ISRC DEF057430621
Verified recording
DEF057430621 is “24 Preludes, Op. 28: No. 21 in B-Flat Major. Cantabile - Recorded 1974” by Frédéric Chopin,
registered on the CopyrightChains blockchain with CopyrightID
0x0de859578cff54074e4b2057d860db27c52d44c26f8cf9acd32384cce5133892 and independently timestamped
in Bitcoin block 960170 on 2026-07-29.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057430621.
Recording identifiers
- ISRC
- DEF057430621
- Title
- 24 Preludes, Op. 28: No. 21 in B-Flat Major. Cantabile - Recorded 1974
- Artist
- Frédéric Chopin
- CopyrightID (CopyrightChains transaction hash)
0x0de859578cff54074e4b2057d860db27c52d44c26f8cf9acd32384cce5133892
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-29T23:52:38+00:00
- Bitcoin block
- 960170
- Canonical record hash
sha256:8a81d9b5393d6d2e9756f9d45137c910d453afba1d8526073348002b17b5b050- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057430621
- Bitcoin block existence check
- https://blockstream.info/api/block/960170
Full record
Track page: 24 Preludes, Op. 28: No. 21 in B-Flat Major. Cantabile - Recorded 1974 · Machine-readable JSON-LD