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 0xfa8eaf5682b41e145165d35e169dabf8804d5a13fb5c6ec985273f8ebe40f6c2. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b09be9a-5b69-4453-afda-eae71af00d77.json and https://artists.proofprofile.net/proofs/artist/5b09be9a-5b69-4453-afda-eae71af00d77.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 0xad3115db72f53462802865ec015ecd0b4a2bf788d001beb2f3f72644763d1b05. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/FR96X1876904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06134ba323402d16ca1b8a4038259fae1407bca4c227ed6e1c145e66e3433ad8. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBKPL1943309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e1a5f09ea72ba221bf12b3d80562c490a53fa4148369d76dea73975f0d9bba. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBKPL1957055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3000db3b4f6c7dca311518b0db1039f6228bd9cc01aa52b1bd223e5ae0ed69c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBKPL1957054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9739ae9ba7492b4e2691a8699b20e142e7af897979dd531f3f81783dde92114f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBKPL1957056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3e69dde3323bf5d4da8669867cb0b67b7c51baa7399eeef60de4aaa4f76ab4. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBKPL1957061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1200ffc14470f85db9ed597869d814933326bf3b57a4c733bbf3f8848ce904f9. 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/GBKPL1957060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98146911aa1cf05e48fd109d2a1dce699f8a3e78696258da13eca3b15b51f1e6. 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/GBKPL1957058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4c16653c8ab7322ed245895336873937b9c82ccb5d9e4714d8f96b1c233b7c. 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/GBKPL1957059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1120793fdbe0b8b2b2097261d723e8d9eac3153355f4c5e29cb9e1f9d96031c4. 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/GBKPL1938586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e84cbe77dccc89f15a7f8dc51226ac3b4f53afe4f6ef26fbc1dacae30d7df3c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBKPL2138063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fab207c88a6dff9a643eb0bb7a430370d251a38333b9ddaca773af9bdf1519. 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/GBKPL2025496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c3d8dc9f75e7966775e74b185b3ba11a2da676ac14a77d556a9a8fa77ade57. 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/GBKPL2136863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31ac50bb8397279fce8a5ef9e287a68e5ab0b6fa8299c34a46420228c52fea4. 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/GBKPL2138060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd67cbac74173ffd82cd0d805c5d23819766e90654382cf0af14ac2c6a8e8a6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBKPL2138064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8d6e80141cc3b06eaca72d8361ff31a43f69ff0224fe76882282bc70ed9997. 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/GBKPL2031335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175bbcf758dd8f0e8bcb65417e26a0976b03d70faf4b150c9e1239eb30c16cbb. 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/GBKPL2021138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e82a7365bd6252187b5b53ce581f52e419c97757a5c77e43075be08c6bb399. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBKPL2138065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7eea38b4c3bcca004eb39d1fdf1fdf011d43b3bbe75db85167484fab0bc3e92. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBKPL2138059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17ee0b4114adde8e6267e89b601ed36eff20c7813d5136f27fc6eab0c33f0ae. 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/GBKPL1976578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33579dbc011f33653e3be2869c755c2417dc8c08841e41244166e7b3c924ec5f. 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/GBKPL2138062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53712a065aee583e04c75678625d2e4f6e15ff0140bdf1ea810e3b616e7054b. 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/GBKPL2138061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0df43527be51632bb00b3766c57c253b632fc28b1cb92f01175cf88e4fe67f. 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/FRX762164447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff635b20befb5890029434a1fd2829fc4fa7b312febf2ccf0a8dd3802bf0e709. 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/FR2X42223365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0df43527be51632bb00b3766c57c253b632fc28b1cb92f01175cf88e4fe67f. 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/FRX762164447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65039f429af61370ad96af286e90c49f3632cb67f20eb1d06f7598b824916ba. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DGA072243474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0004973193dc146ccc5aebb0bebd393468826734607cfca508f4fbff3c9063f. 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/DGA072243475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602253ecd3ef8acd0829e9d1128781d53c1b0928ba5a8f93d9028af8cd3a1921. 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/DGA072243476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbe96394f7e1c042f407ff13a75137fe3e0c72507d6ba003da4d6d434227436. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DGA072243477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff635b20befb5890029434a1fd2829fc4fa7b312febf2ccf0a8dd3802bf0e709. 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/FR2X42223365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb287f024f51ef7224ce435db58c9d6f757a2840d69dd0d03a790cad79baf39b. 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/DGA072243478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547df19c0b385883e275aec60d3b44f0bbc5889d11959be3d1988de61a343ded. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DGA072243479.