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 0x091184db319b3c128b96ad4954b7f9c63bafd6295f9750f7631c2cbc8733f1d1. 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/18c6686e-1ebe-4fd1-9b2a-9ba23f4c13a5.json and https://artists.proofprofile.net/proofs/artist/18c6686e-1ebe-4fd1-9b2a-9ba23f4c13a5.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 0x2d35cdfed0dee2b073dfc9782325e518c4479e4ea86ee2a2b4fa02d2b079a393. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNJY2111526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b8e783ac908a68532f0912d3273cedc05b48375b1f8bb72353fafa3bdb42dd. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZNJY2111066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29d9336e9df1c1403e00b19cd0c24ee530dc5eeb03876715fff34ba759f20c1. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZNJY2111070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda3556f1703077486b7e70aa48b857eb868a48beec92f9669907c62b22dbefd. 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/QZNJY2111071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e703baa31702e2e1cc155a981a0e5206690709f4f7e61165e2744a4c04af628. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZNJY2111072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b23731b2f84c9de6a71a7f565c786674142c0225e4263ae8c720e96cc3b842. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:51:48Z), 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/QZNJW2213441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83398f78617d8f214079d1c765e58af70a008d9a1dcddc97537746f403139ed3. 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/QZTPX2266834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0870af23107a0f5c1e17eede4be7752187dd785667107696bb7651a82ab2c5f6. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:05:58Z), 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/QZGLM2322725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e6c7727376eee8f1e341cf9105ffbb94b351893bd53c872a03249270651d29. 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/QZGLM2322719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7022569f4c63e40604abbc6793528ac42f38659aaeca064e009885ebb8299c19. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZMZ92348083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7699c7830eb3b9233c60e5e5e89be65fec962d2370095697e43fc788c6ec6b96. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNJY2366464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd934b46bec48b778c67ccc93752e4f93bc112b7f3f842a1cc5c1302a6b7b04b. 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/QZTVM2376340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfce3b80d76d712289d7d230635e54700968a4584013fb6c6aa4c4b6d367f1f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTVM2377206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5675a333ba26027a3bd63661795ec7d3fafd7e151fc7a05eeac63cc8372f7619. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZW9M2338538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951efaabfa3bbccdd9f8952801bfdae38440d543526245174e166c607a709239. 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/US7VG2445021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b495d4b49d2185a49a221dc79aee4bae2c34c495644aa0ce428ec50b9eb211. 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/US7VG2470050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd304722d390cad0fe219e16078ef5ddfceac9e8cfabe8d04229e6c5da23e1441. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZGLS2409679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4c678614c5e9f73b2495f1063e11519bc2e249f53a77baa8469cd5aa134001. 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/QZNJW2419954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b865bd5752a620bc967f487bbfe1a73c8f104f1ee4c2f92d78f0194a74b5ad. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNJW2419955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab56a61551b1c56fbaf339657007c8d5a5833d39494f6d88a1aaf3a4618e8f93. Chain 2 (Bitcoin): anchored in block 957596 (2026-07-11T18:43:56Z), 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/QZNJW2419952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfd8bf58696f2daeae23523a5d3869a501ae93b7ee70ea6bd2e19fb8fa57de7. 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/QZNJW2419953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbb1fb42ceb3c528648160bfec7d8eae1cc3bd90953b87b21ddb6bdf018456b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNJW2419950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d74bb2d0aaa1031777c6dd6b24252c73754162f9838beb2c8b01eafac32911. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZW9K2480189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113361cda539849b18c582f07da1426d6840b3ebdb241eee416b82bdbda7ca33. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZZ7R2453164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0dff04cc768407d7576cf88e5b90b786c8e270345509976c76f1a4fe66df34. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZZ7S2408792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9d42ce8a1bab4ded66a8bcd2ba2fe3933c069de233239a2d8f074416e8f0d3. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZHN32569723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd220a6e18a4a16b06b224fe1f57327bb88875d539924e20a7de292a39f5d05b5. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZZ7T2516706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2247d1d3c22e0df34c3b7e87447436788893b8d26064c3d324a80467eca67232. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZZ7T2516707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a9823ff0cd838fe6464794139a488ced2270f2878033aae0a4b38d6fd7fdb5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7T2516708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722dbfa602b5e8d680f30a3b529024638f54ecb8007533234ec2fbd24c6d48af. 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/QZZ7T2516709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1390922ca602fdd1b3ad68035c7bbe5799597e3eb6fff1dfaea038d4ed145c92. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZZ7T2516710.