ISRC CALC42514915
Verified recording
CALC42514915 is “Waltzes, Op. 34: No. 3 in F Major. Vivace” by Frédéric Chopin,
registered on the CopyrightChains blockchain with CopyrightID
0xb7f0e7171b3c992643f6353fba282789e4a3f66ab6836817f601d5f2519a5617 and independently timestamped
in Bitcoin block 960419 on 2026-07-31.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALC42514915.
Recording identifiers
- ISRC
- CALC42514915
- Title
- Waltzes, Op. 34: No. 3 in F Major. Vivace
- Artist
- Frédéric Chopin
- CopyrightID (CopyrightChains transaction hash)
0xb7f0e7171b3c992643f6353fba282789e4a3f66ab6836817f601d5f2519a5617
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-31T15:20:33+00:00
- Bitcoin block
- 960419
- Canonical record hash
sha256:e8b27c6d970cb932cbaa4a3ada9017503333eea46ccf8837e041b49061f57e99- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALC42514915
- Bitcoin block existence check
- https://blockstream.info/api/block/960419
Full record
Track page: Waltzes, Op. 34: No. 3 in F Major. Vivace · Machine-readable JSON-LD