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 0x95d2e68cdfef2b574394e91879b5fd3baea11257225f1b543a19f4aec3403a50. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f8de88e-2afe-4318-867e-a9820d2ae591.json and https://artists.proofprofile.net/proofs/artist/3f8de88e-2afe-4318-867e-a9820d2ae591.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 0xfdf449cfe231954c6eb7eb07523b6c3317f9e67f1b7971338582d4860fc90462. 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/JPS306900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb611320e756988aea0511c30dad93ff5a5350bba5e1e5cb327b4922dbcaa10a5. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/JPS306900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac2979aa3f09f9fa2194861cb8e6a66efeb201c2ef58539ee79b3377210cfe2. 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/JPS306900168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d7f3ef61f058a4abcbeaaf7d154966aea5d72bdcfdfa442c36a83e4ca70736. 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/JPS306900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f14a91ec65ed6970874722ce8c02e2f9fb12b651a91fccb5a8f61368fd6f72e. 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/JPS306900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59dc217320ccba990de237d727824c9b931d30b30b86ada8b1e9a69d76f3b94. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/JPS306900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8328aae3497ab8c6e25992d48c397d23c8df6961fbb66be6b5a7121076e4bcd1. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/JPS306900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88810fbb6ceeb216da2f461520690c647937cf4119b3dccfa286a7c063f23564. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/JPS306900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab342ea49554f811c9f35182ab0b2fafbde2a578f18b21a2e7cf85a385081d04. 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/JPS306900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5894ec9f7b9dadea89941385936cc15e74a4400879b70f2cbfd84fdf6545218c. 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/JPS306900002.
もしもボクの背中に羽根が生えたら
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688464a687219514331892af5221e9a0248af7e366b8113a552b502a8f66a220. 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/JPS306900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c4d75d5a4dda082796927af54d7702cb7cbc7c266b57f8c1ecb22cd0ecc911. 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/JPS306900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a51661dda5ccd1c57397c1634f57970ab4b6b267f63f13fdabf54b9f5ac47a. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/JPS307100118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93be260ddcf1ff37f8e9f63c7d1726ae648878a0b16f665d71c263c5dfa7e391. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/JPS307100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6bb8f685f347274db9d22f725362a1af954d7bc4022793044009f6a6ef0f0a. 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/JPS306900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc029f85cea6dadb0e75d20a021b3912011081f4519ad01bf240d14bb6a8a9e1c. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/JPS307200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5894ec9f7b9dadea89941385936cc15e74a4400879b70f2cbfd84fdf6545218c. 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/JPS306900002.
もしもボクの背中に羽根が生えてたら
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefdeceb3196c473d3174c81686da0f95edbf991e302588be072ab908b7a68ca. 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/JPS307200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5d047fb68e43afee4a6bb3eeea0698666796a3e8bb392d8806406938d4fb24. 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/JPS306900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c392c2c8806a949d09f1c5615b862751a1ffc7867afc46ec16bcb7c49bbc114. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/JPS306900181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9bb24652e2beb1bfa9ff0a0f1f1015ff97a4b96b5c879e55b0f0ed57b87083. 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/JPS307100117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b21ed7982d640ae418414b6db306b60431a0740cac926f911e7545dc1ee3b32. 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/JPS307000159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0aa329c4b8e0539360714b43729e0f72d932228ac69aa9f9f1048b8a9f179c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/JPS307200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84796752570ea14c9bb12f819dbd2b485bf56488285e76accd00043e19429f4f. 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/JPS307100114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79c0fbb3fa761a23249610210b8584d72e39fce526a71f9316cd4aa31db59fd. 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/JPS307000168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c49182499c6a5f5f0ed1c26eea805ce549e8950bc3a9d0a5eb8f65f71ac75c. 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/JPS307200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027325ea0fb3308c2320bead3df14b734cfb023f05f25c57f500e8d2be728e64. 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/JPS307000163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fef1024bae4d02434cee9110056ecbbd00afe2df01d6d43d6915499ea33188e. 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/JPS307200179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69265de1450dfde84d0b21df23aa601a14b424259de7aafbbd831269598fd7c9. 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/JPS307100080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93be260ddcf1ff37f8e9f63c7d1726ae648878a0b16f665d71c263c5dfa7e391. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/JPS307100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e6ef2471d1b92b22e2dfc2d9c01560c5786dcd21435da31d4b03673a8a0809. 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/JPS307100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd3f8bbb1eff4d9a7eda785611f9fc122d2468fa3e018833fdb5c3505ea87b1. 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/JPS307100111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4553c34c9b1253d0b58e6b9219ba85a147ba3a5200ab841c0a063787aabf28dc. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/JPS307100112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd22bf6773b53ce9781600b76ed427903e2dd71993ffe52347eb301a962692e0. 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/JPS307100113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0b84edb5be7c944e4f7c1caccb8cab66f572a9e3008bea2d2144fc367528c5. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/JPS307100115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9bb24652e2beb1bfa9ff0a0f1f1015ff97a4b96b5c879e55b0f0ed57b87083. 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/JPS307100117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a51661dda5ccd1c57397c1634f57970ab4b6b267f63f13fdabf54b9f5ac47a. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/JPS307100118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1763bcd2323cd8f56cb8c1d859586ebeb7197cacd4eec9446118313f74b7278. 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/JPS307100119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c92982e938ee1b5fd07164bce40f6f0033c128505433b2014fb445bb944560c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPS306900177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c392c2c8806a949d09f1c5615b862751a1ffc7867afc46ec16bcb7c49bbc114. 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/JPS306900181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c560d314fee4cabce4d8e94778d571ed9e8e5d96362fa6e57c67b36ac4e770. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/JPS306900159.