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 0xb8e3b048880507a4059a8babd761b7c017b5959b86d06e5cc72b1d3153b4e99f. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8d8437e-82b7-4f2f-9b56-9b4a2d6a21fc.json and https://artists.proofprofile.net/proofs/artist/f8d8437e-82b7-4f2f-9b56-9b4a2d6a21fc.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 0x66b471e17e09f6aa39f2ccb53d7099aec3106ef39ed7fb9079f3e0ce241adf40. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:09:49Z), 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/US3DF2506537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb810486bcdb68fe558db95b03969e3bafcc553d542d1b0d0d9eec981ab20d3fb. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:23:07Z), 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/US3DF2506538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfac32b9708f4cc67fbfbe32c5e9c378b2c4b35d3e35f416edc8c3f0a7eb7ac. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:07:51Z), 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/US3DF2506544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e82752bb15fe505e05af91ed66eb1759db8402c0815031d9d666a5a3be55e0. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:32:06Z), 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/US3DF2506545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fdd6e33a6080a3c423d9af051375c06b99b392a70c2caad7c9e6b64ee9ebe3. 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/US3DF2506552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084cea1a58ad34a81e63d171ac54e4d0982d6f5c3de5f641e5647eec55609680. 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/US3DF2521220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30de579e401ffc696e0677eefa681c54f29382673277b2f7110d90f59dfa1b7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US3DF2521221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01017dbb5e40d7c654626c3d775c9c5b41220e8a4568e4452952ee73870a7e78. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US3DF2521222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8966dd0a28600a6abf0c84c669d6b67b21b19aac6c1f42650b16f397d2a9821. 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/US3DF2521223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8ff97ec8434b85bf3072f061cb847b841728bebe82f0daf98d5b7911603ba2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/US3DF2564268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf82fa2c3acca70f00a23f4c7894d9401fe618a07989b923b977102ea0586f6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:20:04Z), 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/US3DF2564264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc682cb4de7c63afed7ccf13bb40e2de950928ddff0aa55e9bcc0c4907b4bdc. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:04:09Z), 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/US3DF2564262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b7d257a34946ba66eaa98a6f5c8ede719d2aaa89c34c596cd18899b452cfd7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US3DF2564263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e25d586bd05638dc31119f5f93d9fa45429ceade1699bf200a8d259838dafa. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USANG2501534.