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 0x79d433ef93a584993db9f6a545e697a9a362ea6dd38a51f24a346ffe3385ea1e. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a92cfbb-3710-4cae-9ef5-8a1eb47a4862.json and https://artists.proofprofile.net/proofs/artist/1a92cfbb-3710-4cae-9ef5-8a1eb47a4862.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
This Is War 3 - Shadow Isles vs. The Void (Part one) [feat. AntiRivet, Blakinola, Nicki Taylor, Keyori & Rawb]