thumb|Salón Verde ("Green Hall"), a green room at the Teatro Real in Madrid, Spain. The chairs, curtains and walls are predominantly green. In show business, the green room is the space in a theatre,
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 0xa97d498a4c89f4e241232c888bd938b357144465b32622b43eb84830b5abe76d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf61e584-a086-4606-af42-08d2e22c2c54.json and https://artists.proofprofile.net/proofs/artist/cf61e584-a086-4606-af42-08d2e22c2c54.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).