thumb|right|260px|Pinnacles, studded with crockets, on King's College Chapel, Cambridge. A pinnacle is an architectural element originally forming the cap or crown of a buttress or small turret, but
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b8d4f3397342db112f96fc04cacc73afc837cbb7196d3c0e7000b38f9b3281. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6663724e-0c43-4258-bff5-9c25f83f745a.json and https://artists.proofprofile.net/proofs/artist/6663724e-0c43-4258-bff5-9c25f83f745a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).