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 0xfadf246f780d6fff6f8f1141b484c8e8498ec5c318cc4c974c085603eb3617e2. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a70dfd4e-ef7c-4f2d-8b7a-23620dce9119.json and https://artists.proofprofile.net/proofs/artist/a70dfd4e-ef7c-4f2d-8b7a-23620dce9119.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x75c363e6ab877a451f1186648ef90aa0b77ff73d1630c55a5de5649284c57887. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPCO07106030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7198bfd2f974e53f5384b8608a666d819599709d684bee851dba24d172e1455. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/JPTE07090260.
SP原盤再録による東海林太郎ヒット・アルバム
栄光の唄声 東海林太郎 懐メロを唄う
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f9794a3c170f420715990a83a82727b38e650c3cb211e6b2acea7e4fc7a4e5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCJPM2053848.
日本の流行歌スターたち(50) 東海林太郎 名月赤城山～船頭小唄
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c9b7ee74db08fd5f89ab9db5f0d32118145396dcafaa183c21a44554e99d45. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPVI06601460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4c63515236736ec3e3303170a2996950027033bd00648ca1d676433e2583fb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPVI02102024.
赤城の子守唄（日本歌手協会設立記念録音）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574214acd145a97dd84855955c6d59d42f5bdb184ed977c6956175225c5e7b75. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPVI02102902.
東海林太郎 永遠の歌声(テイチク編)