ISRC NLK4J2000013
Verified recording
NLK4J2000013 is “Concerto for 2 Pianos / III. Quattro variazioni: Var. 4” by Igor Stravinsky,
registered on the CopyrightChains blockchain with CopyrightID
0x8c0165707fd1e05790d3da11f715c1a9f2a8703459941f503ab60732a215a271 and independently timestamped
in Bitcoin block 960327 on 2026-07-31.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLK4J2000013.
Recording identifiers
- ISRC
- NLK4J2000013
- Title
- Concerto for 2 Pianos / III. Quattro variazioni: Var. 4
- Artist
- Igor Stravinsky
- CopyrightID (CopyrightChains transaction hash)
0x8c0165707fd1e05790d3da11f715c1a9f2a8703459941f503ab60732a215a271
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-31T00:26:26+00:00
- Bitcoin block
- 960327
- Canonical record hash
sha256:73b41d272afbe85a7203b85d6d822708709f707d7b06573e1377fb6f91317679- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLK4J2000013
- Bitcoin block existence check
- https://blockstream.info/api/block/960327
Full record
Track page: Concerto for 2 Pianos / III. Quattro variazioni: Var. 4 · Machine-readable JSON-LD