thumb|The Last Judgment (detail), c.1431, by Fra Angelico depicting people being tormented in hell In religion and folklore, hell is a location or state in the afterlife in which souls are subjected t
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 0xf51e28b7fe5f5ca2d78aac4cd68b4d9397b02db87f8aed78de9baf7e5ea9b4ad. Chain 2 (Bitcoin): anchored in block 953982 (2026-06-16T17:42:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2bed6f72-ec83-4858-a6b0-58578b471860.json and https://artists.proofprofile.net/proofs/artist/2bed6f72-ec83-4858-a6b0-58578b471860.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).