thumb|The verse Domine, labia mea aperies et os meum annuntiabit laudem tuam is sung at the opening of the first canonical hour of the day Lauds are a canonical hour of the Divine office. In the Roman
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 0x1175e6fb68d420116fd2a20d7163c8e0c92fe4ce2dd435be694b09780388495a. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/887d9951-45ca-4b16-a2ff-6b6c4fef39a4.json and https://artists.proofprofile.net/proofs/artist/887d9951-45ca-4b16-a2ff-6b6c4fef39a4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).