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 0x54081366101c6f4884381a840d640ed523506058d16e8f53b981830b8b11406c. 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/bb7fa2ad-78db-4e04-a6c9-20f5ddaebfaf.json and https://artists.proofprofile.net/proofs/artist/bb7fa2ad-78db-4e04-a6c9-20f5ddaebfaf.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 0xf13449ed73ff5cc40381d950cba1b9163eb24b9100077ca76c4e122f02b53b8b. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/DETO41533740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d32f06a5351697f03d3ce9992954fb920eaf717cb1aa33badcd48a85d6558d3. 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/DETO42116526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76deb6ef34f0454f173094c3e1cc834576d3ff3f5bfdfb833f9934bc9ed23c7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DETO42139060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4a7e1f356584334c809f9b93ca51b08d56f750fd73eab588d0fda7a5652e45. 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/DETO42091016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b87f28128af27c06aec775f32549c9291a2d0a2ac47b37ebc97cdccc1222a4. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/DETO42140035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493b68408cb75a405f65b1a1f0cdcf28eb9aaac416f7b5dd22e2721cca331c8a. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/DETO42265388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcf3e9c8b9c29e4e44f1d297e8cf5bf3fac4a3c338d746d6c16e72baf1719a3. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZS672253655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb2cf955ce14ea27c375c1a11b2a12ed69b9ba7af88959feb2c35d3b46e878a. 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/DETO42290178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc676f0f48e034a66ba2de006b025a9157c279ba09821a0b27357b8f736897ce. 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/DETO42269438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc349cd1386b466294eabaedadfea34c0da44b4fb3fe098ad626c2106d2a33c38. 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/TCAGN2268981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cde1cd1fef2b8818fdd97afe33c55dbf6d060d071a442f2f623224beca48c2. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TCAGN2280027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26690588348c24df3f18384a79049ca6b652a2a242490739b0f6e7fca9e77a55. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/DETO42269372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d581510eef90557ff9c7b3c556ff249a76005ba998b910d0893c525bdfe781d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMHK2269524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0055de5d2de5d75259d256cfc089fdd8ea1731ae5845e583513dd8602c8c39d9. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/GX7852300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab7cfda361bb651ff8061745dca56e16edc46654e2c0f2bd47f214d2d7ae6e0. 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/GX7852300136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd810f930a8a2f688bc76a647575231166f80ebe22c22e856453747e69ae94fb6. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/GX7852300134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79f37baecd1fabd348ec8e6f6b9ef658a38044cab1d2cd9ba6fd1bf79f6eabd. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/DGA0Q2343353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe876c80f3bf1d8d01fcdf899e1a9675555b92c1e56d42da83686c77c3edf4165. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DGA0Q2343354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8c7d3db8e94d6aa6436c6380affda666f83a612b4f529f693263e1ed80dc91. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/DGA0Q2343355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f549a59f6f51f27983e06264f9e0312ead50e6065d8f27669dd6cf2ffe07b6a. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/DGA082404687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d0218a3c2ca646e69869af2f3e3a087766fc3852916f1981d8033b48b14bda. 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/DGA062531166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392d4d91f5e37dafd4515128939138943da17ba3df7f5c6b89c071e597158b23. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DGA062548394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216061efa7917e02f6c9db2f9f79aa5ed65607589c04833bf21f1b09079f7a80. 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/DETO41427779.