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 0x8488703c784a86f8c25162957cdef73c271faefd2257239af9d9b7fe94f991b5. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79b6d2aa-8213-452d-a51c-bd5b8985fd54.json and https://artists.proofprofile.net/proofs/artist/79b6d2aa-8213-452d-a51c-bd5b8985fd54.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 0xff7db89ff42a82e87792f337baf28afd9ea5e3e3f65e4ffd6073886bfd7a3358. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM92162726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f80489c0a6c6aac11a306958a36b1c8a05890c029e10be8ab615abf051d4c46. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM92162727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e34cda717812d7e3c6514444d85ea6baf09bb5da6a99a2ca822d934bf1fd1ee. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USHM92162728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8167cf2835f7d7cb54a8048a717798756887d1aff548c9ca909720dba2073d7f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM92162730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c2403d3aa15ff1655da1dbccb34de4a965f2c4e5530a27b4b8cbf1f865ceba. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USHM92162731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19732e61f51c8f569ab7152d06483467158d99f56c5fc4391731c8f70dd4818c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USHM92162729.
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 0x8da163c4e03696781f1583eae2507539e829c22b3e6ed92b72aa4ffa18dcef08. 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/USHM21814147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc98fc26d87ee0ec641f6f7c68b4687b9dea8e22d28a7b84e30155bc74467dc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM21814153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89e42b093a890cf9815fc7c165d85d52494f0ad2148153cfb84caec95716fb3. 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/USHM21814155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ff5b6379a3667b1920c6876569507640121d3c8670552ddb04754e7db869f3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM21814156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8c83e87e0f8d1ab0e109719130dd4601c821b3ffcaf163a633fecbc48de8c0. 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/USHM21814146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afb37711e317104f83b3e08d96c2003920defcaa5347eb28fff76cc9eccfd46. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USHM21814154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687faea90f8726288a1a18468f068b1d0c4ec4165897788fdc9b8b3f1f4de284. 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/USCGJ1274065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9adfdf8d49a70c8b397b8e67d7918db5fc29f6f124b0101300b02deee1fcb7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGJ1274067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1192997f1a15897f84341adb332d1bd45a1216d8d3acf7013984a7f6f2bf6b2. 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/USCGJ1274068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3edc41477f6d8445c50e6e1ce1c97e556025e2ad091c8c1043cf0a1d29c0bc. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/USCGJ1274070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6eab0f1fea9ecff7249ae5113950eb2d3a95fd67a9344c2b1f443fe2f65f144. 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/USCGJ1274079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6db1fe8ac90c94d91f3e5fb84e7fd6a77cbfdb267e46551d2f62fef9696ccd. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USCGJ1274066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d1c3cd09c167c96400a2b0dbaab6bbe207a89a1f4af8ae47cd862281110507. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USCGJ1274069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb003f34610d20db9090d4cb0099c2b5d91af3fc12f89964405b6d8b26a7be4a2. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USCGJ1274071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43ca65088c3e520e5d70fac4e1a0228a6f0b665cc40322903c22aab2a86dbc0. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USCGJ1274073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa951b02cf7be4c100de6c0bdb9303aa63afe5922cbbe440149cf484316517199. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USCGJ1274074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67070c0dca0db9a6ad1ba05445b55f6e68908d28da259b4ee02bd5a65d6d00b. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USCGJ1274075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2008eb928203c1ae9a1ebeb03247bc06fb4881e9cdc21a99807d5a239e9a3f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USCGJ1274076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff0d3543d767799e3f522a9387b5882021981d8c61216eb44dde33345a3c5ea. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USCGJ1274077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4ee3724534dbc6060d526118b449152f1688d6bfc9ecd4ce5dd693627cc2c3. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USCGJ1274080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8238f870b899e24a0cda75b3558604ba27d7fbb479d8fe8664c82ddad48610. 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/QZAKB2405577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb762fa3ed2a476202c95aa3a646de2cf68e9687400451a1064e4d17f38ee74b7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USQY51530105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff232f187766b17cfc4463ad57d36752274917b5ae14af2c007f3f8c296374a8. 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/USQY51530106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0eb8d0b37e874c241959a4d82f58484109816c5df83536c6865bb59c3c3487. 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/USQY51530107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a3c2a120b5aa72423d3a4d7c63d8e7386f7a5f2bfa207b2656f6bd48a8f6a5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USQY51530109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696d7f483d5e2b859a2adbb0f487fe8effec89b9a928e432b89bf2b1aaff8989. 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/USQY51530110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53470db07834f976da11329e7c3013ad6f553cc227951f4ebfec5bf3c5dc8df5. 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/USQY51530111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98873fa350d8861ed767240bdd52d6f7a1ee1689916bcdee487a40db8d271eaf. 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/USQY51530112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1002e05f7d9a0280b46bc12ef8c5810876535f0bb5aa1bfada8d60402cb64e0. 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/USQY51530113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a4d1ae12ad75b7de545ce6eda05d7d2cd4f6d6c6ec1d87f39e3f284aee8155. 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/USQY51530114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbed7d1e3869300eef8eae977e40aa8f8dd932c404f62e2dd5965280941e8a7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USQY51530115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f77516dece945adcf6c819021f181da3d13089976e51a843799a5a6a8143d2. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USQY51530116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac683763260cacc41b8af9d679e3d9aa1575d0d43bb0a56513f1d12e40e2288. 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/USA2P0609588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9791cf495ac28b4589355ba652909118ab6048562df7bdeb029a9664d68d53. 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/USA2P0609590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cf52b489b113d790a07739939b6dfb417bfbd166b542c562f3b2a1e3f9e4d3. 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/USA2P0609598.