The Jurassic ( ) is a geologic period and stratigraphic system that spanned from the end of the Triassic Period Ma (million years ago) to the beginning of the Cretaceous Period, 143.1 Ma. The Jurassi
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 0x3494f171fd67789f43e195c664b0d61b6be34f716207364e76e0c333a6494b53. Chain 2 (Bitcoin): anchored in block 953864 (2026-06-16T00:30:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03bd0b3b-4ff3-40b7-9150-6104638f07c2.json and https://artists.proofprofile.net/proofs/artist/03bd0b3b-4ff3-40b7-9150-6104638f07c2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).