (Die lustige Witwe) / Act 1: Polonaise und Ballett
- Artist
- Franz Lehár
- CopyrightID (CopyrightChains transaction hash)
0x40b1d6529159677fd51d789f678dab9fca702b8f4c07602dad990fed4038561c
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-30T09:37:10+00:00
- Bitcoin block
- 960236
- Canonical record hash
sha256:3185104f24b2ca733f8b8c1bd9c13b81061c56f7fdfb271b4a408584a529e590- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF066810550
- Bitcoin block existence check
- https://blockstream.info/api/block/960236
Full record
Track page: The Merry Widow (Die lustige Witwe) / Act 1: Polonaise und Ballett · Machine-readable JSON-LD