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 0x3f26820fd6c5219e7c11ddcbede890adc73c26a97ffd7cfe4727e10c10e8dcff. 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/b39f3551-93b4-418c-baf7-ba72a9199040.json and https://artists.proofprofile.net/proofs/artist/b39f3551-93b4-418c-baf7-ba72a9199040.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 0xe6c26758e4b713ca8ebfd569ca43d6cda39a67f9e78961ed32a0940244eb4904. 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/QZHN91989012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fae00cb56026b68b0b7e66adfa37eaac98ff4809749d83594ab3ae35eb92ece. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/QZDA71998264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72de909a46d46c1fcedd7588497055a13a3d27d60005e33a2155672136189e1. 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/CZA161850628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a229d58ad8a4297b4c5784f032e2218784033db97cd6fe612c3055c227fa6d. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/CZA161850629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a35abf1de2d7ddeb3e81918bfc254e7e6012fa8f5691f5df7c3fc82e5bd9d6. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/CZA161850630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3743781284b03f0428b65b2e049c1307b54e890239151cc9989adfa5f907c9. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/CZA161850636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856d7557119c9479d3c797119b1bdd97fa09ec02e6dc77ce925cbbab0df5dca9. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/CZA161850637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4ae1a0bc965217482525ca631fb099edbf04a6cce46a99a3e24aaab5376f7d. 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/CZA161850639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782b7e1fa53be2a07dbfb273963b1554cbf7c4130bac91a0edc3875296ee68c8. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/CZA161850642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0ff6d42aa5032e83ebec226347e8788633b6f6639ccf1f1392c2b404c3f41f. 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/CZA161850643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4da95ddda92eb66e957f910185c15e47f83b15269839bb0d2b2f84502d6c98. 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/CZM072205001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7297edf8e39b6ed72c3de3f5244b9b9aaade3991d7cfb87a5bc18fda7efe7c. 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/CZM072205002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996daf84b78a36288b9b6010b326c55b8f6164e5f09606fb91375dc63a97d0de. 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/CZM072205003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbc2cfa33d53db0aca50610e2a0c84fd8b7b665e61e6c16cf2c54a8bf60dec7. 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/CZM072205004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae80827b5a25814a12df4f7e9b97005efb1cc7866d66417e32c9379a2f40673. 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/CZM072205005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271cdc9d1c5d8ccebdb97f92bc04b51b147ff218b28e36fe7b765970b06a8d4e. 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/CZM072205006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d8438d727f4b564117735d24d74f3b55dbf6c7798763264da7cf7cc5b7be4c. 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/CZM072205007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16611165602e697e417759a8a3d8f3498e94acfba4ec190de74191f8db88741. 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/CZM072205008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41bf2e8c9702e78028d80441cc195bd5a1194273c9ee76b261c4fa7fa3161a7. 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/CZM072205009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e70c3c6f9ebac3e8d4225c689329c9312c086ced45a67a07e2df64b47d429a8. 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/CZM072205010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1495846f2bde440c1817b893b7684703b1434b03ad328ccce1416860a55f7610. 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/CZM072205011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db31b5ca1099fe8fa31da003b6eeab3c8b40855c57b490789e7c4c8fd7ba8b3. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/CZM072205012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e694568cf12a52650017c5935eaedfe3da8b7f31547693d3cb2e2e757c266e. 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/CZM072205013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc316db8a8b241da083d2bf0f86de2e737088b87250c818c4fd5f8d1751df3ba. 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/CZM072205014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c6e37d091cd8a0ee5fcc5137da3c068489075803f5525363adf12454734cff. 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/CZM072300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b9cb14e24ee484c77014879b84b8a2adf6cbadde24def21762c35ba85b6253. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/CZM072300005.
The Rains of Castamere (From "Game of Thrones")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac62f3c28a3ed41543b1fbfba95b2d15c5e4f5db1d423b5c380f9743bc37292b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/CZM072300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81dab83d5fa293ec9f11e79f00a7e10ff50b6d68d0c569a986415a46d84b645b. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/CZM072300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434617970fb08ec2185d0b003b58bb113c6e2afeac09b6688886cf2b916971c4. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/CZM072400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5830a1461542facbb6aa4962fe846e81e08a23ec5716ec4f2d2a9b11e8f477. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/CZM072400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae1c8f710d1768935f8c28b2b649fcf733032bcc6c74f716bd0214df85456e3. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/CZM072400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ce1064f7093a9fb38e7448e4e0fa43a38e6e37f6f4d0bdeaa9d985718dbf7d. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/CZM072500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1778408701303aa761c13af1944238f13c32ae1089e8c7fe5090f699319ada8d. 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/CZM072500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af4cf63aa4291645b7eb9bb57aac21ea96482e054a8dc960374c36ffc2ece43. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/CZM072500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb150c7f8c16ef6aa931fd792128459c3cb9cc1352d744d060ba2043720420f6f. 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/CZM072500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0e0e4a2a1c8928ff08c8bd4a2d16e8d247ade9f9126d26c42791f8b50a120b. 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/CZM072500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbd0f429033717a254c6d034ac57b38d6500473da6699a8cdf0ec0e9f83808e. 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/CZM072500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3effe01eea82985bf60ca9cd05e0359fed989b2a1ffa73b1109afb36f3f024. 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/CZM072210001.