ISRC DEF066810540
Verified recording
DEF066810540 is “The Merry Widow (Die lustige Witwe) / Act 1: Da geh' ich ins Maxim” by Franz Lehár,
registered on the CopyrightChains blockchain with CopyrightID
0xcfdff415334b3842940bfdbeab0ddf404c54f63ac2a5fc0f4e0537a9c0b1ff94 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/DEF066810540.
Recording identifiers
- ISRC
- DEF066810540
- Title
- The Merry Widow (Die lustige Witwe) / Act 1: Da geh' ich ins Maxim
- Artist
- Franz Lehár
- CopyrightID (CopyrightChains transaction hash)
0xcfdff415334b3842940bfdbeab0ddf404c54f63ac2a5fc0f4e0537a9c0b1ff94
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-30T09:37:10+00:00
- Bitcoin block
- 960236
- Canonical record hash
sha256:829ac03bbf3aa95e034267cd11a216760c62097f9cacd1737e26f3d84b224dd9- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF066810540
- Bitcoin block existence check
- https://blockstream.info/api/block/960236
Full record
Track page: The Merry Widow (Die lustige Witwe) / Act 1: Da geh' ich ins Maxim · Machine-readable JSON-LD