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 0x4808617ca9c997642b992a2099bfac3d62400a3168aa175102d016f35317ef45. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55e56c57-0c25-4c0e-a174-ea1ba973bb8f.json and https://artists.proofprofile.net/proofs/artist/55e56c57-0c25-4c0e-a174-ea1ba973bb8f.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 0x812e45f6ae36735cd7dfd6484f23f739488e98f6c9debd05a3f6c1d8618289a9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QMXK41400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75ed601f8e61933db37c5eefd3d77e49580d1b44493203153ebe8ca71067e7b. 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/QMXK41400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae41e97e3d0c56a30451248de5ac3c3f41657b8627928fe68763d1ae666dc382. Chain 2 (Bitcoin): anchored in block 957240 (2026-07-09T00:47:38Z), 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/QMXK41400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e95c0e1c5261a93559c3b26401b4f1b63468624bf9f514e20a4c6abc018cc1e. 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/USCGH0979352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb425d9395067866975b0bd251e3a61edaf205b61913dd2735d41697ae85ab430. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USHM90420845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd056942b7321c004f5683f7c9c9c5eb85c18584daed0a5299d09a49c476f792f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USHM90420852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d312d16b3696f95660e8e81c1972fde81398a92ab7cae6decb5cc008baef1d. 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/USHM90420854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abf993caefea53c6598264b9486565e9be023638d3c31f1dd32a109a3eaa360. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QMXK41100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337378dd2e8ea458e6f15c790250855757354e713e80061d14c26d7819257208. 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/USARF0716061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03cd109121f00642cf824fa68b90fbe8ce6bd1e788c8a0cdbc18270f54fc937. 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/USARF0716062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3530958bb6c48e41b51269242e016dbecc834a1b386ab811ec6c86c494371a9. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USARF0716063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d96bc0ecb9bf4dd3419d98e7b5bb314f58f9a19a31762ce242aba98ee23cef1. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USARF0716064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be910a3524cb1521ae5a7e9afac0f2c8fceadd7981578cce1ce954610458e21. 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/USARF0716065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a1efbfd1446737302646659ab095288ed82fe3a3198ae7b8f856ee9be5cb05. 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/USARF0716067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31dc46fd0f5c12551c88f9e0389b5cbbea37acc597247133a2cc9e2f27cee7da. 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/USARF0716068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9897e962adb4b9fdf63d9e8272d152cdf04e4b7689a76ed6f42a89f99257dad7. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USARF0716069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb68c2e6e303d179fbe6a0d9a93d6a2f8928b880e5b9753cdd5a1425fee5415. 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/USARF0716070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade6c9fd250a0c2914d98d53b1819582174f92dc8ad98038d7f6c442487843eb. 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/USARF0716071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd389ceb3b38f8e53c4eb291c3d57947fd9edb97019f86d70df236978c4e9438. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/USARF0716072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee32015a504801105251a66289c5c68aef3e593e14b06cf9040804ea55c97c77. 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/USARF0716073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f506a2ffd1d386857cf2b0131976b8abfba127ff93b14574099ad014bec776. 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/USARF0716076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc046ac85a9cd6e4a83694dc1196b0bfdbd630482986df8d8bbaf68e76dac5dfd. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USARF0507003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6407a602e7e261ef2ee7f1b4da64a4b3b5544bc5227f79d432a46f4e80f92080. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USARF0507010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff71d4dcc94fd5f38285029bee3b838ef571e888e0e31a45929d567e94d798ab. 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/USARF0507011.