thumb|Jesus in Limbo by Domenico Beccafumi The unofficial term Limbo (, referring to the edge of Hell) is the afterlife condition, in medieval Catholic theology, of those who die in original sin wit
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 0x5fc2af3d0fe04e36979a32c39df150c1db08820a7f859e192d74b9231b3709fd. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17712c83-8b03-4847-83c5-4121408456da.json and https://artists.proofprofile.net/proofs/artist/17712c83-8b03-4847-83c5-4121408456da.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).