ISRC PLB381300252
Verified recording
PLB381300252 is “Trudny Rachunek” by Witold Lutosławski,
registered on the CopyrightChains blockchain with CopyrightID
0xc6e9b9e9a3d025e022db4bd45d0420d779f14b1629d4abd84c0d2aa67fdbfcdd and independently timestamped
in Bitcoin block 960321 on 2026-07-30.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLB381300252.
Recording identifiers
- ISRC
- PLB381300252
- Title
- Trudny Rachunek
- Artist
- Witold Lutosławski
- CopyrightID (CopyrightChains transaction hash)
0xc6e9b9e9a3d025e022db4bd45d0420d779f14b1629d4abd84c0d2aa67fdbfcdd
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-30T22:27:30+00:00
- Bitcoin block
- 960321
- Canonical record hash
sha256:9f2b07dfe637bb44fb811a3e0eed167be12529ea54ad6ee6f9cc2e361d150d58- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLB381300252
- Bitcoin block existence check
- https://blockstream.info/api/block/960321