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 0x92415e81e21ca4b5c2b8691275e00e03ef2db5dc4871631fefbd95886ac68e53. 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/9a5e62da-1976-4e6c-ad4c-59daea236b56.json and https://artists.proofprofile.net/proofs/artist/9a5e62da-1976-4e6c-ad4c-59daea236b56.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 0xa06a6b2d753b770266793ae89d77e92bf612b8abeb8f638676d22e674813632c. 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/TCAEA1978430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf7b3edc799e8ceed8de007bd9ba5b27cc75cf307ecfa18950b713da45e295f. 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/QM4TX2562412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8da5f5f7d5f0a4b08cbffe02a51c727ebb0f47491d7428059f2c1e02c983f34. 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/QMFME2435757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9095e0056f49945f69a4b4c973035eef2246a0e9848069f094623b470deb2c. 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/NZPB12401452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7b093a4489e2f94b8c88a55bdc81ac9bb2ced0c54c5251812dff96bfcf66ae. 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/NZAM02401647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248d0618eab6690a3fec7dff02d2e49178e0beaeeee2ae6f11cf96fbdb2fb880. 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/NZAM02224911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a13f8c59045fb82efc77cafb6ea5f69f8c9f4a5a8f55637706bad27dc13f013. 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/NZAM02224912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b4d5cde22727d4923d6bd284c293f7772277f4b08b808e486a636ddb8a031f. 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/NZAM02224913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b6fd696c06a7634b2078475018649abcb915fc1a831d97f28b1dd87e5bc5d9. 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/NZAM02222677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139df2162a84feb252ee09e562daf98c00da05a89a2fcbfbbd982a40183f7f0b. 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/NZAM02201421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b34fdb3670f42523aa22d58ecfc9579502fdec6413b17cf538bf0607d97c93. 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/NZAM02102946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e85e6a0b5b974917cee75783b97eb73a656c8e557130b14671a3e4d1d9b558b. 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/NZAM02003085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3027699026f87a863509bf757ed76e134e10f1be5315a04ff19098ae1428b474. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:53:50Z), 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/NZAM02003086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9b26b068018bdc676804903fe84e738859ff54a7d83ba5897d10ec9bcc96c5. 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/NZAM02002879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec40ccb96851df3e9db1de28cb7c7e88ec385d682583f215ede570ccb2285b6. 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/NZAM02001257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ed5e62c8ea3e02a3094f225bd38af9cc5160beded99995045a5d622c256d29. 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/NZAM02001259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68df5edc70209637e93c8505d2524a9d853b544b7c8fe480a87edf8c4dd2ccfb. 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/NZAM02001260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d43f9f71290f65831f0db1daaaed71902367cfd7dba7a9cceee7b9c72cfc28. 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/AUPBY1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8316d28050ad60885f16c2e97d66552eec0b229e6c44f7d1b9a9f892822b8f10. 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/NZAM01900854.