ISRC DEF057900724
Verified recording
DEF057900724 is “Polonaise in A-Flat Major, Op. 53 "Heroic": Maestoso - Pt. 4” by Frédéric Chopin,
registered on the CopyrightChains blockchain with CopyrightID
0x505f3fcc513f6c61218898dab421ab6e5abf7cf1782753a8e99b920de7130166 and independently timestamped
in Bitcoin block 960403 on 2026-07-31.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057900724.
Recording identifiers
- ISRC
- DEF057900724
- Title
- Polonaise in A-Flat Major, Op. 53 "Heroic": Maestoso - Pt. 4
- Artist
- Frédéric Chopin
- CopyrightID (CopyrightChains transaction hash)
0x505f3fcc513f6c61218898dab421ab6e5abf7cf1782753a8e99b920de7130166
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-31T13:04:34+00:00
- Bitcoin block
- 960403
- Canonical record hash
sha256:c4816fd56de20b4802c66ea3a3a75c4c073b27dc8c94d4d5b1112ba93a9b4880- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057900724
- Bitcoin block existence check
- https://blockstream.info/api/block/960403
Full record
Track page: Polonaise in A-Flat Major, Op. 53 "Heroic": Maestoso - Pt. 4 · Machine-readable JSON-LD