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 0x04f7059015d4a0e310e11cc24b88a3a1a8eef5ecd6f57d3a20b510a0c10f00fc. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1701e6a8-3e38-4be2-96f0-c2c04f506a96.json and https://artists.proofprofile.net/proofs/artist/1701e6a8-3e38-4be2-96f0-c2c04f506a96.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 0x3fba47a7d759fb77a80b23e99b7dbd4a532039a0b1f8f233632da9199189746f. 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/JPVI00323440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f609ad1830c6998f9bb3fb289d9eea11706208cce2d5b439abb5ae44fb90ed. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/JPVI00323450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482d0cf2923ce7a224750bf24faddc88d15c1b41452c831a6822a758f53f3bc7. 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/JPVI00323460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c927cc964c841b1a02d6dd8ca24d87f1fe125bddc2914537d934e7b5022c88b. 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/JPVI00323470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3112eff649075693ca2f544dbdee9da264bb3f7ab67cd9f2dbaf93556aa0f6. 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/JPVI00323480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509cb13117aaa279e47f4388cf8fec172a710361d84655fb0ef7b60dcf5673a0. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/JPVI00323490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bbb66dcbcc0eb174cbdcff8e7999fea90fb42a6c70cbdec245fd24f8cabd9e. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/JPVI00323500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17c1f9ee1fcad6509fe7341342b82853fb526b4fb77aff0a1a0caa195f40430. 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/JPVI00323510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a4e7bd842569b037c8613c3c54e6e3bbccb50bb9ea6d5efdd0ea1caa1254c9. 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/JPVI00323520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2db9a4ee425e5324e1155db4fae99a78f36d6b52e6aec40ca73b8f1cff55359. 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/JPVI00323530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140e6add5bdfc3b8dab32e95b6fd8e1bd0a1e7f5fb3796e2a8f99169b1180548. 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/JPVI00323540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1009445cdbdb9188c3c3684f08a2ae26bf176e52f37b953605a36a68dfc8cf02. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/JPVI00323550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7aea36e617644424a9868c7e4a1aea872325065637bc9bbecd47d055ce51cd. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/JPVI00323560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3276f3b8d7ca717df1168393ddd54edda02df78a48268c29ccdd6cec2b511d. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/JPVI00323570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42128c04e446d232412ecf2e4378bbcbbabf817068ff2e7830ce09acc14aeeed. 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/JPVI00323580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa56d789de1663eb25b3ba8907790e55020b698465a153b087c9e730c474502. 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/JPVI00323590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c96d3edb847a8eafe38f11002a80e0f85ce91c40c63a43bb551f972f016bf6. 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/JPVI00323600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5df9224aa004686666786942d6c76899ddc4b9be4b3f95432c3854c3ab56af3. 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/JPVI00323610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda11b21643663d51b8c538613d7a80c37d637967f5c8a4a0ff8c9c267798c07. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/JPVI00323620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa845c5085e2ab12f35da07835343865caef99098a8f0b9f9812ff63e0c187a12. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/JPVI00323630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2758afd5ec247707d632d7c460dc9f143e5ca39214dba4b2b82d9c08b2fecba. 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/JPG750800515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef29d760defa9eb31317a2db067b0fea4b57760e79aa05688be9f2397b064226. 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/JPG750900591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523a09d3f8cea6161294d263177a10c35423a3c349d766811751dc21b09a31c4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/JPG750900365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7713c8dee9b73872851371fa401ba65f29a793a1c539d5097a35a45c228770. 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/JPG750800403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5347ecd1ab82b5449f76a916440cbf87cf3592f9cb2bf469c31a74c31ffbeff. 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/JPG750800486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19457e5f127b2a180d0b6f352911b9c74ca7f7da2de11b63547c9294b5f710e2. 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/JPVI00708310.
Hajimari no Asa ni Hikari Are.[Angel Feather Ver.]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb004fde8b99424bed48a697c247ae891cce8745aeb603fe128e4fb92d401979f. 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/JPG751100614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e9068e2502cde9a3cad3b0f8a9f47ddd61d500aa11e74c60b31aec54089028. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/JPG750900373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383fc042408204de2ec1d96d1a929cddada0107f1806c96efd76b00e4887c7bc. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/JPG751100619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c9e0bb16f5aed525c29f598896fabe1199ecd9ae2f092f333edb22181e6609. 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/JPG750800414.
Tsuki ni Kakuseshi Chou no Yume [Angel Feather Ver.]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bec4a806e85099c003b5fe1270e950d5ea6b946c4c04461d6b58fce1c3be5a5. 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/JPG751100615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53aec9b303dd9f38bbb4fe00c735f7f26b648057ade1c6c3b3a507bd35dbbdd2. 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/JPVI00406780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5631279c78388ce6337d133305302767f52756f1322bfddb1ac91c719fdce87e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/JPG751100616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9636a3773369f5e30a649362d3d2e9cad5ff4f9946994179fca64be53b295051. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/JPG751100620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec76d10306bcd5163c79402f22e7d7d96ef44562b1d81554caa3cafcd57a386. 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/JPG751100621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4e5fa50820fd9b3b9467e071ccdab791641518c111dfc0b2ad12ee2a00aecd. 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/JPG750900596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda11b21643663d51b8c538613d7a80c37d637967f5c8a4a0ff8c9c267798c07. 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/JPVI00323620.