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 0x47e0253f13b9330aee49a5f9e37192b11b8ab90eb97e26b19d3fab3c389e287f. 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/d71cbe34-8beb-40cf-9b70-eee96c588267.json and https://artists.proofprofile.net/proofs/artist/d71cbe34-8beb-40cf-9b70-eee96c588267.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 0xfd1b4c603e42aec7b0da7307cc2c19390a7cbb7a62598fdda978b9ec0911cd4f. 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/JPVI00305760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c05d30b521f538350ab04d635642afbe52ac9dc9bf967e348febe9de1639e2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:37:38Z), 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/JPVI00244250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b3e7b2f4e0152adebe7850b5e5a5d4dd9db731d4aef976578ac9390c5c6a58. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTB52553615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c55701bc61d9c2f132ffd61fb5f13bcc6e905c8f2053e781b6fd9d9dd9148b. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/JPVI00305780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92cdbbc9817d0e2821d758a9e30ae27eb9767e96e233531c8d21c89345d01e5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:03:29Z), 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/JPVI00305800.
「無人惑星サヴァイヴ」エンディングテーマ Sunny Side Hill
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2413585bd413ecbf3a30a971e3e8b7e9a8fed202b6cad8dac600c7fb173cd68b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:46:50Z), 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/JPVI00325440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c149898e1893109410b4e1d10e92b97b616aefbf9b3d89c492fd0a370727b71. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:42:09Z), 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/JPVI00531740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe17fa2ef7afb1c17b5aea92efc3c4dc42887e82be73a792d527eb8884e5d152. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:29:19Z), 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/JPVI00531750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973fe8a1f1c419dfb28c9caac33d8aaceb2f17916e0484443ab16bc716aa07c3. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/JPVI00608590.
「N・H・Kにようこそ！」オープニングテーマ パズル
あたしだって同じこと思ってるよ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924da03e738f2f5a291161d3bd64614ed766e7cffa1220262e3376d9992d3cb2. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:16:57Z), 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/JPVI00625190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fa76c93399c7c48910cfa8b79c075136449ee5aada69e33fd3e16201cd4d41. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JPVI00608610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49431093758539aab76fc9ada3dc2d76f3f61bde1a5921cb54e20f3739b0d057. 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/JPVI00626670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598628b6f5eda6cbaf55adecdfad48e3f0749b46dd15950f3a2331266ddc42c8. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/JPVI00457570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399fa128ff1f32df83cdb298184ab5ab8fd92001bb948676e8f29a198aa96340. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:38:44Z), 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/JPVI00626680.
「うぇぶたま3」エンディングテーマ 恋をしてる
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf670d2caf5e9dc066f4f592aa1e0eaef6b9c640936909ce9d5645c23f6c28eaf. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:59:43Z), 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/JPG750800191.
「夜桜四重奏」エンディングテーマ ナガレボシ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c84d54c14cace01ca135c7a841d1cd4d37ceac237cdd09e3394e9ac6c24668. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPG750800391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78119c6757a93eae0223f12abe98301439ceedfad8dcaaf414e868f03bb12561. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:17:47Z), 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/JPVI00625180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65b6126326089a101a8180ec80ebc213b85a9882bc7148148a30bbc0f2023c5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPVI00209150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086b574ef19197554db311ed6c7df761d346a3f278c23e567128f14b0354d0b0. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:35:44Z), 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/JPVI00244240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2413585bd413ecbf3a30a971e3e8b7e9a8fed202b6cad8dac600c7fb173cd68b. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:49:40Z), 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/JPVI00325440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973fe8a1f1c419dfb28c9caac33d8aaceb2f17916e0484443ab16bc716aa07c3. 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/JPVI00608590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004795554e15b1dd850650e5e4bd47fa8c3fef76ebc83f80b641619fb3b31320. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/JPG750800192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c84d54c14cace01ca135c7a841d1cd4d37ceac237cdd09e3394e9ac6c24668. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPG750800391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2a4ca5738e036748f75b7c3ebcd1ea9bb1ae3a97ac82716e81761741b046e8. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/JPG751200310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc0c29df684668a305544ce628b31ba2dce67b05a673d365d6d54668a01f9b7. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/JPG751200311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26971382c3aea854fd4e9da8a366c6d2436a2330e787cdc27f5216a03b9839d. 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/JPG751200312.