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 0x061942570880d17b3b12e1b143f77400c991dfd8c43a4894cd292ab3b63d96f0. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d105b650-512b-4a9c-9beb-b6f8b87caa01.json and https://artists.proofprofile.net/proofs/artist/d105b650-512b-4a9c-9beb-b6f8b87caa01.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Anti-Music & Untechno Vol 5271009 (Strange Electronic Experiments blending Darkwave, Industrial, Chaos, Ambient, Classical and Celtic Influences)