Lačni Franz (trans. Hungry Franz) was a Slovenian and Yugoslav rock band formed in Maribor in 1979. The band is widely considered one of the most prominent acts of the Yugoslav new wave scene, as well
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905b0fba0d58e146dcb0218bf824dcdd3e7e6b40b3e2c5e4476f8aae3655caa4. Chain 2 (Bitcoin): anchored in block 954134 (2026-06-17T19:41:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f2300cd-f56d-4398-a196-e5ac8ffd420c.json and https://artists.proofprofile.net/proofs/artist/7f2300cd-f56d-4398-a196-e5ac8ffd420c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).