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 0x590db8efcef4817e077947e7886df7b974ee679ce083009a5919283018984356. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e6c202a-63de-4bcd-9704-6cf0640ff8f1.json and https://artists.proofprofile.net/proofs/artist/7e6c202a-63de-4bcd-9704-6cf0640ff8f1.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 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 0x4c2c3367a599c7f3cd22aa7e7d7dd5791a0fb53436e9cb868197816fe846cb51. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QMBZ92250044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850a836fd3f940c238143a177b48f26ef43f24f8b647585f92f35a5bf01cc7a8. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QMBZ92250054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2c3367a599c7f3cd22aa7e7d7dd5791a0fb53436e9cb868197816fe846cb51. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QMBZ92250044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf047db47f757f730976e7ccb581af27c3e4c8ad973a07e1a488a9795190a691e. 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/QMBZ92250056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1cc76c65292a3c7f89311bda7215e6b1e35d13d72884fc9a76b8cf5b05f4ac. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/JPTF01308602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6cc91c21452780298ca1e8188f5aedcf8be9a659bc47e253f42241a27a21a4. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/JPTF01211902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165843446ff55bbece3eb96af44e310a6654eab2af95b8d3ca6b8ab384180087. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPTF01410003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56389f24eab1dddb2cda34873ab85bf46b5c9c73dacfb629115c8f0104319587. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPTF01410007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46a6c8d555684467b619fdfca703972935d3ebe81c65524cdfc80119ada7ccd. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/JPTF01410008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a21bbedd9b8e2228a48b1eee6ec2c6dbd1ecca2e1c8b3adccd2385bc9f3b25. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/JPTF01410009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7e157e93b66e47d29bff94663bda9dfae23fbc41adadaa89f4fb5973fd8b8f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPTF01507401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b1b490ac820bc2b9b1fba166f280a25afb5a4d5fc96cb18a2d932628a1eac0. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/JPTF01512702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24685a9fc326d1b6486a27807079dbfa3dcc169521d75c631f831edb9ec5e8d4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPTF01512703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6be9ecfbf2ad4958a54a5e630cc4656c2b03d688193728309b71e0fd0cbfb72. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/JPTF01512704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5653c2f064004037063d49ea45e4b1d2b87a0c2f72c0af87854460a84dc78ca5. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/JPTF01512706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cc6e9870b11a17a9ffc4cd310adad84013dca535eded01574505b378ba2df5. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/JPTF01607001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6cc91c21452780298ca1e8188f5aedcf8be9a659bc47e253f42241a27a21a4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPTF01211902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24685a9fc326d1b6486a27807079dbfa3dcc169521d75c631f831edb9ec5e8d4. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/JPTF01512703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175ee93776763e2e88dc7308e4d5e165bf64d331dac620969254f03ee87d9e1a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPTF01308611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1cc76c65292a3c7f89311bda7215e6b1e35d13d72884fc9a76b8cf5b05f4ac. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/JPTF01308602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46a6c8d555684467b619fdfca703972935d3ebe81c65524cdfc80119ada7ccd. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/JPTF01410008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd081ebadd9c3c61523372d4de203703715f6de431efb419a0fd9825337976e. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/JPTF01606905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52cb92aaeb73d3f0637640725d3dd6145709a5681b92350ae182d90d7579475. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/JPTF01606907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c55ef5c0e14885990162fc832923ddf78a5d708ad8886d76284df3a0462079. 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/JPTF01606909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e99b0913d8e833b1203d331606faaeed74328cd8e5a12900137df0542071570. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/JPTF01512709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6f5939ba823d436fc0f705e7a7d516d8546a278404c80a277cc6304a592b72. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPTF01606910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f16fb538176dbfdecf0053ba9ffc3b7a85fc6acf750efafb0a82566f005f82. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPTF01709901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4875b71af1da2931f1290dcc206997d95c47421d5602c8eabe50aab20ab334. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/JPTF01709902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3697e13c28d9242f196ff30088b6626c1bcf533bce6d0420d3de7b70e089718b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPTF01709903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cf98ec5d5468046cc5d8c3b93fa5cb5b4859e2d17cd58371da0ccc4f855060. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/JPTF01709907.
ワールドワイドフェスティバル feat. 初音ミク・鏡音リン・巡音ルカ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32d773303b70a000eb99f7a78aede726c91bc3a0b867f60070736323729226e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPTF01910407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9995780388887576e73458362dc43fd2e4ab4d768bd1d13f9ef57decf1c414. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/JPTF01910408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe533aca318071a57531596f99e8c9916cc560929b641acbc27e243a4c3ef4a81. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPTF01914001.
Twinkle Starry Night(テレビ朝日系「お願い!ランキング」9月度OPテーマ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8d63020a8fc11b2fc1af55fb543b439c62492bde6c03f13059a9cb6efc32c9. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/JPTF02217104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91687e4e2de07ed86acce909b677229cd0ebfd8343208645857683dd94824266. 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/JPTF02217107.
Lighting the Future (feat. HATSUNE MIKU)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bfde9b26bc79a12e7ea5bb006df0eb1d0cd71772dd35d0ab5b43a5b95bceb3. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QT66J2582675.
Exit Tunes Presents Entrance Dream Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1c81838cbcc5819580ad493fb25d277caf88e6440d5ca7ec75b8b8fc7b947d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPC231500670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3babf32cfe2d5659c68ad63c4902f15d37ba42e13a5c343de191bc950b1904b1. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/JPU902302093.