Indrek Hirv (born 15 December 1956 in Kohila) is an Estonian poet, translator and artist. In 1981 he graduated from State Art Institute of the Estonian SSR, studied ceramics. In 1988 he established
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 0x0e1723f8e6797f087db2aab45cd850446fe42b4b38d2d3d09d9b4258b0da2541. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff8e348a-85e8-4cb7-9a63-4839fac1efb4.json and https://artists.proofprofile.net/proofs/artist/ff8e348a-85e8-4cb7-9a63-4839fac1efb4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).