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 0x072f9f7c48cc7ef3a4f820f5fd35769f319aba017e19cb0e8e9ab57d9d4379ad. 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/ffb1f5fa-0b5f-4850-8d19-a889f97ecc1e.json and https://artists.proofprofile.net/proofs/artist/ffb1f5fa-0b5f-4850-8d19-a889f97ecc1e.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 0x056b8e0d765e1365699907f3d8e59573397883621f8c35dad5e7fd3636f8a6d6. 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/GBLFP2212358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34757e9de86c3c7a69f3b833480fb09b6501096e43c8d461b69cb4c541276d8. 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/GBLFP2212357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ab5702fd79c67648883c7b2e0b1f220dd9927e78d89c6d3f0e611c2eb2aa6e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLFP2212356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40517b484895272ad6a2a471474fed49362dfa5eb95446837261dda52b357483. 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/GBLFP2206410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331f7114dade83951e00e2ba3df09eeec14fee03fbd5140735ed7790a8f6ac62. 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/ES6671602887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869f0c9ff83791ad80e71bb83aa9e9e4aaf23a8bc3da0820367780b94a3b0cc0. 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/ES6671602919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065214f8cb2c33d83fdd39a7c3d90a7c8d38c0fc22726cd0709d5b445d0e20fb. 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/ES6671602920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab8804cbddd114a0d5636f10b1bada5042955bddae401ad3cf56264ac808c26. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ES6671602921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ca5344b831570328f16bea451827a9d3f442673df24e0576a08464ffe80311. 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/ES6671602923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c3967f252a4ecdf939ad59de4476da365818c2eb7cb7c624d6f1ad6145112b. 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/ES6671602926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a31718ec524d81de5805c0dd522a3efb56bbf3d902c853f3522766dd8ac5b6. 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/ES6671602886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93d9009cd248aa1776e29e7a293b0a3cdd05c44b242d414139ed66d1e222f5b. 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/UKXN22291810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc25fce5ddc278e74c15f56b0071d7a77fb3a130efb938c6c42756e6a07dc863. 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/UKXN22291811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d1db4505475f3b467e3bd42b3fbd349ca1ea61b2df9e68f9e2e49e0303203f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKXN22252042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1126144d5b20c962759b0435cdfc7570d22c173deb30790099d644bce12b5f3f. 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/QZ2J21505806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40517b484895272ad6a2a471474fed49362dfa5eb95446837261dda52b357483. 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/GBLFP2206410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9b68bfd7e3960251e1be2280f82d42dbda90a3069a52cfca30de132412944c. 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/QZFZ22292662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6581866e41dce327f2f60e2a48f85c65ed77ef8790610489a13ebc6016030e8a. 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/GBLPF6692649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72595ff0ecaee218af5b1a5bef2746d1315555f0d37028ea4c560a400d141d9. 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/ESA011911878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a6783d9090f08dcb517847b5409258e04427c8d5be408c7b93690861b087a2. 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/ES6671703201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331f7114dade83951e00e2ba3df09eeec14fee03fbd5140735ed7790a8f6ac62. 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/ES6671602887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a31718ec524d81de5805c0dd522a3efb56bbf3d902c853f3522766dd8ac5b6. 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/ES6671602886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b11de69274cce92183a693949fb9ce16fd4d3161235d75540af38f90b014067. 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/ES5301253253.