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 0xfcfc9cc1929cd806568cab745535337429906dc9bad6045752961291cd7cae9c. 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/4e8a7ca7-e62f-427e-b1cb-75592f6c4ab3.json and https://artists.proofprofile.net/proofs/artist/4e8a7ca7-e62f-427e-b1cb-75592f6c4ab3.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 0x5bd5843273d79d6bc86a04fa2410569a770ffc4e7a9513371eafd57a462999fd. 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/IDUM72000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf81bf886cca1661dfdce4dd98f3408a81afc22a96de8db0ba07d42f2b59dbe. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/IDUM71800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b920f8e08e8242213e69d3764c9bff4f406b96f03fdc663bc907f9a973ad75. 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/IDUM71800077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1b9b27f020dc0e3ed56a206192f17346ec3005b06e1bd1b0c8d8d563a075b0. 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/IDUM71900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4520a0ebd275c8d849cc57040169c1678c9d15ce35f76b5e11f45c670f84a75. 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/IDUM72000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829036438799cd4237a4c2f6ce160fbc784a8269ab99c21be61cc9151bcbd030. 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/IDUM72000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996685af833af2d699fd5f02a8c1eae081e7c3ce2e94c78944759bf1f3de42d5. 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/IDUM71900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6a0cbd60b99eaf1770847057902bd51644f3c7cf4847d82809d2381371c75d. 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/IDUM71900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15297a6961381a2147023fdd2d24d7fc99ccd6d487225061fac9682de3c3eae0. 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/IDUM71800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831411530ca694eb935a2e594d7ee6166f70095dd058b5d42659fc2e111aab81. 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/IDUM71800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888f47036a18b52cde02587cdad4d67462ad17d8ecaaef52f97f195ec6e8cd63. 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/IDUM71800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3674185d1a4280b3551d51c1e2373ce13f2623e88b6f9127e1473da6facae5c9. 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/IDUM71800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc59f6736b1dc915a4c82e97fb031ef899a36cacd0f659f141807214dd8f3855. 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/IDUM71800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99a8d41b744e117a4efb9a1160b32c00dc9f639592f31c8acd4d402fc934cb8. 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/IDUM71800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb34ca0fb82195f82d822c084acd16875a5b8fdb19529e1f52849241a1bd46bb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/IDUM71800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf10c8057375b59f128ba03a59f4b5fa0e99d761b5cc12154d30baddf90d7a2. 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/IDUM71800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce4f2fa8ff6e402b16c6c7a7ad981a51de4bf2e21a23bd84762eb14f22e6536. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/IDUM71800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c902eca2165366407e9081f3dd04d008cbdc2d63244d9353158c4b02034c29. 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/IDUM71800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd65d5162fc721984ee0f4c885f407ad69cf508069f0cc385c3d71f095982ff. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/IDUM71800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72572b06cf374e30a3ba16991a142df877c81e1bb41de7f0f256d8ec1a4170e. 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/IDUM71800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337d2789b08942ba41df6df370678414e6cf1051c5bfc9cd3ae3eebd8e01181e. 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/IDUM71800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc723b8f8dbb032ad45ff4af167207e11e2eddda91260e946ae9a86a2e0a1458c. 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/IDUM71800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4400e0f4f2e686ab1641bec2c47539629b8850c5719fc55b4fe799d529877df. 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/IDUM71800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c823c5da3f5ccff98c9b94c6f98d58d228c344f2c5c6839b2db9aa2466f6889. 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/IDUM71800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16cd148de9e07d0ec4d30fbe0972a51ff03920bfec19eb3d69a25973f2870f0. 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/IDUM71800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd496c197b9bbafd7aac3e030d90c921d2f291fa6b74e023530d54f8fedcaf4ed. 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/IDUM71800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa647303dc0917146700635c82b6691c128ee6d63c70c8de8a7d3a9c3e53ac7af. 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/IDUM71800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab06f39d959112346e37405ba975d74734ac1cf7583ffd17ab17de591982fac. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/IDUM71800025.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00515fbdd31ee51cd6ca0bee5461d44fb84099b381a9114f82047bd735170fc4. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/FR59R2458181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25748edcffdef2fc446c55c82efba6202134d6a1e8392a8ccc5993f6ea4eed65. 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/DGA062387041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e53d84f50e17d347e7619804e4a2776c9f018a3de7a6f4278dd7d362cfc0f2e. 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/DGA052353021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f16bff5990385ec3a91b65f58b862f11427c3e4f15c427d59a777e8d5657cb. 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/FRX282201283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a5e8ba3e0e09179d472799540e870ab234299bb22773fe5d4799241cec08b8. 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/FR59R2246803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1b9b27f020dc0e3ed56a206192f17346ec3005b06e1bd1b0c8d8d563a075b0. 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/IDUM71900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6a0cbd60b99eaf1770847057902bd51644f3c7cf4847d82809d2381371c75d. 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/IDUM71900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996685af833af2d699fd5f02a8c1eae081e7c3ce2e94c78944759bf1f3de42d5. 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/IDUM71900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b920f8e08e8242213e69d3764c9bff4f406b96f03fdc663bc907f9a973ad75. 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/IDUM71800077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf81bf886cca1661dfdce4dd98f3408a81afc22a96de8db0ba07d42f2b59dbe. 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/IDUM71800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a901915c9bcb41ba00ab0e1b25de7c0f11a2d62be4031faa02e422bc51e4e3. 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/IDAA21601708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dc9b36a67ba2d04ee33a06fc17f843251092e595d3c12bfd18219270f01779. 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/FR10S1684318.