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 0xb710c0dc02417c4fd94726d3074e761a45ce2b0600f1a09d4d6edd339dd0d3f3. 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/27a734b5-2c6a-4fa8-a100-6526bfc16b95.json and https://artists.proofprofile.net/proofs/artist/27a734b5-2c6a-4fa8-a100-6526bfc16b95.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 0x12a8e0132da27c74472c727380543ea4b9414e61b776d86b32282cdcc1f2afaf. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZGLM2030106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54515993f833e98ce56e8985ce7aa5a6e93ec76b781ce07d3b622579a309eee2. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/QZNJX2070014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9ae0f41783d4899d1b0947a0ebd6b3da77f8e2a1985c519e82c1feb77dcef7. 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/QZNJW2361692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66dc71ef8fa9ec2728e93d1354e3ecb83bb63583cfad9980986c0ff355da2f3b. 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/DGA072482951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0ab5a54721cad506a8e1629dbcd212bf6ead602a7540b614749d3b16701f54. 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/DGA0L2442447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650a98de83cd5255cf153d6902d5d68c263833d37f3a6d4bb2c4b1fd9dcd9dcf. 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/DGA0L2442448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32f0d2373626648f3cbc2d8cf52244c2d75dd35180a9f693b531a2da5f7d5db. 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/DGA0L2442449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c42c23a968d55a182b52eb7bc3695d472e38918959fc3a68ea4caf64874f40. 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/DGA0L2442450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f8e348b440bb0f6c8ecc90d0cc002eb0d209da7d065d9f6e7b90e862ed36fe. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/DGA0M2459938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbce8de206936eee60fb642b32b21ee5089ea0f40b7a56d032baafcddc4e09a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA0L2442451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5ab6fc652957a9733fa892a9ab29e073c2726ea510e581ef5bd1e114ea9630. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DGA0L2442452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76e641d0f644ea19a975006b1a69aaf7b0b915eb0a39e31b917e0bcd8a31ec2. 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/DGA0L2442453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc226442ec3ab435394771750badb7d0b53013fbd27ceda82f76e543f9cc1be61. 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/DGA0L2442454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec715f9f343482127ea6d344b00bd1701abd8fcb762aeaf43916841284b8c5c2. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/DGA0L2442455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bab61853f3955e4ce32e281fc94b4ebf19e3891e1a5aec47a32202c23de2f2. 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/FR10S2505312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9624ac9f4c611aa5c2de888ed326869baba9c71c42b6ffccf15bdd102d9e8663. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/FR10S2596249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cbf9593a9643474d4a1e7ab72cb78c0e7d562c209f073affe06abd438197fc. 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/FRX202538822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bbfa2ec52f5efb07ba776cef01d41261bf84b651cd15dfa384416490ff0fc9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNJZ2578709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760e89c5e16a321485ea3d8562fbbbe104be9843f2049594c9d18389944cd44d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJZ2578710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc529f5163e6550d3c7c8bf527e02ac46e305478b1ce70c864cad9f56bfbcab94. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNJZ2578711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97296ba8db604ef0a3ff9060601a6168c2e434049f042915208da3b388d5336c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNJZ2578718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc54aa733c0c55adad86410e3933e3fe4ff4ed53d8603a0925a7a0ccc459efd. 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/US7VG2431827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fa93fe1a2f74986c26f5acdc9cc9a8c34c6877d6bc198722429a2232461f4e. 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/QZNJW2270391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b376d681553013d6944ee3608774f77fbecb66d8db6ed375d5e6b3917b1e755. 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/QZHZ52043190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62844ae8060a0612f6c8f9ef80ec25c325749236048bfe23b51ea5f6db36978a. 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/FRX452466518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeceff5cf6d7770e5966ab0d73e02f1d7c1b7d2cb2071c74cc272b51fc4b227e6. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZTB82254055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a05dde980631bb00d7914ada8a7478d72fdd428542adc61e35328da5f9bf4c. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/SE5BU2428033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c56612837cfa28ca6b3c3294f658109e354dafa9e573d69c2cce57a3fd52ad. 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/QZES92213414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ab64b0f1a9f7af6a1d3a16e1ab08b7873fb7d7291b1c68842e71ee766b8799. 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/QZES92213415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4146c692c9990640e0d36f8d0aa147c4c3b4adf9725b41445560d9b44c8516d. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZES92213416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d24f20e29810211ea77d467c37bf7d1440b83bb323d88403e8a6b2a48f3921e. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZES92213418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c7f0689ea0e667a3a9f414c3d02e069ac8f12d0c37789e80929fbfb9df43d1. 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/QZES92213419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99852667d3ea6172519eae031db75a9d2e5aff7d52d78a18a316c594616b7a85. 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/QT3F22485869.