ISRC QZNWX2063955
Verified recording
QZNWX2063955 is “Heart On My Sleeve” by Mark Klaver,
registered on the CopyrightChains blockchain with CopyrightID
0x8823ddf0292bdb991f78321d5c2377c40e1409bf50b9ebf40fea3465543040c4 and independently timestamped
in Bitcoin block 960500 on 2026-08-01.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2063955.
Recording identifiers
- ISRC
- QZNWX2063955
- Title
- Heart On My Sleeve
- Artist
- Mark Klaver
- CopyrightID (CopyrightChains transaction hash)
0x8823ddf0292bdb991f78321d5c2377c40e1409bf50b9ebf40fea3465543040c4
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-08-01T03:13:03+00:00
- Bitcoin block
- 960500
- Canonical record hash
sha256:dca180ceda4cf24fc967dd3418a908c7052281694782921d8c4323c4b962ffa7- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2063955
- Bitcoin block existence check
- https://blockstream.info/api/block/960500