thumb|Line drawing of an Almaz space station thumb|Almaz space station at VDNKh (Russia) The Almaz () program was a highly secret Soviet military space station program, begun in the early 1960s. Thre
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 0xe7bd1329fe90dac52c3a2fba7aa1d195f37910f2f15c1e2697ca97e759f64e6b. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/928974b0-f0c7-4363-97af-5a2ab66bee53.json and https://artists.proofprofile.net/proofs/artist/928974b0-f0c7-4363-97af-5a2ab66bee53.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).