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 0x22d3a44f2c6f6b5382b792817071ef1fa37106d3c3c1a910b80bf394cea857c2. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6dd3f73-bfdb-4bc3-ab21-698902d9b663.json and https://artists.proofprofile.net/proofs/artist/c6dd3f73-bfdb-4bc3-ab21-698902d9b663.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Songs Undesirable Vol. 1 (Don't Run Away)
Songs Undesirable, Vol. 2 (Sin and Shame)
Songs Undesirable, Vol. 4 (665 Lesser Evil Charm)
Songs Undesirable, Vol. 6 (Tree of Happiness)
Songs Undesirable, Vol. 9 (Time For Changes)