ISRC NLA507820409
Verified recording
NLA507820409 is “Waltz No. 9 in A-Flat Major, Op. 69 No. 1 "Farewell"” by Frédéric Chopin,
registered on the CopyrightChains blockchain with CopyrightID
0x2b6a50d37da0db2e8aae7317cb955ff2bfac190c6a249954972856b8c8e10eb3 and independently timestamped
in Bitcoin block 960337 on 2026-07-31.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA507820409.
Recording identifiers
- ISRC
- NLA507820409
- Title
- Waltz No. 9 in A-Flat Major, Op. 69 No. 1 "Farewell"
- Artist
- Frédéric Chopin
- CopyrightID (CopyrightChains transaction hash)
0x2b6a50d37da0db2e8aae7317cb955ff2bfac190c6a249954972856b8c8e10eb3
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-31T02:51:48+00:00
- Bitcoin block
- 960337
- Canonical record hash
sha256:cfffd3550b5266277b535daf3fcc2d5ad2316e6cc54076bb5917e4241e70876e- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA507820409
- Bitcoin block existence check
- https://blockstream.info/api/block/960337
Full record
Track page: Waltz No. 9 in A-Flat Major, Op. 69 No. 1 "Farewell" · Machine-readable JSON-LD