A ( ; ; ; ; ) is a story, dialogue, question, or statement from Chinese Chan Buddhist lore, supplemented with commentaries, that is used in Chan, Zen, Seon and Thiền Buddhist practice in different w
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 0x42d359ac98f5db04d3f7f9a3c1c86cbdf6ec7cd239b0dc0166b682a8b9ac422b. 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/61248bc2-c3d8-47bd-85fb-7620d04a35bd.json and https://artists.proofprofile.net/proofs/artist/61248bc2-c3d8-47bd-85fb-7620d04a35bd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Retrospective Tapes: Crow Dancer (1993-1995 Selected Works)
Retrospective Tapes: Liquid Caleidoscope (Selected Works)