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 0xe05b2f62100b30cbe2625fb7f932b7392f167f49401437ace732eeeb918d3c87. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/acccfaec-1b5b-47e6-b32c-0ac311db2845.json and https://artists.proofprofile.net/proofs/artist/acccfaec-1b5b-47e6-b32c-0ac311db2845.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Der Tag, an dem ich cool wurde 2. Die Nacht, in der ich supercool wurde
Der Tag, an dem ich cool wurde 3. Endlich richtig cool!