Framus Five is a Czech rock band founded in Prague in 1963 and led by singer and guitarist Michal Prokop. The band also includes guitarist Luboš Andršt and violinist Jan Hrubý. The group disbanded in
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 0xfb716273268846e3c2ca7b09326bec9bdfa103ec5047cebd2b719da2fa475911. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e163f0ba-799a-481b-8959-532e1b6d542e.json and https://artists.proofprofile.net/proofs/artist/e163f0ba-799a-481b-8959-532e1b6d542e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).