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 0x7a4188b15e7b93dcad812eaa5a4a57c1c8b37d43b901b0153c055cfa8da4b9b4. 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/297ee0e3-e0b6-4eed-aea6-115b41355307.json and https://artists.proofprofile.net/proofs/artist/297ee0e3-e0b6-4eed-aea6-115b41355307.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 0xeab9c06b5aa86c2f60b469e510fa6a6b43dc97cfb00b13676c6e4b62a0441d2d. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/KRB361301253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae901b1bbc3a20138d02621ef0a5c24faa90c82bfb6b44e222dd6dadc0b102c3. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/KRB361301252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2069d1642eeb84a629dd392ee4baa267c478bdcec2f0138d2411478187fa3ba3. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/KRB361301251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b017e88ba5edd667b8817c2a86754d9fb741b344ba8bd9aac614daf0d1b054. 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/KRB361301333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6f10acdfeb12d3b7e73be9ea29f0765661e62708a33fd9f50113ebdf4f7475. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/KRB361301356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6550c77cdc09861e5396cb67f8402af479d19098ecb0ddabacff52cceea6e86. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/KRB361301353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4217ec6757ede50bd466fd19c30d8903418327d4bea218881d5e9b1c32311402. 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/KRB361301352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8001e6e70e5a556493c2ed6ffe40b873e168501932b56ade97815f066ee8529. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/KRB361301350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007b9d01112c378c230e23b9ff9360e31fb7808e83aa8fee6e8e39252722a72f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/KRB361301349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251de6fba63fbebfeb27f4f08de5bba47b29e836d77fb70d99bb3a517c48d28f. 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/KRB361301355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebe53b8fe326f84f3e03ec506630125c4802d1318a83d4571f5a9df5fef4898. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/KRB361301354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6550c77cdc09861e5396cb67f8402af479d19098ecb0ddabacff52cceea6e86. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/KRB361301353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4217ec6757ede50bd466fd19c30d8903418327d4bea218881d5e9b1c32311402. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/KRB361301352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8001e6e70e5a556493c2ed6ffe40b873e168501932b56ade97815f066ee8529. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/KRB361301350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bc20021dc688a2ecc0075d0ddde37a8c1cee2e37263af622177f62dc76278c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/KRB361301347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba40845681b0ebdf179b313ed226007f17a780ae752b32253b28c83a8b11ea4. 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/KRB361301455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54789acdcdb35abf8f44dc09285665f22eca590e49612c79b45dfd27bd11501d. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/KRA341541895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16884062e8d7f99225529b153a411eb0103bdb9c733d4ec87a55151410602deb. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/KRA341541897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e45762398bbcd18c5239bb5660a1c0537924e778a2e6d867030cfd2fac6549. 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/KRA341541893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435f94d1e92a0d2077dd2e379b375c14995e5bc6d0a3ef6f1beed41cb837ef98. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/KRA341541889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b47760a81b16c34d1fc6582a50992a9fda88a186f33fe3e5242c50d0265235. 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/KRA341541892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf977c266c31d701294b7523e10e822c6c7efd80190bb1e53f9613c4768e52b. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QM6P42140306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90de6b941e3c7c039e41fccabf039a6abf724fe9702e09a96e7bf0d4a3517b10. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QM6P42140307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa526bfd62c699114a7db881d3c9011f961c6d4566784dcf50c668ec06f096c1d. 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/QM6P42140308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7442b857fb9d2d16237084774234f1df06061ea8fae9913bc8f3024137dd24. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QM6P42140309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9292fc66d03c684514d309bd53a1e96b6af44fe1b2b10ce84fc4976a06617aa0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6P42140335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bb84bf7007f60146c2176b7dab19f2a93775ebcf800ebdc09c96f43f3f2fef. 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/QMFMF2111217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9143a98a6ef50cb6f725153fb7ba9e1686727eda1f2e1e73f4499f461d69a3. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QMDA72162037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455458b617b3d4380ffb85b562f6d34e080f4c39833882c830552543bccaf65e. 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/QMDA72162032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc544b19e3b6ee3b89403574b0442dbd3ea217787539c489fec57e8a63c78cf19. 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/QMDA72162038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8835f02479b52654220fbbf7346465bab3539484828e52e50ab2689d379e096e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMDA72162045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1012e754d244e1e849b17c4946023637309041ccb01b8e8b96272606086f5a6. 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/QMDA72162050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa17e318e37c5ee8d8e857bd5874fa98e41bcbe6bd891869e8cb8f957513b4c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QM4TX2313990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d3ede0699bfedac1cf538e31e5afeae60c508b09c8fdc4c5dec8252dca6591. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QM4TX2347514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92f660d92ad928266999ac3b73584217e5321615e0c2811054548623b96c13e. 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/QM4TX2347516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df575717bb46091161443da4a1862a1e977474cd782b42a5c715a40028f567d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/KSA002303538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39c0d3dc304de8f97f62d2b19dd002a5f5db6982c96cd2da5cdbdc1bbc5aeaf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/KSA002400581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0de943059599f9d89a7bcd663027f1c364b817ebb0a1688d5b169be23ccb588. 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/KSA002400582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315d570c65e9a12850c342ed272ea79ad9a686c83e263f30c8298be0f873f93a. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/KSA002500536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa18aa8d6353b4bc1b5b49960ae947d80fb1ee285ba8dda6a090a6c56355415. 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/KSA002500538.
After Hours (At 25:00, in Akasaka Season2 OST)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52074d9cc6f75a7340ac8b1cdbcf9bdd2db5905d5a6b489d1dc76b044fa0f4a2. 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/QMFME2008797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e32cc997113851b889a6c5154af03c069b6b5f27dcd5a00ee74f960e57d31e0. 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/KSA002300267.