ISRC DEF057900725
Verified recording
DEF057900725 is “Polonaise in A-Flat Major, Op. 53 "Heroic": Maestoso - Pt. 5” by Frédéric Chopin,
registered on the CopyrightChains blockchain with CopyrightID
0x764329d2ddd9cb0c156c0fd8a753f1a66989ee7866bda5a31487fce11fdb37a3 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/DEF057900725.
Recording identifiers
- ISRC
- DEF057900725
- Title
- Polonaise in A-Flat Major, Op. 53 "Heroic": Maestoso - Pt. 5
- Artist
- Frédéric Chopin
- CopyrightID (CopyrightChains transaction hash)
0x764329d2ddd9cb0c156c0fd8a753f1a66989ee7866bda5a31487fce11fdb37a3
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-08T03:20:19+00:00
- Bitcoin block
- 957118
- Canonical record hash
sha256:2a8a47448cb0fb6939198090c8733a078a835725f53749e0f90560e77461e44e- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057900725
- Bitcoin block existence check
- https://blockstream.info/api/block/957118
Full record
Track page: Polonaise in A-Flat Major, Op. 53 "Heroic": Maestoso - Pt. 5 · Machine-readable JSON-LD