ISRC PLB381300254
Verified recording
PLB381300254 is “Kotek” by Witold Lutosławski,
registered on the CopyrightChains blockchain with CopyrightID
0xd56b4de7119b4d7e091b840f7a88262cd3ddf8a9a2ca8a6e1b33f9d74442ba13 and independently timestamped
in Bitcoin block 956889 on 2026-07-06.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLB381300254.
Recording identifiers
- ISRC
- PLB381300254
- Title
- Kotek
- Artist
- Witold Lutosławski
- CopyrightID (CopyrightChains transaction hash)
0xd56b4de7119b4d7e091b840f7a88262cd3ddf8a9a2ca8a6e1b33f9d74442ba13
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-06T06:56:49+00:00
- Bitcoin block
- 956889
- Canonical record hash
sha256:12f0b2457a77ddb931e8c7c71378641c63a395c34099d776fa63d601e8d2235b- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLB381300254
- Bitcoin block existence check
- https://blockstream.info/api/block/956889