ISRC QZ8251702820
Verified recording
QZ8251702820 is “Nostalgia” by Justus Rümenapp,
registered on the CopyrightChains blockchain with CopyrightID
0xfe8df1314fba54599a9c4d2fac4865860f4a2c1f7f37fab6b9e2c08cfe52fec9 and independently timestamped
in Bitcoin block 960138 on 2026-07-29.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ8251702820.
Recording identifiers
- ISRC
- QZ8251702820
- Title
- Nostalgia
- Artist
- Justus Rümenapp
- CopyrightID (CopyrightChains transaction hash)
0xfe8df1314fba54599a9c4d2fac4865860f4a2c1f7f37fab6b9e2c08cfe52fec9
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-29T19:35:34+00:00
- Bitcoin block
- 960138
- Canonical record hash
sha256:515775cb964d4dea7747afa78c11c7012335434063be0c662603f16ff6a1676c- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ8251702820
- Bitcoin block existence check
- https://blockstream.info/api/block/960138