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 0xec2b232e68b44110f04a09a2faa163fdaecd8323389ab35732ef11918c13081c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3fda9112-a11d-4283-ad9d-6c0b91c0b9aa.json and https://artists.proofprofile.net/proofs/artist/3fda9112-a11d-4283-ad9d-6c0b91c0b9aa.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 0x87da53ddbc5b26e8410fbd9fcc8a729b083604bb51a0eb603a78f7522511acdf. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/AUMEV2166014.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371c6ec1749ae8a1c66c09064a3a8a49a2c052203b2dbadeac798fd15c7e4da8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJJ2569271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6414f393dcbfb957ec26f30a7ff5ad1a377bf3875c826fd47997c3949251168. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/TCAJJ2569284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0ac26823e10a07879dbdc80e307bb9a44489d75214c460289d93e34a8b7b39. 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/TCAJJ2569290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f129f960001b222ad7c91313e5a7de755785adbb92cff4b693f349f59278dc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJJ2569311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cd8a459de32ac19b7cb4a940d3abac1679397dcfd05d857be0fa0e68cbca96. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJJ2569322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5c07187e767e872af2a2cf63caee378530e5f986bc92c96beac315dbcadc23. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:52:16Z), 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/TCAJK2569328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1398659d06080ad64e5445154bbb091f6e53a3199868db932dada3dd71e1982f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAJJ2569331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c275450b11ebaac5b14f45a2ed58a881e7c05bb8c3724619e414958c4329a8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJJ2569340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433104592d221bf40b7b669623b16aebb2360625080371cfb66bda4e9a357013. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCAJK2502057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507f77430dcab1f5975a65817ad25ca53916a9621d3192231519230cadc4c5ab. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAJK2502070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9dc7d1713f92c0aaa0ea46b997968545b84ac275e943384e4980256cfab4230. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/TCAJK2502087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c4845ecc0f1c8b6146599171dd3c0967956cad04d7635aea10d56312047d9f. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/TCAJK2502099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a64cbeabb4ad3ef9e2771656f518a4805e70ce46ee7a9961988ef9775879632. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:42:24Z), 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/TCAJK2502104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ead9cb0aedcf62253956d094bc99969bca1d26cb65e125e21585855af8fe2f1. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:51:38Z), 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/TCAJK2502121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e84d899bb4a114faa2ba3ccdd7dc5401a7fb09b164736f96b644e24fdbd7f7. 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/TCAJK2502124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13140ff04d9a3faa6905f4c9c66b1d0d35598b1e8bcb9ce67b1a61e2a0cc6b98. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/ES75E2506397.