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 0x1d76d86ac79ea92951d150e732ae99156210fa733131f7a9470b5dd9f1245acb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7956b91c-1868-44e0-8293-111dcacca2dc.json and https://artists.proofprofile.net/proofs/artist/7956b91c-1868-44e0-8293-111dcacca2dc.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 0x02d8c9a58e4a53f01b0dca3542f92b4123dfdcc749d48e2f788db5fa4414771c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USHM91816258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7783b2f8ab58c6f3b68cf6b146035eb7f99383fdc4852986a0fa175f520bff92. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USHM91816260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33164f1dc7c6196353885bf7f820d2607035b7bcd928ba86bc7cb84012d30618. 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/USHM91816265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3f8103c56c57ebdb9f965101f53fe0f2ea93836eaebb38d3894210a9562467. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:05:33Z), 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/USHM91816266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffc80694664c87772c10fada16fffb109e3cd440d22d6dc32146455eabe955a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/USHM91816269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e134cf7bc53d3775f5d39ef5274e5778d5180ade25a9dbd2fd08fd7bd80dc00. 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/USHM22011012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ab104d5809aab7deb0a1976466e09c292ed32cd1835a74aa1ede28ba6edc28. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:59:30Z), 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/USHM22011017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee75b9fef7e9e6e6436a4b4c6caa899d7d6190496bab2816464aee341e86f6b7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:52:06Z), 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/USHM22011018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3a465c2c356061cfaf6d8f3d74967ec58242edec9d58d417fedf57ec11da64. 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/TCAGB2213781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dd622786970aa2a6322373caf482a04b4041c416fd830762bf3573fc359e00. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USDY42271670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a147e0de16451c9aef06cf699607c8d7aef1b98176ee2f0c159d3af036a3c30. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/USHM82232198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6699a638a9767cdfa07dece9d3cb5f7ee839c544dc14d942924bc5cc30db0331. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:48:45Z), 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/USCGJ2393817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a8ee96d226312e876be4ffab6be50ee71e6765e61bb4b086a2f8a98f598e7a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDQH2377257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413352f09e39866c81afedabc679cc4ba354ff95adeffe14be1e9c0fad3388c8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJM2549811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bdf6456fd5fe3324b65e7c0ce62477301df9ddff0b2e486b4e6c264b6396c0. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/TCAJO2575330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0902cec61dfa4b0d5fa878dbb8b3dc8887b87d9596c70a83dac92cbfaaad5d0. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/TCAJQ2553787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209f3adc11e2718d67837c77eaf4505e11552993ed20c46cf39570b2801df879. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAJR2553796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a05bc59cca20e2e9288fbf50fcb5a68c6a163f60a48852f84a2e05b13a349d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAJQ2553865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea43413c540f06b03d1a84f4c1f96f2386befcfdd93c52e87ff1692ed7e0b378. 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/QMFME1905138.