SEY or sey may refer to: Air Seychelles, ICAO airline code Secoya language, by ISO 639-3 code Seoni railway station, Madhya Pradesh, India, by Indian Railways station code Seychelles, IOC country
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 0x7f0be46e5680e5491b8bbaf1814ca1310edcc354d3638abc48ab6e9dfbb3e226. 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/bd28ecae-0b0e-4868-92b2-69ce56c16d2d.json and https://artists.proofprofile.net/proofs/artist/bd28ecae-0b0e-4868-92b2-69ce56c16d2d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).