ISRC USQX91903583
Verified recording
USQX91903583 is “12 Contretänze, WoO 14” by Ludwig van Beethoven,
registered on the CopyrightChains blockchain with CopyrightID
0x6f9590e4d506578d38b91b6f8ecaaccf502fef27ad441a70832d6a937609ce16 and independently timestamped
in Bitcoin block 960138 on 2026-07-29.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USQX91903583.
Recording identifiers
- ISRC
- USQX91903583
- Title
- 12 Contretänze, WoO 14
- Artist
- Ludwig van Beethoven
- CopyrightID (CopyrightChains transaction hash)
0x6f9590e4d506578d38b91b6f8ecaaccf502fef27ad441a70832d6a937609ce16
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-29T19:35:34+00:00
- Bitcoin block
- 960138
- Canonical record hash
sha256:9c33f69b6088d5d31687dd3f04b4b4877cfa0ff6e9c6bce798dcb804ca596c2c- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USQX91903583
- Bitcoin block existence check
- https://blockstream.info/api/block/960138
Full record
Track page: 12 Contretänze, WoO 14 · Machine-readable JSON-LD