ISRC USB961331707
Verified recording
USB961331707 is “Third Letter” by Stephen Sondheim,
registered on the CopyrightChains blockchain with CopyrightID
0xe74f17e46ccbb4d283896e170fa3a87cbb46855e978b37dbc14abd33f03bb2c4 and independently timestamped
in Bitcoin block 957118 on 2026-07-08.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB961331707.
Recording identifiers
- ISRC
- USB961331707
- Title
- Third Letter
- Artist
- Stephen Sondheim
- CopyrightID (CopyrightChains transaction hash)
0xe74f17e46ccbb4d283896e170fa3a87cbb46855e978b37dbc14abd33f03bb2c4
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-08T03:20:19+00:00
- Bitcoin block
- 957118
- Canonical record hash
sha256:8fb3dd38a268f64cac2077b8f6f08494d0c4f6152f2140cb67bbdda769aa5314- Verification API (seven-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB961331707
- Bitcoin block existence check
- https://blockstream.info/api/block/957118