thumb|Aerial view, ca. 1985. thumb|Tower blocks at Bøler. They won the Sundt Price for architecture in 1956–57. Bøler () is a south-eastern suburb of Oslo, Norway. It is one of the more picturesque a
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 0x8cba54cf9a6bdfddd2c1fd4364120883e7dccc070e87b3501c1b72773a028372. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/078dcf49-2fe5-4877-b3eb-5d7e50790c80.json and https://artists.proofprofile.net/proofs/artist/078dcf49-2fe5-4877-b3eb-5d7e50790c80.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).