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 0x5f04ba767be72a6f22dafda73a6f8e5af5df62d6279c8024599b2f8929ea4598. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d29e7d14-c872-4c75-97be-575d22c3bd29.json and https://artists.proofprofile.net/proofs/artist/d29e7d14-c872-4c75-97be-575d22c3bd29.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 0x5dc3222ec3b412c5a9c595645bd22a56ed20b88317995409b3b1e6924057bc0f. 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/US3DF2210115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612d396e9d5b014c7e0b1ebb40a9b78f0c9588c1d6e2e7aa98e3a494aaa07fc4. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:37:24Z), 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/US3DF2220689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72fec2624ace45ee552e88275747e6c4075adc025d4c4c3b766dd406a33881d. 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/QM4TW2280679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaecd803b24739bb90e3db0fa1905244dbb82bb38348c3764fe4e9f6235bd1d1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM6N22247327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82678cade5efb87af0acada29da5c08b0a0db561bbd0684e42c274c241c3d0b0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QM6N22247328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729877d2a14bece5cab58d43bafed47081d0f7db21a6e32d59b9d747ff18163c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM6N22247329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e113792be4f1020873b92163d0014b5507f157e10071d568087d37402b3fd01. 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/QM6N22247330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7817e4002fe9fae2ff8f1f83725904d80872396a98e483de6a6a7e3747bc0ad. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:28:30Z), 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/QM6N22247331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf4d6fb869c8af02ba47802547e5fb3b80dcd807165dd191a0886f491fb77bc. 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/QZN882252160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8624b0c7ecf41cdfba2b374398fb70947f78febf56d950014e1b7c81ce8972. 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/US3DF2469834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44162e12b1a466097de2ea66c63384287e1f3c8bd6109f9908cf7c9b5db1297. 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/US3DF2490395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d2ae57345cb1222bb90c847173ff5c3cd8524c6a5fa1c9b5e90b49c119ca90. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/USANG2408588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdceec03a5199a870b9e7bfcc1c17ed707cf13684a6dcfbf7c0cdb89f8667dda. 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/USANG2405493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0065ee04263f292576e6339da5a6d7f868f72a141e4c6dc271d3611b3ead5e6f. 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/USANG2415422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fbcc3ef71bc57466f2a2cb4dc8713c2bc7a281a0a24c348facd2c67dcdf6f8. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/UKZGC2406392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337658cca2702992d35da1a789c7e45b676bf2e5467a1f46e513954aadf2030a. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USANG2479298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bdd37d65378dfa519943b9bda77d4030b398318ce8269ffac01434655478bd. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QM3DF2409298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cba90224f5d588c5e859b2a0766a1e6664b50c103ff975e4cb6dca39c727538. 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/UKZGC2500339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96eb95b5bbcd0e936d1a596390c15eb06fd88e49b7c4c8af5838d395eb210b3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US3DF2506742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed7d9eee01a400317227a6310a10dd52fcc3f74fe464bad0489d8e6fa9b9844. 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/US3DF2520384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd846c694032fce60a3f6a1f20920d712ac9b66d00082c302a9929d74dcb45ff4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/US3DF2514899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6547eda6623545e1161e098b0fcdb1bca055690601a8b031ee576ac3e0af0085. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US3DF2564631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c538dd8f700a676c29d42fb2fda2bba6895f5258986e33b1c096591f00f1315. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/UKZGC2505147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c023947591d9780732bbda69e9aa8f244a7b9f54e0e39f5d237883666eada0. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/US3DF2586285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed76c44bff3ae51d34bb0785d94179cebbbaf3b68c2ef8da831cdc6112bd581. 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/GXESV2574400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b410e3897141f8c85251d702023d3e4d8713912ba1b849592ee4dcb381b28cc. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:23:36Z), 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/GXF972522170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0065ee04263f292576e6339da5a6d7f868f72a141e4c6dc271d3611b3ead5e6f. 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/USANG2415422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc45a5d4958b942fee2d462733270792bcc8e3b654544365b036374a826ad777. 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/QM4TW2284318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f4c7515c3baa7485824a2b0c34e4c08cbf3a29cfb5353b66d19d175e999470. 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/QM4TW2284320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc82081f1f6382ec3ee951686642cd662749ba2450aff51e626609e9c5104e78. 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/QM4TW2284321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d9a74298f953abe3bbdf419365ddbd59e8336c1b949c6270654a92e9aabadb. 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/QM4TW2284323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ef18b8459406aab9be784641a71982bdad55e014904b0941790553727bb971. 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/QM4TW2284324.