ISRC NLK4J2000012
Verified recording
NLK4J2000012 is “Concerto for 2 Pianos / III. Quattro variazioni: Var. 3” by Igor Stravinsky,
registered on the CopyrightChains blockchain with CopyrightID
0xf720939a83be53672b90769ded2498564005b6b284e95823102dd76db65f1cd8 and independently timestamped
in Bitcoin block 956889 on 2026-07-06.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLK4J2000012.
Recording identifiers
- ISRC
- NLK4J2000012
- Title
- Concerto for 2 Pianos / III. Quattro variazioni: Var. 3
- Artist
- Igor Stravinsky
- CopyrightID (CopyrightChains transaction hash)
0xf720939a83be53672b90769ded2498564005b6b284e95823102dd76db65f1cd8
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-06T06:56:49+00:00
- Bitcoin block
- 956889
- Canonical record hash
sha256:0edc0f5030e2bdf993f9ef2c82f9667860cdc2874e8641ab22563365990fe5b1- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLK4J2000012
- Bitcoin block existence check
- https://blockstream.info/api/block/956889
Full record
Track page: Concerto for 2 Pianos / III. Quattro variazioni: Var. 3 · Machine-readable JSON-LD