Tamara may refer to: People Tamara (given name), including a list of people and fictional characters with the name Tamara (Spanish singer) (Tamara Macarena Valcárcel Serrano), Spanish singer Tam
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 0xfd2781e0d78497ebfe3f469b1e7201c340c1c441a6689c1a7ca117cd321bd2df. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79ffa8bc-b3ce-4f40-bf7b-1e270c49bc19.json and https://artists.proofprofile.net/proofs/artist/79ffa8bc-b3ce-4f40-bf7b-1e270c49bc19.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).