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 0x71aefa3575adceeecde970a6440381a19df264d3a44b4fe3447041e25825d21a. 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/b43c7c5a-edeb-45e2-bd4a-e3d08b0569b0.json and https://artists.proofprofile.net/proofs/artist/b43c7c5a-edeb-45e2-bd4a-e3d08b0569b0.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 0x93ecd292375fbf46f11b26abaf72bc6374da52cdc6e703cf74749af74c438904. 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/QZWFG2351683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb7616fbfecab90db9048d653c2d25df68171567b32c264a9843d59f7032a39. 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/QZTB42325405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0dda7ac8de3273c58cb4dad75d491cb5e307af9658994a89661e47f6f0a454. 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/QZMER2350855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92abd2e1b5c361355e54b731f9554a7db134f7d8fc672a8b0db63ac2ce65a0de. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZMER2350854.
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 0x53821f123ec134b2821f5f201078087e9bc3e7fdf204158a9ef8822148e52fa6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHNC2313732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85c3c6ed7e33ebe71370fefa91a77316592f8624ed9095ed92f6090bf22811a. 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/QZHN32393828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e76b21419ef63f278722de8de284aaf1c1fc83d995817565c968b45e633c906. 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/QZTB72200501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3483583ca760583f862f44ba34c255b2c5d37f52a221fe1ab7883c91ae37df50. 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/QZTB72200502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fcacc836ac6c88b41e74fb87391af3ea1a50b01b25a14a62775f08dafff4bb. 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/QZTB72200499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21321218b9c835f8710c9bc0712156b6e4c88a9ac797e188e8ce8b6a8ee825f5. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZTB72200500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09533ce27e001f7ef52ea37b1ab070016c77ebfd3d10a72dde0a139db93f6aa. 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/QZTB72200503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e586a1f3ecc6a16a1407562f3f0649b155cb46627e0268770134846dd01bd2a. 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/QZNWS2268046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80507f2c158c390341a51aa3a391341b9a61279d269d5fe559720e28b7a42468. 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/QZK6G2239492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdc787c814ed131ca2c52e3a528861b5d74f0bc9ed9ce12b5b2073e2b85ff09. 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/QZHN72255233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b65ce86ca049d2682900a389adac5cf5ab74e5036896c698802c99c4df644c. 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/QZTAT2105733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67af497a61e4104307840da549817108653fe53bdf85a82b31be8cedde3b8ac5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZPLR2197344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df55007ead6dc04809564cc60a3b441575df2036b2be381dd4beddb6e2500b3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWX2122028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f1a306cd0db7f357fa88a25eb8363c8b0b9dcd7c14e4094b77dbd72987b587. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNWQ2124106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921b6e3bfc5742c694f91dcb0a4af1cdae1f97cde3d463aa966583668734160c. 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/QZNWQ2124107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29dc330117318ad3fce25f21833840e0436e6971031955afa674315b2e0772aa. 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/QZNWQ2124105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341e645c8a78ceef53406818e8b41fa5991da622f27d97a9bb15f094f3ae86c9. 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/QZK6L2187751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5710aab4a5716c170b2b1f8f54449f6d53cdcf5dc821a42c7f5f7d9b3ff9d114. 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/QZNWQ2123572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc674b4006d06178651c45ec3d0a061bd207d25d7f964109786029178d74ca1. 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/QZDA82197225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106180266bbe0c9e48c4155ebe39fb0cc7793525a0d7882865c02e5db50672af. 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/QZDA82197228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038d10dcbaaedcee341bc41a437a0e313a5d799d3bf9df5058d6dffaf9f74f86. 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/QZDA82196107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5339b5130efef392ec275262bf7f675cb12fc4d13eec0065ab3cd2db633109d. 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/QZFYX2177893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51052e358a462ab548f298a08a3d3fe82d57b8135f1ba726c3b2aef01091cf1f. 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/QZNWY2071330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04ce51a527776d622b9bcdd60af66cbe2a3f089dc1aed977328729e53446744. 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/QZNWY2071331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf49b0ddb3b33b8749c82ecae620a4ff43d3e44bedd46966daa04d734d5f229. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:10:51Z), 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/QZNWY2071329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef342abc911e546615504d3da1954ccb6bbd1cb2347e91cd6a8e7bf4083750dc. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZNWY2071332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d815825b237b2bbbbb9471609ee03818d0bb80cf5e5457aec7dc2e0f1faba39. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZNWY2071333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072632144e692ed015c729d0b0cabef955e47999b720fff671a365c737fe16d5. 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/QZMEN2074392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d60293331e6225979ea48c49d5cb09059190e850c295b293c2ef685550afc9. 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/QZK6G2057190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03354ef8cc0fb5d90158bb30d73321e718f95e8d0e493031761b361324f75868. 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/QZK6N2041942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecba1f1e9c18444d146d86f918ba2df503513c7c4604672441480fdf8f7d470. 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/QZK6N2055473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aee6e4c68c2540488ccb0898b1e70398c8828fba099b9a20d5051c972ab0313. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6N2026291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c63fb47ed4bcd00e080f4df265601d1b4e7cde343f79fa27d09754e90c7f00. 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/QZHN82012392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b5a6b92f38ba92f3c7941dd3c2d25fc9deff7f9b441e4d98844f5ad68c150e. 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/QZHN32070919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bb5eb5d91390d664ecd50d74234d47b02e561b12c87c6daafb7bf8e51c736f. 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/QZK6N2026178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d381d7efaca58f56a4d51cc6433821d05caaba807f92d9970718c8e0f4f102. 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/QZTAT2429548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630660b8885b3b8f6d992ed728e43bde0ccc165099afdfff42345e9175e463ed. 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/QZHN32433956.