ISRC CALC42514916
Verified recording
CALC42514916 is “Waltzes, Op. 70: No. 2 in F Minor. Tempo giusto” by Frédéric Chopin,
registered on the CopyrightChains blockchain with CopyrightID
0x6c080d6cd1ca83196261c74192bd4d7b79b7dbc6b5f5bb54eed0595bf5c51380 and independently timestamped
in Bitcoin block 957118 on 2026-07-08.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALC42514916.
Recording identifiers
- ISRC
- CALC42514916
- Title
- Waltzes, Op. 70: No. 2 in F Minor. Tempo giusto
- Artist
- Frédéric Chopin
- CopyrightID (CopyrightChains transaction hash)
0x6c080d6cd1ca83196261c74192bd4d7b79b7dbc6b5f5bb54eed0595bf5c51380
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-08T03:20:19+00:00
- Bitcoin block
- 957118
- Canonical record hash
sha256:b234d5512ba97881562357b6b6abfe23e8da1808b4a580fc36cf0a561be8d7ee- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALC42514916
- Bitcoin block existence check
- https://blockstream.info/api/block/957118
Full record
Track page: Waltzes, Op. 70: No. 2 in F Minor. Tempo giusto · Machine-readable JSON-LD