thumb|Maria Wiik, Ballad (1898) A ballad is a form of verse, often a narrative set to music. Ballads were particularly characteristic of the popular poetry and song of England, Ireland and Scotland f
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 0x945ecad3f7c02cb2ca486f31cea9c3f4cdf6d42d497551c9ccaea0a7d7180d87. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b1c29ed-c1c7-4912-8138-fbb82f0ca0eb.json and https://artists.proofprofile.net/proofs/artist/9b1c29ed-c1c7-4912-8138-fbb82f0ca0eb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).