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 0x28385761c12a9d3ad1ad591dde09615bdd5244154d211a6538dff7d26c053c8f. 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/26864ddd-2ddc-4d5e-b51c-348a5ea1bef4.json and https://artists.proofprofile.net/proofs/artist/26864ddd-2ddc-4d5e-b51c-348a5ea1bef4.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 0x408ff56980d83889646e2d80f969518dff5f2a727ca8ac8be4bc28b5f4636e38. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USUYG1446154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c2d7000bad1114c5ab1623930f47c75a479bea1b165531c8060cba1367bed5. 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/USUYG1446161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa74e69282bfbedefe9686fc60c6929cf8a0d0626ef46b51528a5066b55c434c. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/USUYG1446958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1279e48a0eaf9cf4b587c59b929ac2b2d67b51d7f55b848b993b1e495bbaa8. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/USUYG1446981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802e5546c92151cede6fe8a81f1cec84974d4effed302374c274bdfca77df9d1. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USUYG1446966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89604548fda576f30fad6002a9266659ed2044952fec15fc68fb370f0e7025a4. 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/USUYG1446982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30bdb1700988fcbdf87a1a8b19d0d5155c61dcd0c32cda4465d0df910a29a26. 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/USUYG1446983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88bfedeb1233e679ee3862710dc55be8a8f60f8445ba4037c0a17b5beaa197e. 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/USUYG1447012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd05ad28b1d121dc33dc79f177794af865a4ec35f2d9084c6d3b9fef7253511. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/USUYG1447013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065b6ab0994449031b68469f5e70b5f0f1e4ec5cd5848f39f358e15d5290a6ed. 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/USUYG1449415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2939d21f6ce72f9c8fc0e9746fb283f9d1332643c864440eb8a66d5765a41152. 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/USUYG1449418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae3daa032c1e0058f99f66c843a87568c8b10eaf56cd8f9f7307e053edd915b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USUYG1449419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b8f1634677a28557a953fa21050d3ba32b1e1aa349faedd366169e1d8aff22. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/USUYG1163018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ea461b741e43574d6efbc525417bc25a169d89e23e540d0276287749962c4e. 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/USUYG1208688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8ae9ddcc8a95184385597cb5f3578713c4433e5e2bdbf8aad47a19309e183a. 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/USUYG1208687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8273ab246c731fb6c4bced44a936a2ad56ecb1b47ea8ea28ba4ef45c2c08cfb9. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/USUYG1208694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d271d99fc551c81b3948cb59e07d81c99c0b88f925260249850c16788aea27. 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/USUYG1208690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2a2bcd3735f0681f7ab87acc322536cc79b8b8bcf009b5aa13def67649f3fe. 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/USUYG1208697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007cb431ffafa4786ef79febda6f7596ebc1c55d9faa2a44d33c1ecc3113825e. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/USUYG1208693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597b81702728ec85d9dd17bef79735f17c1c4584aab4fa0baedda337c18896c5. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/USUYG1208696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca89b009255fad05ef8a2edfb19c9ea496e907d0a683b15027f492bf2553ee6e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USUYG1208698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126ff7b04eb620e4031ddf56c3793f1aa7fbf5261dcc1244eb90f23e03df0e09. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/USUYG1412928.