ISRC NLA507708531
Verified recording
NLA507708531 is “Mazurka No. 31 in A flat Op. 50 No. 2” by Frédéric Chopin,
registered on the CopyrightChains blockchain with CopyrightID
0xb4734c837a91f33bb6800cf294a3ba201d2f0229b14a39a370770f1c98aeaa5a and independently timestamped
in Bitcoin block 960334 on 2026-07-31.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA507708531.
Recording identifiers
- ISRC
- NLA507708531
- Title
- Mazurka No. 31 in A flat Op. 50 No. 2
- Artist
- Frédéric Chopin
- CopyrightID (CopyrightChains transaction hash)
0xb4734c837a91f33bb6800cf294a3ba201d2f0229b14a39a370770f1c98aeaa5a
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-31T02:19:15+00:00
- Bitcoin block
- 960334
- Canonical record hash
sha256:b6780a5f2969837b4faf4098f18a7029e2b5eff2c61bbfb8b9bb94a8b9e3dce4- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA507708531
- Bitcoin block existence check
- https://blockstream.info/api/block/960334
Full record
Track page: Mazurka No. 31 in A flat Op. 50 No. 2 · Machine-readable JSON-LD