A free warren—often simply warren—is a type of franchise or privilege conveyed by a sovereign in medieval England to an English subject, promising to hold them harmless for killing game of certain spe
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 0x0ebb23b970c153ce5c9ce64e8ccced49cdece1f703ba34df820afab3f0871961. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15f8d722-7995-40de-ab5e-d4fdd315a821.json and https://artists.proofprofile.net/proofs/artist/15f8d722-7995-40de-ab5e-d4fdd315a821.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).