thumb|Illustration depicting otherworld in Celtic mythology by Stephen Reid in T. W. Rolleston's The High Deeds of Finn (1910). In historical Indo-European religion, the concept of an otherworld, also
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 0xffa4582e90d4b7c05f79bc17d1f1633bfc4e61f733eadc06bee418c655a70404. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d79c159b-0d34-4f57-baaf-62c38cd738d0.json and https://artists.proofprofile.net/proofs/artist/d79c159b-0d34-4f57-baaf-62c38cd738d0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).