alt=Refer to caption|upright=1.2|thumb|An illustration of Agartha within the hollow Earth, from Walter Siegmeister's 1960 book Agharta Agartha (variously spelled as Agharta, Aghartta, Agharti, among m
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 0x4eabc2c887e90ab91a767fb119c6428126daed68b2ea3fe869b027331a253a5d. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/103a6262-37ca-4bf2-9d23-c99b5271c85f.json and https://artists.proofprofile.net/proofs/artist/103a6262-37ca-4bf2-9d23-c99b5271c85f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).