JS or js may refer to: Computing JavaScript, a high-level, just-in-time compiled, object-oriented programming language JScript, Microsoft's dialect of the ECMAScript standard used in Internet Explo
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 0xb8f9c7b5e81077b1860d7ec28b0848d9ff1a7f07fb70151add99a82665338c29. Chain 2 (Bitcoin): anchored in block 953954 (2026-06-16T14:18:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/24ddbb8a-f923-42e2-92c5-a31439be799a.json and https://artists.proofprofile.net/proofs/artist/24ddbb8a-f923-42e2-92c5-a31439be799a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).