250px|thumb|Illustration from the title page of Schlick's Spiegel der Orgelmacher und Organisten (1511), the first German treatise on organ building and performance Arnolt Schlick (July 18?,Keyl 1989,
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37294e82409c58240b94e4e59dbb566483fc86eb08ad3ff54264eb3c7127c022. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bec85cef-5c45-47e4-8997-da62fe525242.json and https://artists.proofprofile.net/proofs/artist/bec85cef-5c45-47e4-8997-da62fe525242.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).