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 0x6219b23b2bf0b65e81f3015a6320760b3aafb647ebaefd41948de4295a44c85c. 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/91f20610-a713-4b16-8c80-7fb76d883263.json and https://artists.proofprofile.net/proofs/artist/91f20610-a713-4b16-8c80-7fb76d883263.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 0x3973603d13dfcc36584afd79fed08364b12594602a4734e94e2a6259c74d3b23. 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/QZFZ72192121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dd991a74f988b95c423d5be843174e0decb96cdd396f4fdd38cf458994addf. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZFZ72192122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d4c47a37c70c0d09535cf9a33297a5fd154647086ebe5b85ff257eff524465. 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/QZFZ72192123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1797f452099d181c3cba4894e9460da9028a5764aa1fa75ba63ec9aa16f4e1. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZFZ72192124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ce8f9b40117c66cd606c2459101de8516d316064a16ce16eb8df08d5f76123. 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/QZFZ72192125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1d213c07afe86f0b0f733f65750da8e409c1bdc4cad56c516ad9cf49c7e78b. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:34:22Z), 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/QZFZ72192126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c216557417642ef7e28ccdfdcf791de7d00100d68f3d0838144412e75260869. 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/QZMEM2139739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce06e01132c3e5b8a2a7e3ce3b9a2e8c9fdca7da9b09dd12f1c2a4ea292b2212. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZMEM2139740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563a2dbac3b64cbd347d842d1ef535ca9ea3e1cc0e90a0a683ffc72924359ce0. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZMEM2139741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2915a4e423e05a72a7abe3871108dd594a726a31cc828c46e7d51c7aa262247. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:46:43Z), 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/QZMEM2139742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545eb27cde8c60352445e78dfb574c46cdd14ccc3ccce4297783b1f76dcd7a74. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:11:17Z), 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/QZMEM2139752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dfa07b7cf8fce9f851a4a593c2654d703465f7928e503352ab105fd2b69953. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMEM2139755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20766913591cff61d5ea447193f856d7490b78493fb0e7f077b62768c2dea394. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:55:39Z), 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/QZES52297094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34363b3d09017dafb7fe80898b56594dfd73ab68d0934e6ac31d1e2733784cff. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:01:33Z), 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/QZFYX2369940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb231cbd9a2645067cbd3d227a70ca9adb71114a2de35751cb7921e19227ed1d0. 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/QZK6N2311768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437124602695e680fa14402820384a8a3d5dd05cd8f6b132615df8ac5893c1bd. 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/QZK6N2311769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6026dbe055b11b065c7519b002b121074afe8c91637884f87120b413d5a52684. 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/QZMEP2379025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddd8509a03f9bae8dd9d8b24b195f6a139d1868ca27d197730c8f2e79debbc5. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:46:31Z), 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/QZWFQ2365585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185e458f15edc7677cd799cc708810b87cf8ac39e7fd54f84d215d09b9238cbd. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZWFQ2365590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a99eceae36d4a3ea4ffd44dcb4525f5363507c9b93b6c39e6a9ca63d6f18b38. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:49:46Z), 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/QZWFQ2365591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d192347dd31f378ed3b3066e908c3bd02bbfcf37c0a9dade143ea431886b88. 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/QZWFQ2365593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bfbb3cec9e2c1f25da9a8d01ac3e0b5cb72a35e0f6d57f207c9f8c3d9afed5. 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/QZWFQ2365594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316ca1414c88032b4ea30bc0619504bc223ef964a5bdd4b6080ef463de3e1cd2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFQ2365595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29400e64c95b97cf86dc853b55b4f09dd3982322187c7e8656a93d7065c848e. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZWFQ2365596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9579a108be65d9f6f41fe21c302c0e5345f657508b8c99a532c2dfe9130aee35. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZTAX2472086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb951cad6e78a009d026815a7eb36e14e7edfbc9df11c9228468653e9832da342. 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/QZTAX2472087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac92e98e646ba7032860cc012f2d243c92495a54c815560acfb3cb646c605cc9. 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/QZTAX2472088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973ef4110af43318811185cc32b3999866e6f8cc0f1a2a885722b772f78e7b0e. 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/QZTAX2472089.