thumb|255px|Alima The Alima River () is a tributary of the Congo River. It is formed by the confluence of two streams, the Lékéti and the Dziélé. Towns Towns on the banks of this river include (fro
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 0x6ffe6eaa5bbac5c9477bc79249fac7bd922a06511f00b0b3a901f3e09698c296. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ecca0c4b-005d-45dc-97b9-85652457393a.json and https://artists.proofprofile.net/proofs/artist/ecca0c4b-005d-45dc-97b9-85652457393a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).