Krzyki (; ) is a former borough of Wrocław, Poland located in the southern part of the city. On March 21, 1991, the newly created City Office of Wrocław assumed many of the functions previously carr
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 0x622af6980a5490df8350b5f215e17dd5da230e892c0ab9f69cbfde19b48634f5. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4efbf9e-99c4-4e87-bcc9-375496d2cc86.json and https://artists.proofprofile.net/proofs/artist/b4efbf9e-99c4-4e87-bcc9-375496d2cc86.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).