ISRC QZW9L2347821
Verified recording
QZW9L2347821 is “That’s Mathematics” by Tom Lehrer,
registered on the CopyrightChains blockchain with CopyrightID
0xacee463e61fb54253c6d99567efbb604b3694c4c4f17590d543e8554bef22f94 and independently timestamped
in Bitcoin block 960212 on 2026-07-30.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZW9L2347821.
Recording identifiers
- ISRC
- QZW9L2347821
- Title
- That’s Mathematics
- Artist
- Tom Lehrer
- CopyrightID (CopyrightChains transaction hash)
0xacee463e61fb54253c6d99567efbb604b3694c4c4f17590d543e8554bef22f94
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-30T05:43:45+00:00
- Bitcoin block
- 960212
- Canonical record hash
sha256:494ed29331ff37b4ab3a7fdb77a63bbaa7a4801f1455d3ede1ffc430cd609cc1- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZW9L2347821
- Bitcoin block existence check
- https://blockstream.info/api/block/960212