ISRC QZFP52369155
Verified recording
QZFP52369155 is “Unending Sorrow” by Ma Čka,
registered on the CopyrightChains blockchain with CopyrightID
0x436b98b41737f5b1290c266ab7b9a52f5a9046919542f42ab5ca43e9ce0a7106 and independently timestamped
in Bitcoin block 960481 on 2026-07-31.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFP52369155.
Recording identifiers
- ISRC
- QZFP52369155
- Title
- Unending Sorrow
- Artist
- Ma Čka
- CopyrightID (CopyrightChains transaction hash)
0x436b98b41737f5b1290c266ab7b9a52f5a9046919542f42ab5ca43e9ce0a7106
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-31T23:51:35+00:00
- Bitcoin block
- 960481
- Canonical record hash
sha256:6106fa24e07c0395c023f3161f669e2e69154b6014997c513b79f8b36d5a4981- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFP52369155
- Bitcoin block existence check
- https://blockstream.info/api/block/960481