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 0x21bc3e08f1eec46a4692a74c824de9821066a0c955764072d3948a3cac8a3b2c. 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/04512540-182c-4176-a43b-aafc507032d4.json and https://artists.proofprofile.net/proofs/artist/04512540-182c-4176-a43b-aafc507032d4.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 0x195448d986652a36fa22daad675c2967bdb5f91ad876829a0e949883b3ba1d82. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:45:40Z), 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/QZK6K2383545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8517de815da66380a7b2504ebe8f6583eae344efb2206002f3254b3e60f666. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMFME2335083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd97aea52e0f20083e03ef6575abaecdd938dbb45b56edbb889d017e472eb32. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:29:32Z), 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/QMFME2335085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab1a75f0acd80d1b43554c41d818ac1670fe724742c9436eb2268916437451d. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/US3DF2426087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3181d4ff237fd57fde919e27b20d2a8fde8894b6de6d72c693f36167a2d20a5. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:49:00Z), 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/QZK6N2342808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8907f6456f0464a62c35df8063248efe8774b96425d03d6b855e000709362ebe. 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/QM7282452315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5340a1da7aaf77a0fc32b836b8cf8f7659cc69c42e4f0fae820dfc0213735289. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:00:48Z), 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/QMBZ92437314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ef65baa69f09a8b181829d8602a6f5d2c3f790f5d73adbe389e7ca4ed48ccd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMBZ92468140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc89ccd0328be5a0ac9eeadbd79a393e217313547dc36d59daab6ab3bf6ccb7c. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QMBZ92468142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822e8d5000b62d9a40deb0d4cadb71ce11de3c61efbc51af93c87b209b35d5de. 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/QM4TW2324879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5ca7b79e9884894f1dde29599b5556d6fe277cf1256e69ca8ca1dd84a1204b. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QMBZ92452606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb803c8e8e33887aa3dac51d0ffb9f708158baea9256c0f12b46929116a7fbf66. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMBZ92498859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ed79f66a2e546a076c2827ab8ad1a2bd44ce9f74f58958d2093b9bd81a3e49. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:07:55Z), 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/QMDA72421587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903916887599a5654b5531fecb2c01577d16da342651ab3bd54fb283169c5f85. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMFME2486136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06af3167310a65f6b68bb43d6b0e5ca49d33fec6124b045740a8064be52737e8. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:27:48Z), 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/QMFME2486138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e7caa49410f0a8ebaaacb8a87be8a3c2ab2e7c28a8dccf300bd5608de8d433. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QMFMF2443170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb631334b6c43019a6160d6223ea4c64b3c5752fedb68e1455625b0db1dac2ba5. 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/QMFMF2443171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd541e9ae4bb0ae66f4cf82882c1c1cf44db6c2a5b1d68f70d08a1a351bc4a694. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:32:08Z), 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/QMFMF2443169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46670b180583f28da728d3da214272bdb706a6bc32644bae0341241b532e5ac5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM4TW2563128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7285f4aee77db001b5c9e0798c0370ab3833eaad4b17a09108442540c9b256. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QM4TX2502846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3358532224072bb4cd35f78cec046a75ed69a51eec28dd211805ec4a06c14f8e. 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/QM4TX2502847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b419da3acc06f5fe1c77df22dd42aba6cef364d3432ecbfaffd779129bc04c. 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/QM4TX2502848.