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 0xa48b76579343fc0a5f3a935db870202f693efdc8f464475dc7ab395d3aea26a9. 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/e57a8e8a-2627-41ea-893e-18afaf9adf09.json and https://artists.proofprofile.net/proofs/artist/e57a8e8a-2627-41ea-893e-18afaf9adf09.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 0x44b19de8949b2b6178e46cb41031f433668ce268d73852db095a9cee69008b63. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:48:09Z), 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/AEA3A2562226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbda48b2b0f880ee3e506208ea48a08344909e5b8a266846f6121979f7f0df2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/MX2832583938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173502a3dd5b5278644dbe93cc8e10139044fce9bdb81556a8b508c665fd6e49. 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/MX2832584037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd0dacf3a8cf9509eaaed02a50f873f637152f026c703a07c599378e9280c47. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/MX2832592389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdfcb3a2011264133470ecfd13549a398229710070c2f153eae80c72c76d30c. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:04:24Z), 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/MX2832594663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d2ce434892cc9e06534254857ce0896dd22713ece7476ae5af591bad2402de. 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/JP92Q2400649.
原口沙輔、あかちゃん・シティ・ポップ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9473d8d032684bcbca91410638a85ff9977cdbc9b8283d51b4f3f47df62c71. 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/JP92Q2400651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78efd9dce9e595c6dc995267e23f7a9576893d9496641a4bc56d324218d3a0a0. 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/JP92Q2400652.
愛してあげられなくてごめんね (feat. 重音テト)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a64709e2db359e1075d007d381d267ec1ec31cca2f16a20a98b44cadfaa8f8. 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/JP92Q2400640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16af8416d6d4b1a41c0558ec45447dd031634f718d06a65a0a488e69dcecc05. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JP92N2427197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb35d91b4f215bec0155561c37b3a50b7c9fda384d3d1e7ab8e621bfd5dc3390. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JP92Q2400638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf18c2eeff9cc72677dd21bd32740d4c9b9434d7d026ad5169e262e0a2b8db3. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/JP92Q2400643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a19b41160b7558d0f3a8c764732a2d8980ad8d6d860abf7af61a9626793e39c. 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/JP92Q2400641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098bffa77135cf2a123e7f8a4be8ed2bca9822dd655f26c5a88a72f96a9a9dda. 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/JP92Q2400645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80049bfd713afa6cc760f9f99f2ed64450086e4d95a487d76712394cb2214b90. 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/JP92Q2400647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb926f10624c2226e3347a368f99275acb9d43b66d098f2396c2d96588586c0a3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JP92Q2301652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7efc9f7cca3eb192ec4aa6fcfc07d3c938ca6b183bb34b3beabd766fbc51ce. 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/QZMHL2210897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109cc045b00e017682edf2ba2a9f95feec9c421b21e265257d6ee53515fe4c85. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:08:28Z), 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/JP92Q2400648.
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 0xa7eacd3f0de8ea503bedd5dbe8dd72a68c6f173a879f25d5dca6f7447c46952a. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/JP92Q2400650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0c26a0bd25004c471c089e2d296e230a7953943319451b27e1eb79444d10e4. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/JP92Q2400642.
さいきょうになるのだ (feat. 初音ミク&重音テト&ずんだもん)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdd4d6cc763700049082847a439c855c0e2bbd105340c54db4e91e4956a14bd. 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/JP92Q2401285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94be822d56093eb40e0c7984e4cb3fcbba3bb93cae4c7f5e6a622b5a1ff19008. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JP92Q2400646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042b68b3d1fd5615c73b233f93ba7c14e9089e43987af9c4a9f66c42611b2fef. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/JP92Q2400639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34eacfbeea65c90681ebb0398aa057aec0dfe41d7e0973b74d21d305535c8bb. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/JP92Q2400644.