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 0xf6d2a05c655dfda7a3b6b6ee73e9ec9da1422c026c17ff643d901d05542a036c. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c419a22-9998-4c51-bf10-9cab26d9e33c.json and https://artists.proofprofile.net/proofs/artist/5c419a22-9998-4c51-bf10-9cab26d9e33c.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 0x6236dabc84fb5641f653b5c6c992c0c8e0ee3fad6cdbe51c322453baf8916237. 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/USHM20587209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abe51e1a072ccd7869f2cc816a699499cce6ea157fa2182404122cdd4209699. 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/USHM20587211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542496c3a9b3e53e8e6800485f1dd68abba3c5a350b88aadb24554454cc80ecc. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USHM20587213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddbd19cc8bb984797cd2e59d15719a307d07125e8fa98f32c6126f318dad352. 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/USHM20587214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadcfe75b349ed0b9090775cd0a1cca36d1a7ae2034002edbbb89d44d64ccae3. 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/USHM20587215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5523393cb9bdfbc80618e7d66b903220d603dca6d161f7036693da57dc34807. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM20587218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2a64fc20908a48ed1bb94e8078187ce7be8e8ff2fa0d2a5d088b9fc690b06e. 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/USHM20587220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87d35014c29c012fa7e9597d29a5933978d208e499b24cb5a384508dd2a2b2e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM20587222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fbae5438435b16132cd7277edf299c4d343e1f58504ae1239b6ca525b81ae9. 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/USHM20587223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2add14a5bde258ae83e29e242111f90ce5ab1649ead2a7b267cc664194d8db. 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/USHM20587224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9dba9ab2d2e2af91c5cce0461e94d61c45c438d6e6fe04ebcdf85f75d6fc06. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM20587227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe461f47ed82234ac070e033478e848ceb368058907d2ef4d898964ed090dc558. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USHM20587208.
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 0x4d5404f6f55123841e0503880e3a28ef75648bedba91a997bd48178b62d55354. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USHM20587210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643bb36d1b2f1ef91b84f3d98f4324813e45e1ba12019ed98f498f50cb98c83a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USHM20587212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7da6f86466cc43738c29653744ebf88c600784cc3af52b72a78259ab781c1a. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USHM20587216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b49bcc9668a20d254a53d92c544a8cb03b859eb04eca53a8b888ea211415d4e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USHM20587217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ee670ba8f3cc08029d5e6c77c26f9ada136afa78931feabd1a800ad0fbbba5. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/USHM20587219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d78a809cd41b0a06809e36ed9b0c4f975b777ea899b5380e37b97c18ddb00a. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USHM20587221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb4ec18b016d189e89b02348794fa60b9e262714fe705b820b2740377338b2a. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USHM20587225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b19b39f4257874936bfd9564027347f993d4fc31e5eb05dcc9100df8c94a213. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USHM20587226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc355cf69336444d7a1ee6ff876527774f03046b579cd0d6307bc6409129c9a38. 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/QMFMF1484627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9447f7460ae2ef6804eee35f71015f94f05105d9101d7c92a4c346fcb46ed7. 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/QMFMF1484630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fdfb52f7a745e4e11bfc20f5fd8cecacf97c7c8ddfb42a68d9e228fa897168. 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/QMFMF1484631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5fbce4b17a07d767827af9e7208043f925369ef391952bf4608e7165a7d283. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFMF1484633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956340c5265eb7fe8c93ffe734753e5f28f05281efb3689c4404def83991ef8a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFMF1484636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee758f9f3bc34887c5ca6fb856340676e5c56885d1b6a162bc30d88b20cc7610. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFMF1484641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d85f5808fc6e3540f57bd2c0098b406fd924ff60e9705582a0c16889435c30. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QMFMF1484637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032c0f7e291727dd7b3ecbeb7908f7787969dacc9af54e161cb3f1d91175710c. 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/TCACJ1536666.