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 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 0x8be7fe60e49385ff5f69b0d6c5d80162dadb2d79e0a068a77ba2a97a6b2b3916. 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/13a00726-7acd-4ed8-a5f3-8e29596370e5.json and https://artists.proofprofile.net/proofs/artist/13a00726-7acd-4ed8-a5f3-8e29596370e5.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 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 0xf283050bc53b764b31480c85c63fc588e8aea8e5645bc0d53f8cce42ec5f45ab. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/ARA901600134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3104ca4ceaf8977f5ea01ca065ad39dc968b4f48399ae6674fa934d605e087. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ARA901600144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec216f8edf54d1ef40a8214efbfe7e4dc92a25f7303382d1b1546ca63a89d29. 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/ARA901600145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61f4595241e0119d43895505c9cc620a09c0b6e634f8085b6515e54c40af583. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/ARA901600146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4307587b459bac0bb044b120b99a3a25f5ee035b1b6acd20588cb2b3a37c174a. 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/ARA901600147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3dcc69673a010da7e28e53f3f1ad43193a639765f69c0b2285c9f41e4894ab. 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/ARA901600148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebf41b4b5987fbfc5ca67a52588e7920e56ac4bfc3731294461f300c569bfe2. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/ARA901600150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f4c28a4ca727474921369ce99f4178b20e82d6f723d296a12cd99c3f17bf41. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/ARA901600151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27e21dd6de7ccd18643b3fa8941a1d60c32cfb0ab0732fe1cb39d9dd9b49eb5. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ARA901600152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc1986649ccaa5c9aaa02891864b72f273b794efe572e2df7877560bd1aa705. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/ARA901600155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572b1df96f4421b8d3b9956fdd301beb020e11083baf71665c186dce8fbccd9b. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ARA901600156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9a76ae3d4f3c7565d2d64064a293e26ddfac0f760aba8fe74a5749e507745f. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/ARA901600157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3447a63a7a04d4d6cf7baebbb0f98e90b9533e9311175bd482f5141a292c0b. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/ARA901600160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88dbb8de16e0e4127b04a211b939540bed9f1fb5891aedaad12181a558fb7a75. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/ARA901600161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029bb47d20d1fd8eda9624456d066008e324b005beda9df498481caaa1482b16. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ARA901600174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918aea981873936675209deab0e01f1d5f06294d45dbe8b22e40b03286132331. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/ARA901600176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182bd357de5230906fb8704d2a83fde12e52dc4704f51c31b9afea72d777cf44. 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/ARA901600177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9547dbf518e34f5dca859b742fa3141e357d262e6ca05e215de2e54c5d1694. 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/ARA901600178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03812585b3da294cd870184afb0bb471e488deb595b10aaecee7bf4f2de6a1f1. 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/ARA901600180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98737b210323b379deb497363dbfae87616997fd54261c9179a5701fd02d613c. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/ARA901600181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3d82edb8799fdd382131725326a2968981482857dee544a73c6ae69e1a5e5a. 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/ARA901600182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d8d3ce747bacfe738bd9354c9f6eb8b653f2e0d7c5ee34c46acd50526c0974. 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/ARA901600183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca17dfadb2fc2d79bc8c3269e5b49f81a86cdc14a4457d800295a08517365cd1. 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/ARA901600184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cb202c2e509f81190fe618853b9082233a3e5011575f692b22791781c71c17. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/ARHXW2003318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3325de9207ec435f8d69f19337645db9f35fc7ef678b27d635b5d39a499a418. 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/ARHXW2203097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5a6697d3c029663e202952b6e1d5cb2eef631d4c440e7ab05911f01046bc1d. 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/ARHXW2203096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa675224da0cbc2118d94304165c5846e80a0a1d908cf2a9e897caf125cb4eff. 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/ARHXW2203095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7127cb5872518685b3af8933cd13dc47417d7572d5a82e7040f6dc77c30ad33b. 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/ARHXW2203098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618e20df2e38be65cb3826e6645fc72e5ce4ce92b56581faee6c3fcffb006117. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ARHXW2203099.