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 0xa1c2bab8e71510d5d614f7e4359b8d60a06097cd44f449e712693e6c8c1d3ba0. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8bf0256d-0a4b-4b12-9bc5-45371f6de266.json and https://artists.proofprofile.net/proofs/artist/8bf0256d-0a4b-4b12-9bc5-45371f6de266.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
10 Anime Songs Everybody Should Sing, Vol. 2 (Karaoke With Melody)
10 Anime Songs Everybody Should Sing, Vol. 1 (Karaoke With Melody)
10 Hits Everybody Should Sing (International Bests)
10 Anime Songs Everybody Should Sing, Vol. 4 (Karaoke With Melody)
10 Anime Songs Everybody Should Sing, Vol. 3 (Karaoke With Melody)
10 Anime Songs Everybody Should Sing, Vol. 5 (Karaoke Version)
10 Anime Songs Everybody Should Sing, Vol. 6 (Karaoke Version)
Kotoba – Words (From Bokura Ga Ita) - Originally Performed By Izumi Kato
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 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 0x2365f560958a1d4101fcec9657ab731670a4f838e59e945334b5c95493db48d3. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:10:22Z), 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/DEY340402275.
10 Anime Songs everybody should sing, Vol.7 (Karaoke with Melody)
10 Anime Songs Everybody Should Sing, Vol. 8 (Karaoke with Melody)
10 Anime Songs Everybody Should Sing, Vol. 9 (Karaoke With Melody)
10 Anime Songs Everybody Should Sing, Vol.10 (Songs from One Piece)
10 Anime Songs, Everybody Should Sing, Vol. 11 (Songs from "One Piece")
10 Anime Songs, Everybody Should Sing, Vol. 12 (Kraoke with Melody)
10 Anime Songs, Everybody Should Sing, Vol. 13 (Kraoke with Melody)
10 Anime Songs, Everybody Should Sing, Vol. 14 (Karaoke with Melody)
10 Anime Songs, Everybody Should Sing, Vol. 15 (Karaoke with Melody)