ISRC DEF057401201
Verified recording
DEF057401201 is “Piano Sonata No. 2 in B-Flat Minor, Op. 35: III. Marche funèbre” by Frédéric Chopin,
registered on the CopyrightChains blockchain with CopyrightID
0x0074c9edfa0ba4cb17b95fba9e52fd6e63e410edb6f45e9105ec28f9f0d8cbd2 and independently timestamped
in Bitcoin block 953520 on 2026-06-13.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057401201.
Recording identifiers
- ISRC
- DEF057401201
- Title
- Piano Sonata No. 2 in B-Flat Minor, Op. 35: III. Marche funèbre
- Artist
- Frédéric Chopin
- CopyrightID (CopyrightChains transaction hash)
0x0074c9edfa0ba4cb17b95fba9e52fd6e63e410edb6f45e9105ec28f9f0d8cbd2
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-06-13T13:32:09+00:00
- Bitcoin block
- 953520
- Canonical record hash
sha256:4ca89dae042536a9e3f1195be9b7c37589ac47a9877023a6213bb4dbc9a3cc40- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057401201
- Bitcoin block existence check
- https://blockstream.info/api/block/953520
Full record
Track page: Piano Sonata No. 2 in B-Flat Minor, Op. 35: III. Marche funèbre · Machine-readable JSON-LD