V3 or V03 may refer to: Medicine Mandibular nerve (V3), division of the trigeminal nerve ATC code V03, a subgroup of the Anatomical Therapeutic Chemical Classification System Area V3 of the visua
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 0x921c2a7da0cc008186b6ba815c25bce8b23118c66ffa65d8a40c7e22123b59f5. 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/540fed49-4d1b-4770-9285-c56d7569d4f3.json and https://artists.proofprofile.net/proofs/artist/540fed49-4d1b-4770-9285-c56d7569d4f3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).