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 0xb766fc4c479ab1e81063dad92fdae8aaad3c84ab90a8b169eec2ef909cebbf25. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/196841fa-19f0-44af-981f-af6a029a787a.json and https://artists.proofprofile.net/proofs/artist/196841fa-19f0-44af-981f-af6a029a787a.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 0x2570502461039e9ef09285d3ed03defb98b51b5856187166e312ba7007dd9eab. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPSR07510020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ef8f05293ad3b4f3507e0d65578247b01ac97bdb90f4570430b2cbc678be9d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/JPSR07522740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e4ef7be4627b01bbad9de7bebb465e455d90a9bc33b4481b7134d0aae329a4. 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/JPSR07522790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73370b02a60459b083e16e8712ffc4e948359c89fd492f4a4e1c3c0043ef41bf. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:14:04Z), 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/JPSR07522800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a36435598d2e5c4379d65c280e8e9a23a8bccf35971e6943a19af6288e26045. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:22:40Z), 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/JPSR07522830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19daf15f91e2f59e5d55d736c70df66350b1995760143e50196c3bdbf024b787. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:53:09Z), 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/JPSR07617420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e34fde1e057276ad1e8cfa99909da85987e7f811ac90ba2a770364478c1e72f. 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/JPSR07617430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3892024b1db38c436e47791793bf7b07f16c9dbcd1489141f85ef848b42ae0d8. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/JPSR07617440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fd1d0e462849b87c4200751fbd637375869e259c5b5e37955ddefe94010235. 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/JPSR07617500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78b343c6ae106133295b2e76352e97e810379f0f2b0fe8cbf685cb59d9ecb6c. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:49:01Z), 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/JPSR07617530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe609053d1d1a3cf264f31d69b63018f08f7f79df0ea0a7654db5144e59c7a7cb. 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/JPSR07606380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2da1f05237e1d1bb45b00948e3ffd39ce7f087c9785dbff4ac3bd8903f96ee. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPSR07606400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f59c44fc7e7db4b1cee63d48381813fbb92e32ac14454307370a10f6e7c22c. 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/JPSR07606420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd72ddea90dd0a237f5ce648d57f616c616300f81b74e98f93708d31e422f61. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/JPSR07708260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf59671fcfd9ecd39779a1dd147fbb0853f932b11f6d047448530b90d01f550. 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/JPSR07708270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315e12737e5672916585483270855f42c5f6cd2323a655d180d3ec38b995aa1f. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/JPSR07708300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6ecafeaafbea2c082b4c36a4adb61a2695abd4a4bb0bcac6a4b363568f2287. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/JPSR07800420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3b62adc121c5d24f7f978305aeb1495a0927dd0e4c1baa025be3f9c6f37d3d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/JPSR07812420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80502dd6b45b5d8525fe26aac5045fd893bfbbea1a38146a00e1531fd4796051. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/JPSR07926790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552c32053a1bf37d77d7c9016a3f8b7e66660e20c664af1358fd69db38d928a0. 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/JPSR08019430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad5498613be0a6abade7810efb785a5048a9c8deeab86bdb2a20dccd3b88a61. 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/JPSR08119290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa339620bdf5a5be6abccc8f2eef7e00943272261f1e0eca326cb510d984c9923. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:25:58Z), 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/JPSR07501100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8b119a80ab967a09737f453a550e0fd265cb2d56835a9e82cb1afca9c9b182. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:26:02Z), 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/JPSR07511760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3972612a9a86ab9e203485162f7a7ee1d6ea944661193a82b9f432acf05eb5e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/JPSR07611270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147f007c76d1d299216979f0247fd8257c80e91e448ddab8ecc8f50f0ef7db15. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/JPSR07706670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0645afe59beaee182ce7f4a9a2c26ea4de125732372d3f6a63e53026ba3d7b8. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/JPSR07802120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40aa1c0c193fe1aed262a273de4721d3dbfceb233f155fa70961eeca1cc4222c. 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/JPSR07810310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746ecbaa4fddb68644bb1b548883688ac9b47d90394473932a303c5b5bf2f110. 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/JPSR07906440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b43c711b569ebd6de9778b1ff2e6e898cae18d953f8cdb90a0714ff960b30d3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:33:13Z), 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/JPSR07914540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877e6f9eafb2c35789424f30c3927f44b418d517eabcace08b0724ae9a4a12d8. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/JPSR08111740.
GOLDEN☆BEST / 太田裕美 どんじゃらほい～童謡コレクション
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2d6ae398d2be00f51fb9294a30aac76166b4002c404f469bec5753535d18c9. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:03:49Z), 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/JPES09200650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f84566bb503a4a95ecd4176ab9ba8572358032feea9306be69905ae1803630. 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/JPES09200880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9e3ecef149ca94d0ebde878cd13ba3aca866571ab2b211cb9a92b647aa9c9f. 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/JPES09200890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e80c573142d05899326baefdb5bb96c7dab712c5fd99cecc950903f318d8ea. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/JPES09200960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b2d135988e9827b624ce31e41722a10399c95a3869138e27b37e3c1afcce68. 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/JPES09200780.
さらばシベリア鉄道 ピアノクインテット
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7447b052bb74eeacb20ca589f99310e1796215c706b70a97503ab46aca95318. 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/JPP401900210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39f63499375deb5b420b6eabe0e881a5d5a21b8711260aaf120a1aec6f3da88. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPPO00868140.
木綿のハンカチーフ - オリジナル・カラオケ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e56e70ced0f641d5cf769330bf3dc676d998326491f806a5cf468594bf5e6c1. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/JPPO00873030.
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