ISRC DEF057900726
Verified recording
DEF057900726 is “Polonaise in A-Flat Major, Op. 53 "Heroic": Maestoso - Pt. 6” by Frédéric Chopin,
registered on the CopyrightChains blockchain with CopyrightID
0xc3522f3c2f9fde6c1592ea6526a4d5c637446692c95e9d82ca090c506ae868c7 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/DEF057900726.
Recording identifiers
- ISRC
- DEF057900726
- Title
- Polonaise in A-Flat Major, Op. 53 "Heroic": Maestoso - Pt. 6
- Artist
- Frédéric Chopin
- CopyrightID (CopyrightChains transaction hash)
0xc3522f3c2f9fde6c1592ea6526a4d5c637446692c95e9d82ca090c506ae868c7
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-08T03:20:19+00:00
- Bitcoin block
- 957118
- Canonical record hash
sha256:4682ce3d9be2ca92549f4e3489a17f8160db202b8c69f09a6ba031153b1f18c9- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057900726
- Bitcoin block existence check
- https://blockstream.info/api/block/957118
Full record
Track page: Polonaise in A-Flat Major, Op. 53 "Heroic": Maestoso - Pt. 6 · Machine-readable JSON-LD