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 0x2c2358bc11383370702f664eacdf189cdaa5a5ac637ebc41cc1eb36d05c7aed3. Chain 2 (Bitcoin): anchored in block 953896 (2026-06-16T06:05:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/100ec7de-da11-429c-8e5d-d5466f7f9cbd.json and https://artists.proofprofile.net/proofs/artist/100ec7de-da11-429c-8e5d-d5466f7f9cbd.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 0x0c1fd96ed195b56a646d875cf8fd4936110237bab75ace8d4cfc495268530f15. 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/JPVI00212000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26e2eb36299cf32c71ab08b3ecd53af3c1b3542fb7281c455f3edb8dff41f30. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/JPVI00212100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7f0d6602dceefd34dc3657d69a15e24e7dcb8ee56621a866d2489a172fd02a. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/JPVI00212010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa746a06dfeb59a044f2cbfb7f91de7c6fd38d43dc193a8b433f0aec7f2b931a2. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/JPVI00212110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982b6ae3ac6144cae39da2f989f0e27002c084c4aa16333d262dcec3303ad0b2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPVI00212020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f58c79f791ce3de650d0f405915801f55fc1b5d65f2b936369204d9445dda29. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/JPVI00212120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8af22eecad7b5321d383b2d6d39568b33194a41ea3f3033b27755bd6fadd0ac. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPVI00212030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138dbf499fac8bbd337f32f32627d190be53d9f6e17803ec1ae1d361d94a3bb3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPVI00212130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce1fa4d96798dd84357eb1608a0b771366abeab34701b08c05e3958e72554b7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPVI00212040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6bc7628c33fd6c739cd32377408e2fea137a6c0189bc8233c3c6ad7d85adc8. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPVI00212140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7d64804fa5194c2a120885369a056af6b2395cdea10b48b5cd1b89977f1b42. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/JPVI00212050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2ed2cef2f87220110c06b820e300df9bfafa57446b421d2355402758ea2b95. 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/JPVI00212150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3e680165ae9c8953be66e9c6c6a9c75cde886ba45a0f87772ab4e1dc6fea7c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPVI00212060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9c0b808ab9f732c27c9ab9e63c8acec6da63c99324b01f06519ee0b54786aa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPVI00212160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edf0eb0de8dfe2e41307a06255a0d63362e8936c47fa07e14dfeee93705d959. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPVI00212070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb640386fd9d423b80db86ed67845a57b44c238ffa1621de575aa880abc3c60. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/JPVI00212170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7148780efa5496618f885a64a08df8dd38ffbddba93952489b99e82c639e173d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPVI00212080.
さよならアメリカ さよならニッポン
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f501591a3980323a8a3b3070f20e8c99b704e1c5b4cd8299f5b5fdb366d1e7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPVI00212180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4f7923bc36eddaa910e14d7cd42c76f08f681c18f5c70d6c439b21ada5536c. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/JPVI00212090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05def522535789feb90420b6536371c8ac43641ebd89c7e34a49886987779a7f. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/JPVI00212190.
All kinds of People ～love Burt Bacharach～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad8bbfc3ce5a8e8bd94f8ef254daa399f476927be45fd98f602e4335d5e08d0. 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/JPJ900919120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff9e74945f5a6e04f1523b6861877334b03f0d221af207dfb764d6dfb4a7466. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPJ900919130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7a9174d118f40af0194c98bc1db436113e51b645d19f08c47b3755d10b26e9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPJ900919140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11ab676d741301bba2b3eb8daada106ee7c839d1353d54efaccb1d3ea4a7c61. 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/JPJ900919150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadb0832510c7870be1cf3aff1ed2b951ff050d0f1a48758b9e82431b1dde2da. 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/JPJ900919160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e58534538fa8aa904f83948ad0352b8c1937f3935d8dbbbb4f733c1e831b5e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPJ900919170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730f9a2f2a6d255f2c9270b8bcabdbb0a85080a175a76fe4df34c033d98a4ae8. 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/JPJ900919180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e584ea7d7b654cc38d69a1f0f30e39da91b83b242a9ab1d1cb002f9c1392aaa. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/JPJ900919190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f38de0b88cf3168a74f8a06c8084f85e4ced896a48ababeaaddf940c4a125f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/JPJ900919200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27db2924058527de5cb2ff899fb55cb5dfa46a265ee4aea60e6997823a65256e. 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/JPJ900919210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7724e50205a6edf90d8ae70a7c793eac36b22702de4d6471ebf1a0a3093bb20. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPJ900919220.