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 0x14e2cf30c357405bfd52c3bda3995ca92c00339cbb06ef20a7d6e0d7c6e7b7d6. 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/9e8ba3bb-e637-4bd4-b8b2-54fc4ce38119.json and https://artists.proofprofile.net/proofs/artist/9e8ba3bb-e637-4bd4-b8b2-54fc4ce38119.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 0x5319223140f652f0d1f42cd875da67498b1cd678bf3e7df66b9df885a4612efa. 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/CLEA21500444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cfc52893c051b4a123200370db4679c6d8ef8f935efe651e36cc5fd855539a. 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/CLEA21500445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b7d70c26f107a695cfd415f06d74528ca12ca9a0ceae17a8c2183991fc80ee. 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/CLEA21500446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe421fddd4d732bf6461053fd1d01e9f5900a2e34edbd28ee04eaa6c04818194a. 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/CLEA21500447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebddab2b2fa67e26823f20ad84acd395468072eec5c9b9dd7bbd71585270cdb. 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/CLEA21500448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa9ba777fc4b82613f12e6437a64fe3b6be57db9af0e2dfc1b0b931779dd4a8. 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/CLEA21500449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922471fb548b192ff2bc2eec62727013c0c863181d82a47f7082307a8ea776b3. 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/CLEA21500450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99924f156bb2ec2ecc3c5a100c9b11cdb78abc0da0ff483d4b27bdf79e6159d5. 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/CLEA21500451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300bb4306ae296e83a7cd59387cde030ac42d36222633e7d20ded1847c856692. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CLEA21500454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d022572447060e15468280a5f2905e3910ba43f945a1a5f4039f69163fed323. 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/CLEA21500455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eda9790606740fa9c1afc45631aaa5dfba618142a28cea9ff58b87431d71b84. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:48:53Z), 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/CLEA21500452.
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 0xc22088abf91f3fd033ad2a0cc31c024338f1a4a9ed5452f4fca4f3803dece297. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:01:38Z), 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/CLEA21500453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb634ef18f3e49cec241f75d727573c63c32a9851a95518cbdfa03d1727aee3be. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CLEA21300135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bcd898cc7e46d46c5ae13f925dca37ec1318f474946c676f0205b5119cb295. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CLEA21300136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51324a2dd7036cbbe88ab138aea402f716c7fa21e87d18880ab4cdc86b00fc70. 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/CLEA21300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05674091760812864285ad2aa2e5b98238c82024bef3d38e8af42e004272216a. 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/CLEA21300138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63510080516f8d83b5bf92c54d7462b331bd3a1c33a0ec6b13d98cfaf5f569a0. 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/CLEA21300139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0412ed1c1c37e6c8bc333fdd946dd5124323d381f4ceb27f5cbf87f1f6aeaa61. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CLEA21300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e542c08bf8f4a8db484c4923bf3424da02e0161e9d89ee16c8dfa5f282cc17. 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/CLEA21300141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26cb399072bac08c52e985b966fc2ea14747c67f0083c7cf4033dfa5afb90a6. 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/CLEA21300142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde33ae1754950822c07e20375cd39d4448820afee14dfd560660b2f85179cfe8. 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/CLEA21300143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8c1a7d452f4a6ba0cf4e9da741384c6b5bb5a9ef0a0d3bd5d19eebfc3843bf. 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/CLEA21300144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe896963e2aa4f21b405bd5ebc45b5e78323fdac5976b88cde57e14d488d206c2. 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/CLEA21300145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5354d7ad4f73692f35b1c35a2965c59006db12f5d31aab87bdd95d55b5152ea. 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/CLEA21300146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7565567a740ccec313e27372efdacdaa0dc48e37fec13ce98bc49f550e592ec8. 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/CLEA21500518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3644365fe8972ca0205816c9700f56b7192db72934024f9988e57f99f4e69a15. 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/CLEA21500284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca0f9757a7b149c53843f4475bbeb75532f0571a0ea1d3800e1c69c475362dc. 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/CLEA21500285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1faab9a8d6ed1c4b88679435e100aaba0ce1fd0ef4c5297a058d4e0d8b23dc40. 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/CLEA21500286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407bab27e97318f5592df2e831f5f8dd147efe1807ab9ae73e2bc7a96dc7fde0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CLEA21500287.