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 0x7cc807c2f65aad4a453a7b65d508491e4cba54159595336a5a1b2af7ed3c6937. 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/c9a6f96a-9f28-40ae-b380-0f35e798ca26.json and https://artists.proofprofile.net/proofs/artist/c9a6f96a-9f28-40ae-b380-0f35e798ca26.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 0xe425f4c204d5a3bbe3412e5c047cae783ff3269768e991878ee3d215c29993de. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAEJ1982817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c11f41d4bf3cef7936efc4d5da8d6e9a4b4ad2489193bb2799880404179cb8. 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/TCAEJ1982716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e356749f07d7ff75987c7fe5ba21a6a11767779296ad2da79568a12751c04a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAFA2007476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea2e7f17dbf3036ffd59122e98d6abda6cc21bd3a2838424e32a06b8a05d8cb. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/TCAFG2018473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31a79f7258f6bbfaa14d18fcdfe225725fbd343800623799c09060315b1e46a. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAFG2018524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f54bc795b34d2d3cddfeb2159e280d1f0737e6f924104f6fe7d7cdf346ac4e6. 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/TCAFG2018559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f465126a45dacd4020c5f17439b003a768c73f57eeab2eb3ed432c713e91e24. 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/TCAFG2018622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81711bdb5eaf125bc932d94e7faff6ad71be93234b495a5214ddf7d93e200cb3. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/TCAFG2018668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13052b011af43552fd25c6412959b2e7f85a3f80b93bdbbc170037fbe2f7e49a. 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/TCAEZ2023172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31db94ca5ae3196e11968477545f7ff69d0e764d959ba0a6c45e75f2bbc988fc. 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/TCAFB2020790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70551b56659eb8eeab47f12effd38437ae0613f24463bba34ec52243a2665266. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/TCAFD2069627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8848c038ab515aa94de279a2f717f25f81fac0150364c4696efbe604dea002. 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/TCAFF2055705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa466924f31703b5a588d50e05e7bef9d2f115bddc90126e8756eccd8246fe5eb. 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/TCAFW2199720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa45e2299599951a6d44b99071a71ea79dc24ad5665364cd01833ad769819b1. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/TCAGI2262375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e3ad8c7550b2656b0894f963817800b4103375fc454f5316ab3f692aa07872. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAGK2235614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93a15c35db2970fe968d24ebc9210147577a387d86a58e89dd89d666ece74bd. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCAGP2244689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cf1c91be4532cbc1c643ca837b4643767bed28d3c6bf9eb48fb0c0ea772c22. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/TCAHG2305741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e381c13abf941c0aff0a2298669fc64e9271357dbf8eb739378e93e0d603b9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAHH2365566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde945b823bfb00a6d38b2d6fea3a96f966ad0b9ffb5c0bebc1227376f80a94bf. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAHN2358134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0536e1687377053d3d49fa14d135724671e4291a1879077d957e60fc413075e7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/TCAHS2377684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c96d621a77831374e036b65a9fc42f546b3ad782a7b9338a32a3bdec8847941. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCAHS2377734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fe0508aa08d3a11616cafe7deb41d719cc90d01becdc1dba3ac9a28cc291b0. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/TCAHS2377755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02560fc7cab332f7e6c6be3bcec4e45801d13f79000ebe07d4923088114ad4c4. 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/TCAIB2493829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe07bb13cdc8fde0f172c0037a600b98c7862093974762ae0485ccfeb657662. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/TCAIF2417622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578571f2f6fc4805e1e7780c20c95820d848fe8a3045879269743f8e72a1998e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAII2440019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113ef99a766cdb955e70071b5f1613293f3096bb116777eca6b833fcb0ac51d7. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/TCAIN2427320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb62a92998f49e0d4d0958d73f55c7638c3ad60acf875523f6f8971abf1a0a9e. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/TCAIS2435981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7353924c4c5a252406b1f256ef08471b3264872d7f48abdeb662b57d4b86998b. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/TCAIS2440181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe951547cd520e9bb997e5d822e297aff8e7b25876ad2c7ba130d65bd069b509c. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/TCAIT2440191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ea5cdcbf27a943f0c0df9684b064ea79cd5ba718bf50d71c87536878ee3069. 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/TCAIT2423209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e6e771936692536d72f9947e038446f9f0fc4af68f17aa77c8aea7aa771d27. 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/TCAJG2571489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79b956ef08faf2a36024d6a59beef3cfa026ab47f1085e53ed94e14bed8e3d5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJO2556697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd805b91c81e4bd69b697144d74d9f0cce92cf0bcd44c0e07678f11b720e56554. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZNJV2533349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0045565b671ddeb51332c29cd25c11bf29808cf02322f114b5aa258f9f6199d9. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCAJQ2588306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a14c21aca995edc47ffb965e511b19284cc5dbda7580ab84adf01e5681c6be7. 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/TCAJT2555950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16f04211009b3979aacbd0189340e5dfe0eadd78f3610dabc265acfd1c54865. 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/QZZ7Q2535501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05517f822265f1772d6bcd3f7e4d927e8c406ecf4c415668ca66ed9b63641a9. 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/QT65Y2514017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727ff024cae4294e7ee1e2178875d9f8b49f2d8f30068f1cbdf82d8470ec3619. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QT65Z2541710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63bc5878f6ae5c019836a98ee2c0160c65696f9133a084fb4d2e5f9f195a3a1. 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/QZNWQ2196417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbba91f69c4b6674afab0de964ad6ad6c689a4186c9d6a02dbe93b75fd51badc. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZNWQ2196418.