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 0x89d156c699642299fe9087cfe11221aeb72de4914b0064500f0d38bfcfe89e3c. 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/44e6c182-2cfe-4be7-a1a3-727557c12669.json and https://artists.proofprofile.net/proofs/artist/44e6c182-2cfe-4be7-a1a3-727557c12669.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 0xad86b24f58f6f528c2b1e2c8043ee182d53e0e0df244b39164d0294049663a1a. 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/TCAAS1023813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e94e8c082cd2f519b5eb2751ada05a66ac53e29dc80d860f190db9c830fac6. 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/TCAAS1023814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe117591a1851b2a79acddf82d79f2e5d46883a8b9ec70bc348da3a9913a939c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCACY1717678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7930bf07c6750ab7ac8125881779167d7392ff8e859a286fc854370358ff83c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCACY1717680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31dc3a3431f9d7b2670c6d4e6e666a92d08056c913259d9362c3cdbd400b0e1. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/TCACY1717682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc054a2356202a6f71a2327b599fe3faef20ec59bdc38bd97060bf66caa8d49cc. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCACY1717723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2364be31f6870a699bba7a4112f3f456f7022ec7fdbf57d2fa881aaa081ababb. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/TCACY1717726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7957e14cd1166eab73a4bf6d540e2edca1e33c26983d85010603b30e36c9695e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCABH1255861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96dfa5118173d217fbbb641ba856cc50058acaba534e2d5e70b8f83a076b8782. Chain 2 (Bitcoin): anchored in block 957674 (2026-07-12T07:50:41Z), 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/HTTPS7808795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9036b69c75afac6b36da5b380f4d117e78d4e03c7fe8132d16f86f3f6269bbb4. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/TCABH1255864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bf50fc86c797f4873806ac040570771eab0f401273ee28e339e3ca0915ce3b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCABH1255867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6e8b976f14cea8eda92ca58a81bb1ddb0d0cc1a53d858955b7ab7ceafd7bb3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCABH1255868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9feacedd7c28e1120402db121f862899a98666fb38f754adc286095f5366db22. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/TCACH1563387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf040806ebf605a56eca4ba2f371355b84722bb9ff01b6fa49e5c5cada1870ddf. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/TCACH1563406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb408cecd08435dec59878d5124ed518dcefa71e1f4992b78be69d716c36d7cf8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCACH1563411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64172c1ed84684779ef2428bccab935c8d8c9ff0273aeda9ba607f0d2e083d0. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/AUMEV1910492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd0acb351a16f9698ec8ea3dc9839a453bf007adb82341ad7736543f4969114. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/AUMEV1910493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41ea8532f1c777d1ba08c26ecb27dd0a055f5a6babca00122593e0594bc164f. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/TCADU1809805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafadc6c722e482e90d08a612cdefe6f0eb5130139826acf57d6fc369aa0bc154. 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/AUMEV1910495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fa3f6fdb73f5e5cf88952b10cc1b168a94936c7105783ef572ebffa4662482. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAFG2006757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f17acb25bb21a7f3f73909470856c4e4078dd34b15c802f685a9db7d68fc15. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAFG2006759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1bcd53a7805a97bd7d3058138f3916e91cc229ba2b9f671e535f1bb83759df. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAFG2006764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f448009f73175610304010d31db151d650bb9669734d70e1d2eb1db3300c31. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAFG2006771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35203b3b946365c5c99075b9834c9959103e0bd3122471d8d2639187201e92f1. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/AUMEV2265197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc959dafe60dc33a296181c722b1a9cc04dfce059b531fed0c60893322171a3ac. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/AUMEV2265201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58186ae3a439db18e27ec71a09a61535226ab7ec3b359c8167ded2e090355097. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/AUMEV2265202.