ISRC DEF057900722
Verified recording
DEF057900722 is “Polonaise in A-Flat Major, Op. 53 "Heroic": Maestoso - Pt. 2” by Frédéric Chopin,
registered on the CopyrightChains blockchain with CopyrightID
0x8cfc64c1e9f4414990ddb36d0656dd4b8a282eedae927e83d80c1370736ae89d 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/DEF057900722.
Recording identifiers
- ISRC
- DEF057900722
- Title
- Polonaise in A-Flat Major, Op. 53 "Heroic": Maestoso - Pt. 2
- Artist
- Frédéric Chopin
- CopyrightID (CopyrightChains transaction hash)
0x8cfc64c1e9f4414990ddb36d0656dd4b8a282eedae927e83d80c1370736ae89d
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-08T03:20:19+00:00
- Bitcoin block
- 957118
- Canonical record hash
sha256:770370757cf2cc4fdb469184c977ff6859c1e451603e6fc3abeee87554e140ed- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057900722
- Bitcoin block existence check
- https://blockstream.info/api/block/957118
Full record
Track page: Polonaise in A-Flat Major, Op. 53 "Heroic": Maestoso - Pt. 2 · Machine-readable JSON-LD