John Blund () was an English scholastic philosopher, known for his work on the nature of the soul, the Tractatus de anima, one of the first works of western philosophy to make use of the recently tran
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb902f690495291b84db3cea5086db2fabce7e70cc5dffedf05bb4caee384b0b. 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/1a650b3d-1947-401f-b31d-a824c719c4cf.json and https://artists.proofprofile.net/proofs/artist/1a650b3d-1947-401f-b31d-a824c719c4cf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).