thumb|350px|Lyrics in sheet music. This is a homorhythmic (i.e., hymn-style) arrangement of a traditional piece entitled "" (the original Latin lyrics to "O Come, All Ye Faithful") in standard two-sta
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 0x7875371bf6beb1c9cd05bed91b1b02b47834e3dc38ff98cd78bf4b082910f742. 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/50879f25-b364-43e8-8f67-577a221ca96e.json and https://artists.proofprofile.net/proofs/artist/50879f25-b364-43e8-8f67-577a221ca96e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).