thumb|Birch bark being used as tinder in a campfire Tinder is easily combustible material used to start a fire. Tinder is a finely divided, open material which will begin to glow under a shower of spa
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 0xcbfa7d799d1df53f3adf13b41578ec22a0d18e940952916bc8ff78f76c42f88e. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb39a3ac-5b57-4391-96ec-3bf4e8a14326.json and https://artists.proofprofile.net/proofs/artist/fb39a3ac-5b57-4391-96ec-3bf4e8a14326.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Didn’t Know I Had A Heart Until You Broke It