Fink may refer to: People and fictional characters Fink (surname), a list of people and fictional characters Fink (singer), English singer and songwriter Fin Greenall (born 1972) Billie Joe Arms
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 0x7aac3ac2444b4aa3314b046eb6e009820eb6f439bc5a627b2a7a3b785ded6e21. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/351a2a5e-b851-4d24-80f8-794979fa5557.json and https://artists.proofprofile.net/proofs/artist/351a2a5e-b851-4d24-80f8-794979fa5557.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).