is a Japanese musical group formed in 2006 especially to sing "Progress", the title song to the NHK program , known overseas as "The Professionals".https://www3.nhk.or.jp/nhkworld/en/tv/professionals
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 0xb815ba7c69da7046573d5b38f21fcadd272bf2933dd6caf3cd862a2800487955. Chain 2 (Bitcoin): anchored in block 953782 (2026-06-15T12:13:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d686eef2-2fb2-4b6b-9ca3-c8377ee2eda9.json and https://artists.proofprofile.net/proofs/artist/d686eef2-2fb2-4b6b-9ca3-c8377ee2eda9.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.