ISRC DEF057900720
Verified recording
DEF057900720 is “Polonaise No. 6 in A-Flat Major, Op. 53 "Heroic": Maestoso” by Frédéric Chopin,
registered on the CopyrightChains blockchain with CopyrightID
0x914f2074b73d1eb4b3e9d1d7640c94cfe231274ef308a355f72aafa6543f3baf and independently timestamped
in Bitcoin block 960220 on 2026-07-30.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057900720.
Recording identifiers
- ISRC
- DEF057900720
- Title
- Polonaise No. 6 in A-Flat Major, Op. 53 "Heroic": Maestoso
- Artist
- Frédéric Chopin
- CopyrightID (CopyrightChains transaction hash)
0x914f2074b73d1eb4b3e9d1d7640c94cfe231274ef308a355f72aafa6543f3baf
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-30T07:28:30+00:00
- Bitcoin block
- 960220
- Canonical record hash
sha256:d4939800b277e10a53593bd51647c3fa37139b9812db43019c41f24b5711cc32- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057900720
- Bitcoin block existence check
- https://blockstream.info/api/block/960220
Full record
Track page: Polonaise No. 6 in A-Flat Major, Op. 53 "Heroic": Maestoso · Machine-readable JSON-LD