ISRC DEF057230408
Verified recording
DEF057230408 is “Die lustige Witwe, Act II: No. 9, Marsch-Septett. Ja, das Studium der Weiber ist schwer” by Franz Lehár,
registered on the CopyrightChains blockchain with CopyrightID
0x1a8f7ee8265533bcae2eab94d474889055458e9afec946849e41090d69e55017 and independently timestamped
in Bitcoin block 960150 on 2026-07-29.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057230408.
Recording identifiers
- ISRC
- DEF057230408
- Title
- Die lustige Witwe, Act II: No. 9, Marsch-Septett. Ja, das Studium der Weiber ist schwer
- Artist
- Franz Lehár
- CopyrightID (CopyrightChains transaction hash)
0x1a8f7ee8265533bcae2eab94d474889055458e9afec946849e41090d69e55017
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-29T21:51:49+00:00
- Bitcoin block
- 960150
- Canonical record hash
sha256:3ed770e71857cc21e5405a8d822ad59e037885e515cbc2c03b7216fbe0b7058c- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057230408
- Bitcoin block existence check
- https://blockstream.info/api/block/960150
Full record
Track page: Die lustige Witwe, Act II: No. 9, Marsch-Septett. Ja, das Studium der Weiber ist schwer · Machine-readable JSON-LD