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 0x099430f1d8207e38da3103ab1c853d78ea0595397e3fa43442bf6093341c3b91. 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/7dae2a5a-7918-488f-a286-01c1bd9c7b1c.json and https://artists.proofprofile.net/proofs/artist/7dae2a5a-7918-488f-a286-01c1bd9c7b1c.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 0x25fbfc3f196210029e489b2b119c967899d50ea879b639f853796a18ab55c82c. 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/QZ4JJ1902521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a92ff1a400501879704ed0b24dae987dbcfbf2cc1d443220c9af66ee5a4167. 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/QZFYW1920325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b3f47d06d7654ba0a864eadb02deba43bd08baf55b33ecb818f69b301d7490. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:45:25Z), 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/TCAET2082686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46dc5ef5fe91d874e517daf9562e0e4c6f0699e905c734827f8022d65ef5690a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:29:22Z), 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/TCAET2082693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93f289650fb2e0b85b062758395418bdef3cf664ebd2c39801a7228e3c27454. 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/TCAET2082695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746360d83d5d194a09c78c75c8d1ad0f95eea7af5a2f753ff92a29efc3a2017a. 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/TCAET2082696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3905cc2903e80412ba31bc979c116c83a20eb7c5a576fec97b3578e8cf849987. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAET2082697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9750f0fc52560615680c8757250499057b198da213116e7b4a68bb54497b24eb. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAET2082700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe230e3cd4477ebe6b9f6413e12c4654aabcc88a6c748d8c85fe382836d2d9dc. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/QZNWQ2182652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f9468da356946ec5df0f67b01114dc7abd83f72e0c69d2a9687ed032725098. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:01:14Z), 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/QZFZ72269063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42a72a2930bd02c8e80bf60360aa7db62e63f7c8429bd813a1b1ef5a0044e23. 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/TCAIP2434429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80a597c14fd0d7f74dd0b1b3da1b0f5d01f67abb783fb484985b26fd67a8661. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAIU2491329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0235f82b7f4e81a99e60d1897e22adf750a6e0b7c4b56e43f94b59bc180c42e0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAJB2422775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80a597c14fd0d7f74dd0b1b3da1b0f5d01f67abb783fb484985b26fd67a8661. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAIU2491329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a61a51de00ebea27129d0992dbad74fddbc0bb859e018834c534042abe27e69. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/TCAJB2424214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0235f82b7f4e81a99e60d1897e22adf750a6e0b7c4b56e43f94b59bc180c42e0. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:18:41Z), 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/TCAJB2422775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d82b3fd1e7eeef4e2fea5747695ffb205b9e2367abb102c9feddf76c14cf1cd. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCAJA2424772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1387cc565e3ebcb945b6d15de445558b531837d67a14ff29d7f08cd04b759a92. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TCAJA2424783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c40d12b0f75588d82da6880cc7301150ff0510aba968ffa40115e6e0347cff. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAJA2424804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f300b4eacc065268250711b434934b732db39b53fc2ca59b8f231cddb2bfd21. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCAJA2424816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64ee1919960037c7643556b0ddc631b7e8ddd9b89e8e0c77348c7d691f86ec8. 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/TCAJA2424819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3cbb98fb6a31619354dfbf8c33c7dad3c9fd171fb69ee5607dddb5cdf9d555. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/QT6E52523407.