ISRC USBC19300507
Verified recording
USBC19300507 is “Mazurka No. 3 in C-Sharp Minor, Op. 50” by Frédéric Chopin,
registered on the CopyrightChains blockchain with CopyrightID
0x0c3c58f9bc2d208c5d53a11447dbba05746e8e6edaa28f1d0f3834d3c9304d9a and independently timestamped
in Bitcoin block 960099 on 2026-07-29.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC19300507.
Recording identifiers
- ISRC
- USBC19300507
- Title
- Mazurka No. 3 in C-Sharp Minor, Op. 50
- Artist
- Frédéric Chopin
- CopyrightID (CopyrightChains transaction hash)
0x0c3c58f9bc2d208c5d53a11447dbba05746e8e6edaa28f1d0f3834d3c9304d9a
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-29T11:30:20+00:00
- Bitcoin block
- 960099
- Canonical record hash
sha256:b8387a0e62ec76db1779c780ab21c74882aa9e74971a38e32f281b342c4bd5e2- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC19300507
- Bitcoin block existence check
- https://blockstream.info/api/block/960099
Full record
Track page: Mazurka No. 3 in C-Sharp Minor, Op. 50 · Machine-readable JSON-LD