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 0xdc0a5dca30f2c0ee17de93621a3c420f8e7381fb5150f40b59c5439bc65483e2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79eb60b4-7e2a-40ac-97ff-c16d57c35327.json and https://artists.proofprofile.net/proofs/artist/79eb60b4-7e2a-40ac-97ff-c16d57c35327.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 0x55b843b814cdb43c100d0d8a7c19ad88a3fd6912a3bb7e58d2a8ddef3c3a8bcc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPCR09403760.
美川憲一全曲集～夜の花・さそり座の女～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5aa713cc14431610d0ad65e52cb7d6ac73135d31e38a34da7adabea8500756. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/JPCR09110040.
美川憲一全曲集 ～別れてあげる・さそり座の女～
これで良しとする／華散れど月は輝く
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c7612cdcc136d7c5ec2868112e7dd078249c4f365c344dff09ffb5a270238f. 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/JPCR02403410.
歌手生活60周年記念アルバム 「歌いつづけて」
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256d3d3da238f0de5c9b4e9f31577508151508b0a1b7dc1fee868833fe96c077. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/JPCR07250280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41629a69b3003e1e8e17c976749377e840ea8e928d8ec1260a26a09315d38c3. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:30:18Z), 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/JPCR02302980.
ベスト ～これで良しとする・柳ヶ瀬ブルース～