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 0xab006390c3ed4e6f336d2dbdc12296d3aa4b82b698d4e2f69feb698225364a51. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e79d4f0-06dc-4d08-beb2-ffec9e2869de.json and https://artists.proofprofile.net/proofs/artist/1e79d4f0-06dc-4d08-beb2-ffec9e2869de.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 0x730e098c9c457a162c03b35ffac55c40c60fbb8d48b58c7db036763b1ab0307f. 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/ARA250700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf943438cc4e44bb25d7739bd8ce187a2d851744360f4dd59586a9c410aba85ed. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/ARA250700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284b0dbc804d5b5cd9b45e26132b432f6a0fb15bfe30367ff823087872a93c21. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/ARA250700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a280b824984455e9e06f34a2f8110dfaa1794492c49bd2b54efb333f45d7ec. 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/ARA250700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5413e8b25c2b82b81e0707c36e0d0b2bea9e1dd83bdcdb2c8c59d89eec7404. 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/ARA250700046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc9284d70df19b2c11d316f9c8976314a4a5e291f36967af4b55fe8b5ff30fc. 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/ARA250700047.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730e098c9c457a162c03b35ffac55c40c60fbb8d48b58c7db036763b1ab0307f. 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/ARA250700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d5ae980e8f5bb64a5b0dd1070b67fb28fffddb11fd2c2a675a20620dccdeaa. 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/ARA250500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5413e8b25c2b82b81e0707c36e0d0b2bea9e1dd83bdcdb2c8c59d89eec7404. 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/ARA250700046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b536e4f7772b423078311cef56d706a73820ccb311203c6db0c75ce1fcfd17. 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/ARA250700045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f58bcc50026719d90b787408691c3e77ed6b3d27d86ac693bd5300a3e8c08c3. 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/ARA250700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397f108ab47c15e640edad18b4650e2808f53001a3f0107882605fc7edcf9896. 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/ARA250500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8217df7e703ffd49ec4f2170f629e5ea136e3eaa09d249e00d76f0a440850113. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/ARA250700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201033ebf5f3b4f2d4417ef52b28f586591de7f634ca86790900f15e05909864. 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/ARF050900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c6bf66d26d24d5239b8b068406778d281fde85b21ca3dc891b55b5d3e8b8aa. 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/ARA250700043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa452a8aa26e5a53cd9083a7c231621607b7071257bba9fabefdbc4ac6ea43b90. 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/ARA250500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cc508a660eae587c52fbf5c0db0808bc27ac2d8cd7263a60f52e6ef4055673. 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/ARA250700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a280b824984455e9e06f34a2f8110dfaa1794492c49bd2b54efb333f45d7ec. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/ARA250700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa780450ea4829c7cd1b1becb91e59fcef6b3b6b5084ba7a4853794b7285d53f7. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ARA250700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284b0dbc804d5b5cd9b45e26132b432f6a0fb15bfe30367ff823087872a93c21. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ARA250700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef89d8da7605d3d08c715c30f888e454d03d8d5743ac9b267ad6f3d267b7ecb. 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/ARA250700033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f213541e9c4f4da4117775415f299c7ed2a5b0c0d529d232a95d4cff7f5bf33. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/ARA250700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3332af0d9f61b8e73405ea72bb0bf09b18efcb82b45eff713351d6b2275bede4. 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/ARF050900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d75750f21cefc1d2540454c4dec13d310c43487c21752fd38746c347bae4b5. 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/ARA250700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5572102edceb342cf6d934e19380c9a20f527b26ae54692152b1638b53f552. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ARA250500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351bb4447e105f0113cfcea846b4d68552aac82ee47f66fee8688f3330f43ecb. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ARA250700041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea9fee8280a2cd5eee5f872538c1713fcdf6ed32eebc580163db16a52849df3. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ARF050900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5eb83572675873126855bd9ffe0bbe55169b6753bd16870711a5779c99de19. 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/ARF050500319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0153336a1dd345fb40a85797fd6476417b1dd211da7c76d0e3c815a1a1b30c5e. 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/ARF050900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68f1364a6ac305bfa5722232a2122cddb363691a2e43fddc50e42b4a0e9c3b5. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ARF050500315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4feba7a51dfb5178e444137610f35b470ccdd3505d48ed8809618fbc5f559568. 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/ARF050500318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb951fb1f41e297c4cb1957c0d7b7fdb49d849201d55e512d0dd60cd1fb14b7af. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ARF050500320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7db03695c8e666426eda37179ec8fa9d97caa6dbfc5969259e142914a58af39. 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/ARA250700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf809029abf1487abf7eb6c362259ed6221d60c357352962af48d68ea4382812. 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/ARF050900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad190cb50b5367c6f090e69b359aaa563e16c4be5614c5953cbe73c514998a8d. 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/ARF050900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188825bd024eb57e4be31c2aaceefc108962caba1fe79d51d80c40e305201d16. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ARF050900026.