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 0x7f4183d00633eb8fba2d7ee25adce3203d683a8574415dc24ce2107df330d84c. 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/9396e7d2-78f3-4957-8eaa-d056783554a2.json and https://artists.proofprofile.net/proofs/artist/9396e7d2-78f3-4957-8eaa-d056783554a2.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 0xeef7b0bb15c442e5fb4153b0ad7195363fd81bb825b5df974f956c3cab88d422. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/CACWV2395058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe180e5b4d666f38e03423e03cf396fc72175915d5365cfcc26c641f0a9e1984a. 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/GBLV62317163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e97cc0ed9a04d9c8f739c7e6baaf72e4e26373eac3c8daa0209869c0a0533d4. 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/CAHQJ2452841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965257088a2cdc82af802ff08073417eda0006151bfecca979ff0dba54121712. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZZ662466929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965257088a2cdc82af802ff08073417eda0006151bfecca979ff0dba54121712. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZZ662466929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318b4e2deb5d9058a4680f6de344109545f96312b4b2edf13fe18ce18b110ed7. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/GB8KE2407390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d60bd01c3ed8e980793e9b864e3373a970683ee214c0455505685c9f3578bd0. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GB8KE2407397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff55304cb0f7c779fee01e43a575db8cae457b98d6da3cbcde6b6cef4e9103c9. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GB8KE2408034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe8025246f0fc02d5b2b51ad9b7c741ec147e9013bbb55271436442726a1e00. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GB8KE2409057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f2d5521c4ccba61818a91545a2a57f93bf1935b8a0b861c22b3ca3180cde9c. 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/GB8KE2414477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ec61306b42100245617a5750572cc2d381db6ae57636aea196fe0191c702eb. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GB8KE2415551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70901b88156c09f5e6ccf342ba011ce4544282e978527ef465bf3ce522546b50. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GB8KE2417129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7c618b876331ceec97cc6ec4701cd76395e10392077504d9ec4acc0e23cf7e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CA5KR2495458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803557ae6ae06f2479cfc5e709d0436df9deb577c28c16a6023f17315cc9ed4f. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GB8KE2422605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a93db00337824925816c415c5bee9cc5c41d7c79d35d4fb8b18a528294e0da. 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/CA5KR2497636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e0a47d820491f4743ccd2b17ae098307f28f75ee49c54c0b453a76630f577e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GB8KE2429260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3be472f4376b131a3a47c53bac48a186118f69b2008f932dcc5b44fec64b344. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GB8KE2502357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5076aa6c30dc996936c2f2d5396581a5946edc17d7c18549eb077c02a8905e28. 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/GB8KE2502692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a9c81205e3fd8ef734bc8b60274d327c69eb0f6588f57ad983af65403b4ee9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CA5KR2517081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0be1450011ebc937437fc5f088b1ff836806890ce8de4db439cfc0b96d68a9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CA5KR2518403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f74fd82b957e1fdb45ce7599f8b75e9b1ee78de7c64a6ba9690893c4c96177. 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/CA5KR2497626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a93db00337824925816c415c5bee9cc5c41d7c79d35d4fb8b18a528294e0da. 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/CA5KR2497636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6e6dd8f70b412b2421611e78870bdf515123a90ab0a70cde849f2328f93d0f. 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/CA5KR2497646.