ISRC ES31E2303400
Verified recording
ES31E2303400 is “Lobachevsky” by Tom Lehrer,
registered on the CopyrightChains blockchain with CopyrightID
0xd24f60b72ca1ecef9baaaf3e8eceeea46c04d91f2f86f45b6f9b8e1a86550f8a and independently timestamped
in Bitcoin block 960404 on 2026-07-31.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES31E2303400.
Recording identifiers
- ISRC
- ES31E2303400
- Title
- Lobachevsky
- Artist
- Tom Lehrer
- CopyrightID (CopyrightChains transaction hash)
0xd24f60b72ca1ecef9baaaf3e8eceeea46c04d91f2f86f45b6f9b8e1a86550f8a
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-31T13:06:57+00:00
- Bitcoin block
- 960404
- Canonical record hash
sha256:0e70c3a5af73e717b1b6ec6b5ffa2ece6530ba48c0c3ba5cca369ac025b7691e- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES31E2303400
- Bitcoin block existence check
- https://blockstream.info/api/block/960404