Stamp or Stamps or Stamping may refer to: Official documents and related impressions Postage stamp, used to indicate prepayment of fees for public mail Ration stamp, indicating the right to ratione
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 0x08617a2b1774a071b9b049d020b58e982048d920f7fceb03455d2c187bac99f9. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/523e7772-7465-43af-b2b0-97c0701fb608.json and https://artists.proofprofile.net/proofs/artist/523e7772-7465-43af-b2b0-97c0701fb608.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).