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 0xc8971947b2bbfbd15dc0336538c09458a02faee51e7e4ffe28ed33044ac8fc1b. Chain 2 (Bitcoin): anchored in block 953968 (2026-06-16T16:01:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/284a81ca-3b7b-41e2-89cb-0f427814aaad.json and https://artists.proofprofile.net/proofs/artist/284a81ca-3b7b-41e2-89cb-0f427814aaad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
It's almost time, a time again, a time to be
White noise, my blanket, my holy book, my labor pain
I inhale a wish and dandelion seeds are drawn to my lips
A strange wind tidies up my hair, makes me fall in love again