ISRC DEF066509920
Verified recording
DEF066509920 is “Gräfin Mariza - Operetta in 3 Acts: Sag ja, mein Lieb', sag ja” by Emmerich Kálmán,
registered on the CopyrightChains blockchain with CopyrightID
0xe634356c7f42471e9980da23956610d31b66c22b312f4275558bd1fc9397b7ed and independently timestamped
in Bitcoin block 960284 on 2026-07-30.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF066509920.
Recording identifiers
- ISRC
- DEF066509920
- Title
- Gräfin Mariza - Operetta in 3 Acts: Sag ja, mein Lieb', sag ja
- Artist
- Emmerich Kálmán
- CopyrightID (CopyrightChains transaction hash)
0xe634356c7f42471e9980da23956610d31b66c22b312f4275558bd1fc9397b7ed
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-30T17:23:26+00:00
- Bitcoin block
- 960284
- Canonical record hash
sha256:25e1ac0dcb25798526d7d4d3a633ff515ab433c9b215fcb9c72de5bd69128c3a- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF066509920
- Bitcoin block existence check
- https://blockstream.info/api/block/960284
Full record
Track page: Gräfin Mariza - Operetta in 3 Acts: Sag ja, mein Lieb', sag ja · Machine-readable JSON-LD