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 0x14654f3ad15c30cca26339ad3ab7395285650af8dc942fd5d93196a1d3983b4e. 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/c93baafe-1d8f-4aa3-8f80-d2a43421e40f.json and https://artists.proofprofile.net/proofs/artist/c93baafe-1d8f-4aa3-8f80-d2a43421e40f.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 0xecf6a5e0709e73d2b2c0c5c2c86c84b9ef924f4f18665036df24edeabc8c1f6a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR10S1417740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561540de3f4e165a02330032b6b4c470289da74cc2b5ecf2e8e2945cdb604851. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/PTES10503703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e2d627dd13f8ab5ce015d6f59804ead0c848fd41ce75f543fa44fa63d89afb. Chain 2 (Bitcoin): anchored in block 957529 (2026-07-11T06:30:13Z), 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/PTES11104501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132b6f8b61acc33fc7a8db42f3f970619a54abb22e77e1accb2e9f96395b3141. 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/FRX761529422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb0d9fabbc04e59bb8af9666c1b1ee84454b3bede01fc204c0d4d5d1646b059. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FRX761529431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a074a28581923b670d25b792517d5e8a160282a7de8be24011c98446ad999d6. 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/FR2X41745745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f8f4212a344efbb6ba8c2fb15dcc0efd9e7da720083101bc1f152d0be1d03d. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FR2X41745749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86d8602ae90fa87ea9689d7ee859e8679ab411494b364155ac65c9f3f1b98cc. 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/FR2X41745753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8cc0cc39a9984ddd3b0b35c53894c29962c789bf3e08ac4dd44049d6dc2e38. 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/FR2X41745754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8823b53b9d0a6ea65c97d9f42ad627b169955c340f5368f37230507f45292c. 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/FR10S1903025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f560dc60905aa89c203ee3d440870ab8108a894729b24e193248f560d44d1b2. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/FR10S1903027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0e17055d835217e618cb3d6da4123d269f8809439744d745cf0b5cffe2ede9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR10S1953697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e40f1b0f8ab04909e596ef86a731367e2b5152b4b7a4fd2f0c8310b55e1b9f. 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/FR10S1953698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a92578ad148ca43592189ea3f01e868af3c590160e16503a95b730d1a33ee9. 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/FR10S1953699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0fb8b1ce6bd4dde3b4b0abff6e68efbaed83ce27f9c9350de8e6716c44322d. 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/FR10S1953700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b71b9fd6c5a786df6332fa4858ef52919aab4356e6c2660b5c7406b8e8011ec. 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/FR10S1953701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81db9aa1da3c486d75543369c9e579e06459449b2aea493e179ca5d3a0d3fd4. 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/FR10S1953702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cd6fb02c05ce69e0f45ec95521c22b7a5a7b9bbdfaec7dd940d39e3dce7070. 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/FR10S1953703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413ce607aaff031f8475fb460f6d91d9db0d603ff870392d9175b42d14797bed. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR10S1953705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8415392f58e6b21ed84e70325aacb7e83c7c221f23567877f56c2250c5f55e9b. 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/FR10S1953706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737baf07032bebeafde6eb4658544b00ee23558bb47c912316619d84f81947f0. 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/FR10S1953707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea4af019a94d3767469fffd26abd9246f2c410cb0b60310eb261f467f415f38. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FR10S1953708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3862f856d28bea80180b5c450f597bbfb02e3481bd08eba33581e892883896e1. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/PT2EO2000427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6051cf37ae8c39fe1dce1e7a3f47a360de513982b352ef273fc1bc94fddf9dc0. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/PTES12306101.