ISRC USUM71514605
Verified recording
USUM71514605 is “Bright Smile” by Kurt Cobain,
registered on the CopyrightChains blockchain with CopyrightID
0xbdfa433c4275d14f88df1099376521269ce913e5642b6f6d0c9632841cd138cb and independently timestamped
in Bitcoin block 953520 on 2026-06-13.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUM71514605.
Recording identifiers
- ISRC
- USUM71514605
- Title
- Bright Smile
- Artist
- Kurt Cobain
- CopyrightID (CopyrightChains transaction hash)
0xbdfa433c4275d14f88df1099376521269ce913e5642b6f6d0c9632841cd138cb
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-06-13T13:32:09+00:00
- Bitcoin block
- 953520
- Canonical record hash
sha256:2a5bdb2b57035771aec9c4b1394af7618bc02c641d8c62114400867a95825f29- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUM71514605
- Bitcoin block existence check
- https://blockstream.info/api/block/953520