Cypher may refer to: Arts and entertainment Cypher (French Group), a Goa trance music group Cypher (band), an Australian instrumental band Cypher (film), a 2002 film Cypher (...And Oceans album)
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 0x1817f92099282ee2e0d8cf59eeafaa8fbf8dc5a8163ebe8c69a62f701d4382c5. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c4c98e2-3bf1-4149-9e00-82d98d8160d5.json and https://artists.proofprofile.net/proofs/artist/4c4c98e2-3bf1-4149-9e00-82d98d8160d5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).