GA, Ga, or ga may refer to: Organisations Businesses Garuda Indonesia (IATA airline code GA) General Assembly, a digital and technology training company General Atlantic, a private equity company
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 0xe1638881511515f04af827ee9b92e431584d1c884bf354d26fad98d740138aee. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdaf4a6e-d5e5-4d30-810f-0d93c802dd0c.json and https://artists.proofprofile.net/proofs/artist/cdaf4a6e-d5e5-4d30-810f-0d93c802dd0c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).