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 0xa9cdfe04826d3ea8c7c182d3c949bae8be1b889fea9556e7e534db0b1368e877. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/354c6d6e-94c2-4c96-bdac-5961311fe9c3.json and https://artists.proofprofile.net/proofs/artist/354c6d6e-94c2-4c96-bdac-5961311fe9c3.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 0x11e51e8687db07a822251c71af096df263fe4da5a8aa063b2ddc5bd5f6c24969. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHZ52109405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc367693472bb21d7068f053ce861bf30ed8282fb3d6962b71b80ba9e078602. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHZ52109408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029f9af0fa30e7137de905e830b6eb34d0f899f477175a164b233b0864a21a1f. 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/QZHZ52109410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b347de15f21ac759913f050fa3949e81e77bd65139869510d81d931c5559e9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHZ52109413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911b4eec3603afbc3e7c7a23497bc57976924eef052043431c4145ff530fe8a0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHZ52109414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b2f550c7d02c9abdf95a76fd6210c995286e7639a7beea553d910e143f8424. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHZ52109415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289509a1407bca04bd0bf2bb42f441912afc1ad1ced6497e1685e4268b9846b5. 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/QZHZ52109416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe42eab6828615507a322e335a5258d4f2f6c4f2e4f4f330054c9c555f84763d. 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/QZHZ52109417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5943bcc1b2bee04b693155d38f136cbf1f34f1cf7fd517d43b7e8bf1d661467. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHZ52109419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4356714f11b9072236a1dc6f5974b2b2624d3453408b2b1bd03a400919cc745. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZHZ52109422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404d0a1710b8dcd4b13257427c4fe838dda7a7293937b8e37b31a0a2716e00ff. 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/BRNFN2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47501019144cc1b8c82e5f38019a7efda32054c746f973a2f071caf540d59e19. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BRNFN2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95f591199f572ab3771c6533b773df4270697f2f5b3c411d399755f15989963. 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/BRNFN2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68431d8ed2b07076777cf49422e9e69e9d411197fb451b51607567ade445922. 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/BRNFN2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa384c50bb2ad40930d2513779497de2083c7905d4d6e1bc29ddf0cbdb74b85e5. 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/BRNFN2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e195130440310acf48ca5f1884add68cff6d98fa57a15e20e5fe861a300f5e. 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/BRNFN2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf324fcda250f1794c4bbc2565000f08622814704d99028939874c5a2b7ae6ed5. 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/BRNFN2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eaa627ce5013a979640b2ce43cf8853d0eede52428f7cb28d0865b214ea4387. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/BRNFN2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb5a8527759caf9befa1ebd3652316184f0b4d7439ceb17f16ac37ecbc3c72c. 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/BRNFN2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ad40760926047ee974795bfd91797d1c7db67bd67eebdf508ecefa7e6649ed. 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/BRNFN2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42206642a4f3500108beeb7a5e26e40b05424b0a3e8dd2270904a1c6c3123273. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/BRNFN2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58328c7ce4bf90dcd73594569e9fe5d2a5da3fff21672c224d9742f78d40b88d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:02:11Z), 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/BRNFN2200014.
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 0x81a8cfbff1ab3319323d7e334461d8188f0523b29e2e49098ab4e67df71e5ddf. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/BRNFN2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e441f95e1c287568749b5718c50f1e689d5ca9495ec6e110da113dd36f3190. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BRNFN2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ca1bfaef1a1681a79d74856d254e391101c1ddc93b64b04349e8fcec0f7331. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/BRNFN2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1338b8e0bf96ebb297f19f67b45465e52de2327fcf5b1f14fc5c46ef0ba31d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BRNFN2200016.