ISRC USB961331723
Verified recording
USB961331723 is “Sunrise Letter” by Stephen Sondheim,
registered on the CopyrightChains blockchain with CopyrightID
0x6b8b0db96bc1544785c4dcba967ae3f463c9046f4c8ca72bb70ba940cfea61e7 and independently timestamped
in Bitcoin block 960418 on 2026-07-31.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB961331723.
Recording identifiers
- ISRC
- USB961331723
- Title
- Sunrise Letter
- Artist
- Stephen Sondheim
- CopyrightID (CopyrightChains transaction hash)
0x6b8b0db96bc1544785c4dcba967ae3f463c9046f4c8ca72bb70ba940cfea61e7
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-31T15:20:15+00:00
- Bitcoin block
- 960418
- Canonical record hash
sha256:a788c28e5ba48beb586138f0feb8276b238f4bea90e7e44cfd5bcac91d6883e7- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB961331723
- Bitcoin block existence check
- https://blockstream.info/api/block/960418