thumb|upright|Japanese wood statue of Asaṅga from 1208 CE Asaṅga (Sanskrit: असंग, , ; Romaji: Mujaku) (fl. 4th century C.E.) was one of the most important spiritual figures of Mahayana Buddhism and th
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 0xae47dc2c45932bf3d8d61c5c424ba2864e3d126918aee53c3f31cf32e63c98cb. 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/dd4dde9a-0db4-4cc3-be8d-7dd706e221a9.json and https://artists.proofprofile.net/proofs/artist/dd4dde9a-0db4-4cc3-be8d-7dd706e221a9.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.