In Greek mythology, Cassandra, also spelled Kassandra or Casandra, (; , , or referred to as Alexandra; )Lycophron, Alexandra 30; Pausanias, 3.19, 3.26. was a Trojan priestess dedicated to the god Apol
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0686836a7ad3801bace31d436f4fe2186dbe95f335c4c66a71e192d09e1ccb. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e154ec7-0c0a-4788-80e8-07a8900fd52d.json and https://artists.proofprofile.net/proofs/artist/0e154ec7-0c0a-4788-80e8-07a8900fd52d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).