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 0x4421e37d70bafa8b30522f37e306ff73750a32bfe7d4fb2c7cc8a5bf3a089998. 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/fa31526b-5d1e-4ed9-85db-ea592f7f74a8.json and https://artists.proofprofile.net/proofs/artist/fa31526b-5d1e-4ed9-85db-ea592f7f74a8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
কিংবদন্তি শিল্পী আব্দুল আলিম পল্লীগীতি, Vol. 3