right|thumb|upright=1.3|Thor's Fight with the Giants (Tors strid med jättarna) by (1872). Thor (from ) is a prominent god in Germanic paganism. In Norse mythology, he is a hammer-wielding god associ
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 0xe869bbcf48e2da0f8e7904607358b6d1f779e95dcf517fbfb6ae200ef2f66a3e. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4544d52f-a806-4613-9702-2610f9e77cce.json and https://artists.proofprofile.net/proofs/artist/4544d52f-a806-4613-9702-2610f9e77cce.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).