Collin may refer to: People Surname Collin (surname) Jacques Collin de Plancy (1793–1881), French occultist, demonologist and writer Victor Collin de Plancy (1853–1924), French diplomat, bibliophile
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 0x33390836fe793327813f02636bc57bb44e333de69d3e5db77050dbb83ad76dcb. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3515ba3e-9378-4298-83ad-799a690d8550.json and https://artists.proofprofile.net/proofs/artist/3515ba3e-9378-4298-83ad-799a690d8550.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).