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 0xafee1d775c316f5ea2244031e68d0b642927518d18f2992305bcb58721d60fe4. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f107479-b40a-498c-876c-be3926cc677e.json and https://artists.proofprofile.net/proofs/artist/9f107479-b40a-498c-876c-be3926cc677e.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 0x42543789de274ce5903c8a2068e936968d165692e1053eeda673e4b3b372e003. 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/TCAGS2397626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfb8ea2c886bddcd86033c854247f0983587a83d48dffee4311aba7ae19323c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAHK2393791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e850c8709742b16ca6a7ce5342b4ff72f61244c1be4830363a076d71996d4d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAHU2415833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee74446b5598f3dc188300f50b6c056c62212e7f1c273e2cfb43107aef0832d7. 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/TCAHU2415851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5142645e2895bf5da3a5e147efe5d2f60747bb78ffd67daf65a4ed830bcf44ff. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/TCAHU2415870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf84598d8d3979617b43d45c2e28f1808052b69c5f1524e4679c1ab4e8f942a. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/TCAHU2415888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef5cc55ef8ba20e6359bc3ea320fc0b21248ae52c6e00195b4f1837b6a6a992. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/TCAHU2415892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b41029cee5432d4c2f8c1da7a040703ebc988e5e231e8c8cf4a8d80536b0e13. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAHU2415896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcb991ab011b046526f72b93daffcbca216efe0f8c7e28aef9eb1dd80a53f71. 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/TCAHU2415909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7fa65997c5c1e783493280d275c3c29bf155e789bf67969ac4b3f865ae708b. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TCAHU2415916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd39b9d33a89bb74462da75917b1a1c6b0b27d7d9b4f04b9e113c45ff3d8f332. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/TCAHU2415931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a92eeb08f237e421ee0f1205ef350d3d5c1a2aaea3fa4f6dead9129a84c04e. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/TCAHU2415950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e023e7433fcea768ec3b8ba895705f44de2c149578a85f091569237545d247. 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/TCAHU2415958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf84598d8d3979617b43d45c2e28f1808052b69c5f1524e4679c1ab4e8f942a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCAHU2415888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0731688bd861783867b7587bcf3311906788e693f32a94d32a38a28e76fd2f9. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/TCAIS2481381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcb991ab011b046526f72b93daffcbca216efe0f8c7e28aef9eb1dd80a53f71. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAHU2415909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b8f1691cb266a884f980de99afc6fe89888f1afcdee99032ef58410cb57ec5. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/TCAIO2413843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1170ccb3e437fee7d36ddd7967d10a9eedf2f076397015a2311aa3e2c03fad. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAIJ2440978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cdb2639ff21da624517cb534bc04780760c8f4a3a8b8955e45037b9ad8cd5a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAIA2444894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e208f7a11cd93d43af86fb28ec1d0a7d0c5d55f24797473cacabd0229c6570. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCAJY2532843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8710a120fc9800914d32f024d486b1a0a0d46d5152d06181c44714cb5fcd92a7. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/TCAJY2532860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0731688bd861783867b7587bcf3311906788e693f32a94d32a38a28e76fd2f9. 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/TCAIS2481381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c6e4e39e5a77af2767ef49f5bc31ec8f7c088bd466d51c5537387c945a8a65. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/TCAJN2520529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834acf4d74944f753c4e4b0d132dc5be6ff3de160dddc92e8089a6e055072851. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/TCAJT2576349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf6ab9877653914acc4258b108b68f212b2418551a3f7bf59123bfd830b3eaa. 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/TCAGW2333094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfb8ea2c886bddcd86033c854247f0983587a83d48dffee4311aba7ae19323c. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/TCAHK2393791.