Melk (; older spelling: ) is a city in the Austrian state of Lower Austria, next to the Wachau valley along the Danube. Melk has a population of 5,257 (as of 2012). It is best known as the site of a m
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 0x5909a76de528aa619b6dc9cc7e81c3f4b0f93150f456c41f642d0afa00a1a41a. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/154a871d-b701-4f60-94f3-68082542fbf8.json and https://artists.proofprofile.net/proofs/artist/154a871d-b701-4f60-94f3-68082542fbf8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).