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 0x1d721dbc0634ac3f53adc1ee86775d31c4a7c5ddd2e558b4d336216364dd2bcd. 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/b5f226cc-b29c-4bcd-821e-de951c2e9265.json and https://artists.proofprofile.net/proofs/artist/b5f226cc-b29c-4bcd-821e-de951c2e9265.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 0x282a1133db7c006bfea85d2d8ff29057dda7007defb724d9f650f9abcdea69a9. 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/QZTB62347818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd79d5cb1e0f786045bcf7e9b03a39c1f81133efcc95bf26c1016cef6742d84. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZDA72401688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a81c8a0e9b0f4fdb1f4c2ba16622ce0a8277f4d22b1188e5b567f74ccfb290. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZHN72486691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ba1a630ecf5376d74034a0d8cf3ab8dbdc8a23817c565570d9079ad10df295. 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/QZMEM2489988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658e0bcab768b6057ccc30b9c9bed10cc31bc939834002071992427cd62219aa. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZMEM2489989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e241c0ff76030d55f16c12fdd2e021d31f988573cb937c8c3ded6dc9104baa. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZMEM2489990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ecfb2115c52fa0b60905069e4c518ec4a2cf101f5a5f6b5ea0fe60d5c3a87e. 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/QZMEM2489991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13aa7fa295a7db8c574fa42c8ec6135873a4fa9fcb9996aee11f2199e699b2ad. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMEM2489992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571aad1506f5fae5b6d1b822359b591243afd4e3bdc5ab7aeba5db0a82058e2c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMEM2489993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfba5d113bdcb55f37f011135bdecbafa622c377d95fc1bcc17ea982a1cdeb4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMEM2489994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da9121e48e31e33ead405d48f7620d42583a7925be8d635b1e9a776cc0950d3. 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/QZMEM2489995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf7ce4f5d20a14c7770ffcf9ce80c9e6820a7e27001586a3a8e26afa7979a51. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZTB22487890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf19c60c88bb4d7f576256f5529954ec1ebef09e65035c13efeee4d1c933f3a5. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZTB22487889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee92bd38b8a46d8bd93d42748d19afc44d3cd87d5d7ebe3135954b7e9da6a22. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QZTB22487893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d581535e39671314b1f6147bd236c5bbcc2c6807b590d3ab502791e9b0f30c. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZTB22487892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a5e1dcba732d3bce5cea6535f6b59c1aa8aaff96e48cd9592500d3e912312b. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZTB22487894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb27228c2b17279c88a410a669d1d4259e59e458b4aba1148e94a7ac279c760. 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/QZWFH2431624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f0eddef548cd6cc391524269adc17d8d269931aac92e5bc85a4dfa07fe61c2. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZWFH2431625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31593c3bb3dc023ef28dd852ed346a8d3fd2106fd0957bb305dacf80b53857d0. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDA82534282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03190b2c9d54023a54bb059ff15c6595b4963226b1be8818d1cf40c36d1c1db6. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZES52514807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a96d81adc4c8759929fdf0be855560a8a9a80835223445f052b0aae013ea0b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:24:00Z), 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/QZDA82534287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704571956f5770ff49ba5454e6174168c32215b7cbbd93221c20734ccea85744. 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/QZMEN2572392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea5d3e4ea712355fa2dafcdda542573724b2ad7cfc9ecec3f2f422822b99c5c. 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/QT3EX2568817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a74b9436ab4a046c031794a31acd154eb42a99b846100c8d357413afa7c940. 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/QT3EX2568818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62c6f35850e7475b2f9b701a760e4fa9abf256a212719263dc1ea7d55304832. 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/QT3EX2568819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da106e4bc95b03bda0eba25ecb9418e24c6da0d787c8b0739df98b4ea260c3d. 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/QT3EX2568820.