Captive or Captives may refer to: Arts, entertainment, and media Films Captive (1980 film), a sci-fi film, starring Cameron Mitchell and David Ladd Captive (1986 film), a British-French film starri
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 0x51f0ce2de00527d7d45684092cc198e9535bdb3f0b176bb1dcc71759d783e226. Chain 2 (Bitcoin): anchored in block 953980 (2026-06-16T17:16:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c9f0189-70b9-44fc-9ad2-399bab0cd2f4.json and https://artists.proofprofile.net/proofs/artist/2c9f0189-70b9-44fc-9ad2-399bab0cd2f4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).