Again may refer to: Entertainment Again (video game), a 2009 adventure game for the Nintendo DS Again!! manga Again!, a 2011 children's book by Emily Gravett Again (film), a 2015 Japanese film M
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 0xe5fddc035bee4dbef6453c6304e10b8bd94358996bba411c82d66104bb11f54a. Chain 2 (Bitcoin): anchored in block 953860 (2026-06-15T23:55:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03b08407-c8a1-4be9-8ccb-d0d92602d8ac.json and https://artists.proofprofile.net/proofs/artist/03b08407-c8a1-4be9-8ccb-d0d92602d8ac.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).