Taktici is a Slovak music group, established in 1977. In 1979 they defected to the US and in 1982 they went their separate ways. History Taktici started their musical career in Bratislava's famous
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 0xaa9b1940deef163505a3859d6a276526086202a9796be1f928008534ca2b6748. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6c28b33-885d-47ee-9b8d-8a2c98b6649c.json and https://artists.proofprofile.net/proofs/artist/c6c28b33-885d-47ee-9b8d-8a2c98b6649c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).