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 0x9a34a691c72bddbf8be7e797aa2377a1e7ed3e486fe5deb2b1dfe2c8023e1409. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b10d9c8-b967-4097-a0b6-95b4d36a9d47.json and https://artists.proofprofile.net/proofs/artist/5b10d9c8-b967-4097-a0b6-95b4d36a9d47.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 0x8e55b8277f3fbb31ffd3badff0e5c19b807ddc70b8fe7d9827383679ea2241c3. 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/QZW9L2316162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f20cca0337bec5867667f7242103ab0f8d89007570715863b14a8a9af771d39. 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/US7VG2431560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52699e70dda6a57f238fc4f88a08cf45258c1e00a4c3f5af0b8be006e4895932. 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/US7VG2431561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc245cfe834c97308fd223a4725bb15686c05ff8ebc97bb171bcc7c8586804cf0. 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/US7VG2431562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665eb298c2a1717aed97a3ff6df2ed43f9042b3cefc506e4187497d0c3302358. 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/US7VG2431563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2bc1a568f5129164473850ddfee16004ab4d5bd91b63aa936a969d35e1eeaa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG2431564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20109d65494ef24aad3609123543cbf363d66ed6fc0a9cb71497e891c3d45dc5. 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/US7VG2431565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c4a3b5ce2c5d55dec3fda648df659d286288f8eacf188cb56021a03dda9cb6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNJX2336158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9941b3167d26d6ff604591985e4c7e5fa84f11520aeb7fe667d92d8a6d2be1d. 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/US7VG2431566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcc2c8f6c17542d3474693b49e40f1deb3b24f94c330d748469f95091761136. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG2431567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8715607674487deae9a5537e0fd38237daf9061164cce3e39caf318cdf657d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US7VG2431568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c028e4c5c49e8207f7c5cb16f650717b44974dc45cc32ca88f52c1fa4ba5bc8. 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/US7VG2431569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af303a719d79e0ec0f9436926f0e5e8933f356fd411425558a91cd159c58e77. 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/US7VG2431570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91202a8cddcabd99af760b7ebd3f9491911f8adac56d41af9971afb28499f944. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZGLM2314240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14a82301148157d0dbed2d246e6be876bdac131c06cac1b2797ccc001bff7b8. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/US7VG2431571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21e59d9accf1479ec848b776106f206348a221e3a3bea004604f9cbc0a1101f. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/US7VG2431572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c587bb0ad2a5f4177c806e9f97b193c63171b13580b3b727b1cdcf4d9483044. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZW9N2241163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6eb6679ffe1e419aa10df43b192c3093b08eaf10e23f7e346451c0e11bf53a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US7VG2431573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d45adc6b3de25d96ddec5c26ba6660d788d249a1f57a751cf03738ac0ba052e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHZ42213776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792079d8b64fcbfd19ec99868c0dc4e26876021398fff4150863221747e56fc0. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZHZ32182575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30f89fb31e83d67ff5fcc4f318e387c78ebf2762a4502c2ad3ff3868eaa5045. 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/QZWFL2302676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda33d4ab12db3a6c63b990d1c82d8c19e1c376a115d13d2b2f297de5a1aa34ba. 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/QZWFL2302677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e55e674e8d1fb527e957121478fe6663378428fb41135c8df35ab05a2f162c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZWFL2302678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c12effb158b5f51378feeaf463e1b99a73d74ea61b68d4e3225191be0b15a7. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZWFL2302679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b420cd9ca2b528628caae47ce7229d9d05b3ab62a807bf0195df31a2463500. 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/QZWFL2302680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a3e327a9e9a7039fe3685adfcd6983fcb580235adc860852afd67b90f71048. 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/QZWFL2302681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c599699eea137003e0f3bf55009ff36fd5814df9161b833f8931fc47d077d49. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZWFL2302682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6973721ac4f9d5378ab2576da358b35772bcdb4412b3b8ad5c078b9c3bce658. 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/QZ5AB2412531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa594c2e97ada91bb02b156472d4c86f087ec93a49e3b0aed91f912fb85000a. 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/QZTPX2356964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c53e24fbb632783f3d923beedd94614875094618d39a2bae27f92c1931dd4e4. 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/QZW9K2443812.