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 0x4ee3fa71becaba4db456105be5e3f468b09b12d5a0a7f4eb0b3d0f529102f802. 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/13f762e4-014f-412d-a60a-a4aedfb4163a.json and https://artists.proofprofile.net/proofs/artist/13f762e4-014f-412d-a60a-a4aedfb4163a.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 0x16cc7bf4c6a676b6b631d4e7fcd8b9dfa48f0aa13b4a6640c9599b984207a1aa. 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/AR8TN2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da5383c951c7a028d8f6de382ff341cb94cc92a832fe9a0b03e38e1967b0ac5. 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/BK4DA2306280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88ceea9beb315cafbe170ab9fd5c10ec8e3e86f118f4f94c192762fac251f1b. 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/ESUM72300603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421549bf34572755569fe313ac5e447f9dec1efb862f8920c20be13c717fbcd7. 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/QZGLM2405933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9ecfbf51c7598c93979a79c7be9a2b3a0fa15de91edfde4be91dcd5f7e7ebf. 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/QZW9L2357376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290c1aaff9532fcd3ec262819736f9fd530474a3d446141fd26fcb17c244053d. 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/QZNJZ2386440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c7c0d8b52e5786eb76ed447fa4704eb8321fbd7691395dc5a35d80b0d70e95. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLM2513339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b742aa623e4816c6619740fa5d49cb836e0a91e7e243e044fe8e2281a552b1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2597449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc294c1527e179de9ecd2ce22276125ca957acb6c840b69d2690e4269908bd417. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2525782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6f1ad0194c181b302357d0b67866b020f708ce3f1273f7d56ec2e675d15416. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US7VG2539419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa96be53243c75d9f8cdb621749c689b59abca49be10b7e944e735fad87ba7db. 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/ARQRD2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19412c3ad7e349a51cb5ec9c64e84cb85aaeb2ed7b56b83de4cec6bca36a2b0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZW9L2430233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbb7b6d13f60e81538eae4f6696edcb04f3a537bd385a30546d514881ffd6b4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTVM2490484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70e0563c2d9303c608ad3e5dd5d956aee52bdb594c1dde7b048cf892171d98a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTPX2482678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075635a7fb0d64747193abcbca97262da33f2dbd18f6ae7f3e22c6526784afa8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJY2463048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365a22403825c130df96c49bc19250c694e36eb809c8f1e7698ab19eaecbea4c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJX2484205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbb582ac032c7f448f0e34c2691de2390a051c91c0da80061feb15b49ab9e7f. 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/QZNJX2436855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe39a3f6d9feee3da4107bdaaf2051e8783b64158bd6ca57d5f1401f769d1723. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJV2427493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc87e92ec8bfa404db118054cd0496ed0fab3489dc663b0633d54f0a30cbd38a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AR5UH2302594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3988bc454fd8837201faf2f8eba50866ec4faaa43bd8624fad0b049aaa2aa45d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJV2424251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7209114a0cbede83b493f1e3297d93fb7203a7b8c1ccb87d18673219cbeb813c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMZ92413268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621e1710bc443a86c2bcf28fa87b4e3b7ee38525da94cb58c41f84a389fc8c40. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMZ92413389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf94f6d0ccfe5f83ee184497003f0736c92030750b2074b5bde6a6daa10f3092. 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/QZ5AB2442738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2d8371b2daf83007c7eabe6616a4ca85ffe2c1401dfd1b903ed4f5142a0a25. 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/QZ5AB2478100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e96d67532c3c9aa0e679679922d58004b6958f7c5f395236fc336c4724acd53. 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/QZ5AB2454441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c7415788b535d8822bd0cad906f871b5cff2c1d439a2aed9562184757c474d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZW9L2354938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa809b2b17d42f958fbc68af4f41d6a7c48a3870e9617afc2e2ecd9be7d4e43e1. 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/QZW9L2305236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f4ee0c9108b5365e69d3afec169b6d4f4dc4f48a05e5c433ffc766fae62dea. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GXBAV2366052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880b72ac8aa619b3020566ef77a541c5e53231de084d4163f8b551e0fdeceeb1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARG991042433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7fde8bbb9f28f312cfea84a87aae8edd997dc1efb8dc6a301830deaa3cee8e. 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/QZTVM2328539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3059321f3c0e2f94dc1a12131e6045eb49041579c93e6c62d1f313040ba007bf. 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/QZTVM2328532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844e236e1cbf616615e161f12fbe7a1a21b7b53978f3843add0cfbf72fcfde82. 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/QZNJZ2396028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc900de99fd6300428263624562b65c18df8f01aad5289cc7916b41a8e88d220e. 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/QZNJW2376390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973576d59060b5e80730212046ed89d74d7cb9aee5ad5cdd9bec543f1bbea87d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ESUM72200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5c7acf48e79671f6fe96930e23fbf9c53251ef82365cdcadc1d4196986eb8e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES5702201758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b3b9ee5757633357ec5eb2722405a0bf2df1efcde78e46fba9137f9cce5f8d. 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/ES5702201198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa809b2b17d42f958fbc68af4f41d6a7c48a3870e9617afc2e2ecd9be7d4e43e1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZW9L2305236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64144c2f3d0602a38e19f6146f423eb2763c1ab5788ee7ddcb9e863688b0ad0e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ESUM72200178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa096facb926908ad7c72aa0612b9c4686526c3acb315a6a397d11e9cfcfa6c14. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5702201924.