ISRC USFI80200249
Verified recording
USFI80200249 is “Tighten Up” by The Mar-Keys,
registered on the CopyrightChains blockchain with CopyrightID
0x511e6a4b8e292bf38295850d1164715a3dc63c2ca6b1d76275293ef5d4f1cbec and independently timestamped
in Bitcoin block 960291 on 2026-07-30.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USFI80200249.
Recording identifiers
- ISRC
- USFI80200249
- Title
- Tighten Up
- Artist
- The Mar-Keys
- CopyrightID (CopyrightChains transaction hash)
0x511e6a4b8e292bf38295850d1164715a3dc63c2ca6b1d76275293ef5d4f1cbec
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-30T18:23:33+00:00
- Bitcoin block
- 960291
- Canonical record hash
sha256:3cd1d41c01d1c4581bc44aad62424f1c98c219c494013df2015a0dc07de2b800- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USFI80200249
- Bitcoin block existence check
- https://blockstream.info/api/block/960291