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 0xc27beb5dc8574bcfb5040acbc2bb3986c817fe1c33502ecaf9462b770ad616fa. 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/1a0637f1-4ce2-4249-b34c-6040a055eca7.json and https://artists.proofprofile.net/proofs/artist/1a0637f1-4ce2-4249-b34c-6040a055eca7.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 0x52a68dbd3919b0bb4df07a88e2b86958724dafd158d8695d410cd17e843593ae. 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/NOX8G2300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4485d192ab46ebeadb91e07a1b4ff211ed01fc8c1a57178810387503e2099359. 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/NOX8G2300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3cbee0f50e4ec78de40bac32d51cf330b5ccb3085045ece3952862f0996227. 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/NOX8G2300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf233c98dcf93df081f2f441585341cd722960983aeff1ade44f5482693a7bfc1. 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/NOX8G2300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6506beaac56fcb889f2800f8f9c59615d031e223f2bc2df5d3ffe78bef8161d8. 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/NOX8G2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958c330e04040c42c4813799e75968a9d51dd8731a4d81255acb7d0c561a16ec. 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/NOX8G2300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a889bedaad3c81c7c63bd372fa44cbf0275a3829fd6e8b94d581b7567652b93. 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/NOX8G2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc9019951c0f18f8ad2bbfddf68d875664f1503bf9946d208601499f3b439d2. 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/USA2P2361086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1b221da64112ad790bba351ee8a3e45ce19af7d4b5ec9852521857c264eca3. 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/USA2P2421076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9608b51cad201f69dd5679ab19a6c010c624698a3f9357dfc352db56fd2371. 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/USA2P2421075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4459f7f68ef5b3542c712d5bb98b7a7493ddc19fe21c792ac4e3f600ebc36a. 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/USA2P2421077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f0b82a8e2f39145063361afd69aaa34af9c4503d92db4f3a7264daef682077. 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/USA2P2421078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48043a495884b284a99606c36f8b7b5172d93967c04055d11c1f1cfc6e83ca60. 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/USA2P2421079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943edf6ac0f42f75fac9f98295a399d356acda7a85042508520e2d21325560e0. 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/NOGTA2506610.