ISRC USUPK1921714
Verified recording
USUPK1921714 is “Letter To You” by CRUCIFIX,
registered on the CopyrightChains blockchain with CopyrightID
0xb4f63629bd4b4f4c608f6a1b0a4674677d94d880da8da14c537bfe8424e2941f 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/USUPK1921714.
Recording identifiers
- ISRC
- USUPK1921714
- Title
- Letter To You
- Artist
- CRUCIFIX
- CopyrightID (CopyrightChains transaction hash)
0xb4f63629bd4b4f4c608f6a1b0a4674677d94d880da8da14c537bfe8424e2941f
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-06-13T13:32:09+00:00
- Bitcoin block
- 953520
- Canonical record hash
sha256:91d2f5ac8b7b1907c76211e75aede6d81d99a0645bd0e881c2bdb55481c441de- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUPK1921714
- Bitcoin block existence check
- https://blockstream.info/api/block/953520