ISRC DEF057230430
Verified recording
DEF057230430 is “Die lustige Witwe, Act II: No. 12, Finale: a. Ha! Ha! Wir fragen” by Franz Lehár,
registered on the CopyrightChains blockchain with CopyrightID
0x29b0b9b4e65c129667fb616cd3d3f91ff7d34caf77f4b6091e29e7fa28dce8e1 and independently timestamped
in Bitcoin block 957118 on 2026-07-08.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057230430.
Recording identifiers
- ISRC
- DEF057230430
- Title
- Die lustige Witwe, Act II: No. 12, Finale: a. Ha! Ha! Wir fragen
- Artist
- Franz Lehár
- CopyrightID (CopyrightChains transaction hash)
0x29b0b9b4e65c129667fb616cd3d3f91ff7d34caf77f4b6091e29e7fa28dce8e1
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-08T03:20:19+00:00
- Bitcoin block
- 957118
- Canonical record hash
sha256:c4928125dabc6da5fa9052b63e5f0effec122e4f36b075a6d3a546f38fc7f719- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057230430
- Bitcoin block existence check
- https://blockstream.info/api/block/957118
Full record
Track page: Die lustige Witwe, Act II: No. 12, Finale: a. Ha! Ha! Wir fragen · Machine-readable JSON-LD