GOCA can refer to the following: Gallery of Contemporary Art is the name of multiple fine art galleries Georgia Ovarian Cancer Alliance, an Atlanta-based group promoting Ovarian cancer awareness
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 0x3da0cf4c5b26eb2a9ac78770671ace2811465bc00dfac4364f81ddaf0ad25f87. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8112ab6-29d0-46e2-81ad-296db2095bf1.json and https://artists.proofprofile.net/proofs/artist/b8112ab6-29d0-46e2-81ad-296db2095bf1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).