ISRC DEF066509980
Verified recording
DEF066509980 is “Gräfin Mariza - Operetta in 3 Acts: Schwesterlein, Schwesterlein” by Emmerich Kálmán,
registered on the CopyrightChains blockchain with CopyrightID
0x8c58ff6ae04f31e182715d05ff6854557f744e76c7e83570c5bc6545931a6d9a and independently timestamped
in Bitcoin block 960418 on 2026-07-31.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF066509980.
Recording identifiers
- ISRC
- DEF066509980
- Title
- Gräfin Mariza - Operetta in 3 Acts: Schwesterlein, Schwesterlein
- Artist
- Emmerich Kálmán
- CopyrightID (CopyrightChains transaction hash)
0x8c58ff6ae04f31e182715d05ff6854557f744e76c7e83570c5bc6545931a6d9a
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-31T15:20:15+00:00
- Bitcoin block
- 960418
- Canonical record hash
sha256:b040c1f78d1e0aa5d50e5e201e7ca26cd1e3690833b5063d08dd3184aeff08a4- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF066509980
- Bitcoin block existence check
- https://blockstream.info/api/block/960418
Full record
Track page: Gräfin Mariza - Operetta in 3 Acts: Schwesterlein, Schwesterlein · Machine-readable JSON-LD