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 0xe473c2341d76bba5d526be7f5b7fa386e5a8d7fa446b0851af91fa72cf33a138. 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/4e5ad59f-5a9a-4e71-acd0-a98edb0edf70.json and https://artists.proofprofile.net/proofs/artist/4e5ad59f-5a9a-4e71-acd0-a98edb0edf70.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 0x221bf26250f36d81324d530f0687909865cc3d975ed2ce8d43c3ba4693f85c00. 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/HKG732425328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580412bf892a5171a1ff9f19f4acacf72e039e3a55e0adce620068d53edcbcb8. 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/HKG732425330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571bcf665c33d3cfd1c044150dafc15778ae44535599536667c04097f7ce319d. 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/HKG732425334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9986ae0e805282595385a155a8415ec58dbfb089420a6856caf3af3a755b35. 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/HKG732425335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf066d65dc62642f7d4645be2bba45e50015ebb9f2334d3c301cf71b880449e6e. 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/HKG732425337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde99c9f746758dc36970588a3d20ff7bb54cb4a699bab500e2650f80ae68da32. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:25:48Z), 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/HKG732425329.
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 0x9884bb298ec77be270a931ec1fd5d58af418da3337074dc5a563ef51b00983ac. 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/HKG732425331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e7f7d7e2f749a07c30d89efc810caaefdd142d79640efc587b27069224ff26. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKG732425333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb382a83a897fa9242e07c365f39e0bd6527cbfb6ee42bd6cf52ab67ff39981. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/HKG732425336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451cbe12508a363d329daa38c285fe4aa025c5501576c353a857ded7f72cf413. 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/HKG732433882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a6d32e439c3d9232c58c8a6feae409b1afd13a5c10219492c34808abea629b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG732431848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ca5580098867d8c35f9d6a53831d61ea04957643d8b17eedcd8f3bc4fb0239. 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/HKG731657012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d3a30959b522b5efc38fd22436486014165b52871e8d8da78c2d4c82c544b2. 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/HKG731657013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1603eb2e83d17c35e24d8671c4b0df914ce49b456ddea931f4a34e89475098. 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/HKG731657014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa22aa4d11ba9cf9a27d43e43e9137984109f57f7bfe8487b3a79643c7d4faa. 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/HKG731657015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca797c4e3ead6ab113d9291ae5e8acae1cb67f8ffb987b7025fd722cc2986c64. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG731657016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094c2e9ebf58524480982e56fa89f1f1b93c4cfbce9a0e93ce72e236bb9e7a8f. 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/HKG732376982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ef048c6b4fd155323a77fae06770fbc0f30525301b04786bb5e36bfac8c31a. 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/HKG732373130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca616a1d6111f0526dcd66965c7f2fed566d80443c6e8edc228dedfeed43feaa. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HKG732373129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90708e6e045bbc2b38c9bb18de3ddcdc1c5f1bb137afaaebe15c6448e2e724b2. 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/DGA082291500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99529a8df3d22793c38347a028fd9d4e1da08efd4339548ae37ba1fd85a49082. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA082291501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61919e3536bb3414cd56f9895565e1feb17939477f131907c9cccd842bb07824. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DGA082291502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e8bb32087470e61b9201a7f2d0b4fbf0dfa1b0c9831e08243c055038aea566. 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/HKG732349522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714a57818f5792e7a6ad5f82e6fd7ad4da7a5fe682b885872af68c7231950e4a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG732349523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19f16c0639f1e3a6b49b79b97bb6cb5f9b79adc705cd75168f68063d20ce90f. 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/HKG732349524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae979f51749858d4f1edd55b562f146c2580ffa97b0c0c2999a6cf8d031014c. 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/HKG732349525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dea78bd7282c3c50b9b1c2af7e0695ea8a72fd2fb2f578744e89207076415ea. 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/HKG732349528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d2653a192acb9263be51d26cdec0fead3f7f1833dddd834c54bb1783d0b36b. 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/HKG732349529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56223b4aef2d05a62134f919ada49fbda47972ba1e2f08bbc4c09c6d43765fc5. 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/HKG732349530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b36928c3cd03df6569031c4cdae2a34288a7d6be2147e1da91410abbdf10aea. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKG732349531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ddcb1dc3b7fe3fc32d5aaa72502dbfc1cbf9349555f2863f485acf569c1fb0. 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/HKG732349532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc4b424baf9b417a0690a623fce0446a24137d45b8ad3297653ca3bece87e2f. 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/HKG732349534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea8e4b89fe64caa8b55ad25102ee284abc11410f34952728dcf4616a7a6aa28. 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/HKG732349535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9015a0d48a82532f58a51fe54274ea5ef84f20ae39740ba54545fe1753e8e7. 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/HKG732548247.