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 0x45575ce4d1231ce18d6a9d822b40d2e0a02287bd5134003debe2c48fb63dcd74. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ba2cdb3-c32b-418c-9980-b1edc8c65507.json and https://artists.proofprofile.net/proofs/artist/4ba2cdb3-c32b-418c-9980-b1edc8c65507.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 0xa513accf5f808cd83e34cf96061bee2b2366bb181aa3278fa1c6cf8f11bae106. 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/SE6XY2236291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf517ac866d0833d4e666343bbfc6110618fbda7a482173d3fba69d983c3a75. 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/SE6XY2236292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bbe683391b1406d219acc78e82b58efd3debd6f7373d0a52bdc88f45f4b659. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/SE6XY2236301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba1d12873163c473583ccac0a4f5d35346912acbab1c7e6b448bb0353d18fd2. 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/SE6XY2236295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63affc1a98a7420480a37fe1f3ec9412eef0b9a1d6c9618a78a3036f811b2539. 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/SE6XY2236300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c2e6e63c185531e044fa004cfdb00c0ab9549a57962a2c25e8620986899567. 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/TCAFY2155285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0981822f381d18efe5729fef4e13e7858c9e0c2d3540b1a85b57885e0221e496. 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/TCAFS2180600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9a9d4c7dbe35744baf2b7b12ac574d6ea5bac9b064bba694e1a946e501be0d. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/TCAFZ2116536.
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 0xfdc67902fbe4e8df18684c45d051513950b27d40e2936952afc1d66de18ffcf8. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/SE6XY2236290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd33a59877c53cef5eef068a8a585acb2e927da55be2fa56f8449d9a6e8108b7. 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/SE6XY2234093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bd365f4bbadf2cddd1ca7aec2aa49cdc4b54f6efc7f0562f46c54153c39840. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/SE6XY2236294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac767f34bd92c8257afb66d09bf8ee90b93058793b13abae017e5af8a881d74. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCAGD2295930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83f9e7a1c8f5768f543488ff429fd8c7f52f64f8ee891c422e5b3309b998c45. 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/SE6XY2236299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114762b35d357a4aee5b2883600b3e675f7bb60c982fd83fe6214aba1b134fc2. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/SE6XY2236298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540be618c6f42b41dde4a455dcfb56590e94982dd159162aa621a8bf474dd000. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/SE6XY2236293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9a2ca22d21702a5e15eef615e3fe18cb633e85c1ae24bc9ce5ade9f1eb8f41. 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/TCAFB2009713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf687f845dca1c78003b39900b65e9dbd61c669fe02a694083062572d5d3c38e1. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCAFB2009004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4a1204649ac840a1c8471d41079cbb2c29d5f547fc11fa5a137a6ee882e569. 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/TCAFB2008975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fc3bbe49e4b0ada7f3ef6e1d5d5f78bf1126db9786f84b26e1c871e656df64. 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/TCAFB2009423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732546f2aa89786ccfd041dabdcd5e4b6d395cb6bfd4e90a27e50a20c8c850f1. 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/TCAFB2009494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6e3a30f12aca2092d9d9906608b9cd516001a5dafd6e2db7ff0ab5eae63a28. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/TCAFB2009482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d51b37b3b758f7b667ecb7d024ebc8c78e23d8059cdfc1e2d547d5badccd21. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/TCAFB2008900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd522bf2603b256232ab311582a2cdfeb42de5033760ee42925e440bed078dc9e. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/TCAFB2009385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919dae7e9b83734b0ff7b96ecc6fc82f57f4651604f7a7ccc65e6ff2b99ffd74. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/TCAFB2009758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397c8025cb6e2c2fe7b4881a45b62d521377a6f5f37f3f237dbe843c409bd94b. 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/TCAFB2009451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0a0d362f5b895557b568501a0d724e95ba204a5e13c56f8a2ec8f089f301cf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE6QE2351745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ebcedbbbe525e0ac0a2822ef4644c02a7d2eccb98c9cdb8f49c053f843628d. 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/TCAHD2336730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d21a2f40c5f30d825b8f1b2f15de4626b1d2b8a0c21395eb3b7a9668e1d28e8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAGX2396493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50f96e1205887c8875527841f3523ab57c80cccea4fa5a9fee748133be40ba4. 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/SE6XY2235659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b3fe2e7210a4bd4201c3805a038f0e0d7177b1dfff80b6dabe4333f20905c0. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/TCAFR2177548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb164a675710f15d2e61dba528483c8b340bc75caa1718dd86995a3f54bbd1599. 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/TCAER2080927.