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 0x40779d552af38b41f61ba9757c8303e304736d744b63b85ac93159affaa50b38. 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/c7aecd9a-0b0d-4364-87c1-fd12f9a559ea.json and https://artists.proofprofile.net/proofs/artist/c7aecd9a-0b0d-4364-87c1-fd12f9a559ea.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 0x88c8489a363a5c29fc641060133ec4a6cbd23565810d5ee739c0cb9858a9af11. 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/JP92Q2200990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6982aba9b106739b40768508f38c403bdbb23bed920d35ce60712c80fbb29a9b. 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/JP92Q2301752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce968bb1c34f4696c80b78fbeb4f73c73faaf03f556d7c67c49184b8c63838ce. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JP92Q2400608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3308d38568835c5009e589db2e9a182c3ec8611a4ffb286bbf46f11833e8bcb3. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/JP92Q2400973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05b2bdfd2487877b4086238e76372a2f2cb57e492ae8d93c04914637c6281db. 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/JP92Q2302078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368e96714818ffdda41c41d0c57b18f271c708874f1f06191cef30fab214ff48. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JP92Q2301468.
お日さまとお月さま (feat. 鏡音リン&鏡音レン)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f465e6e663bd84ee1899d00e3549ac31f3a05db1c3b84337cec4aec0dd1f51. 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/JP92Q2401166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c99e5d4bac94f0821cfbfe159d4cdd1102fee69542443b53b8cd0cac662dc1. 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/JP92Q2401167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e2eb6b092cf3b7c97593501b0f6794bae67046687f10e79c6ca72a94cfa108. 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/JP92Q2401168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368e96714818ffdda41c41d0c57b18f271c708874f1f06191cef30fab214ff48. 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/JP92Q2301468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed5fd912f6bc26a9b56f868347c845e1912b847cd18ec4b7b580a4d2dcb3cf8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JP92Q2200989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05b2bdfd2487877b4086238e76372a2f2cb57e492ae8d93c04914637c6281db. 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/JP92Q2302078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6313b2a0a376d41397d4344555f381b46a273024ee3f8c934c8a0393f716d676. 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/JP92Q2401172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf686d50122c18bf75a55b6a4484341bd8378e08a90130158474b5e0c2918f3b3. 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/JP92Q2401173.
Where shall we go?(ゆけむりおねこ Lo-Fi Remix) (feat. 鏡音リン&鏡音レン)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985ac7a5cbb00f0547b7d0cf2e15ed61275990e4ce209b9dfb82506d6960229f. 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/JP92Q2401174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78223e60a958e0fb6fcc8e0449ab0e646eb180236f2f052e13646e458ebb3c9. 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/JP92Q2401175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e072169bc41cab857c7dfcc131cf3a0e6eb143d503cf967b6abf85bfb67545. 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/JP92Q2501666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e072169bc41cab857c7dfcc131cf3a0e6eb143d503cf967b6abf85bfb67545. 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/JP92Q2501666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59763f6237baa55763266b4e26f2e496ec6152b3ac80060adb53a886471e3e30. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/JP92Q2502151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a99af5b21284a582d2baa34109b482ed36ea6608e3d1b0a52ed0c31980f7dd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JP92Q2502154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4e40521313e4b92a27cc71ff2ac6bc13f7ffa8869ef23416c086b41538885e. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/JP92Q2502158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a276fcd2a584373a2a4fb5e7ee5aaac283acf94f8f51401bf12c474da52f0f. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/JP92U2500367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94054d0eae303a75feaa9400ae17ef2210c5a60f6b11a74657e2c30866127e3b. 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/JP92Q2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe4bd37b95bcfe8cdd96e0497ecd6c0f21040d41377107c14e7dca52bc4be14. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/JP92Q2401121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce968bb1c34f4696c80b78fbeb4f73c73faaf03f556d7c67c49184b8c63838ce. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JP92Q2400608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f8f62629ca106ca11f38f453860ed0d6aa5abbc94f9fb6931b4a204a8a538f. 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/JP92Q2502309.