Cyanna (siāna) was a rock band from Athens, Greece formed in 1999. The sound of the band was originally based on blending keyboards and electronic beats with guitars, influenced by both alternative ro
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 0x65f1702e387123a6ca1889a9e3cad661fae1726600032ed5adae84945db49582. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/baf32a13-47c1-479d-9bd3-cbe951e96aed.json and https://artists.proofprofile.net/proofs/artist/baf32a13-47c1-479d-9bd3-cbe951e96aed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).