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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8ad53262014ffa3471dd98787bda9755788722b3f05374a68b70ca2acc35ff. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb82f759-27a3-48fa-bfbf-2430bb5209de.json and https://artists.proofprofile.net/proofs/artist/eb82f759-27a3-48fa-bfbf-2430bb5209de.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dream is stuck in my head (feat. HATSUNE MIKU & KAGAMINE RIN)
Uncalled (feat. KASANE TETO & HATSUNE MIKU)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea87b8e9219ed996202add55f8967ab2f9792b799206ad5edd39c621e4b70526. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:01:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPC2407836.
Placing a Bookmark on a Rainy Night (feat. Una Otomachi)
♡アグレッション (feat. 歌愛ユキ & 音街ウナ)
heartaggression (feat. Kaai Yuki & Una Otomachi)