thumb|Military insignia of the Spanish Army's Captain General An insignia () is a sign or mark distinguishing a group, grade, rank, or function. It can be a symbol of personal power or that of an off
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 0xf62a7f399a2cb967b21770c6a4912465c40c0acb055bdf80c7f84fb11751a5bc. 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/3b395e4c-aeae-4a9c-a64c-7b1ff3c455db.json and https://artists.proofprofile.net/proofs/artist/3b395e4c-aeae-4a9c-a64c-7b1ff3c455db.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).