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 0x4ee02cedbd9e381b31e586b1f7635008c1c745eb462f8a9a7d5a7e0014a95325. 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/17365877-ad60-4c70-9ba2-cf8c97b92293.json and https://artists.proofprofile.net/proofs/artist/17365877-ad60-4c70-9ba2-cf8c97b92293.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 0xa3bf9051577b03f9e5e4934475a5d662690d584c97c0e8970318b419a74f247a. 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/QM6P42444745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c78c66e190d5b5517d3916f29c44a2d15b2057c883a63475dccbfd9fb6d8bc. 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/QM6MZ2008690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c1ae59df1a984c10afc8ea17d89fd038fef5003aa163e05a9e52185092ee1f. 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/QM6P42306838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee3d09ce9af998a0a170cc2a382dd4c2c5dba0cfcc01e4a2ca5d76005743e3c. 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/ES94B2300113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee3d09ce9af998a0a170cc2a382dd4c2c5dba0cfcc01e4a2ca5d76005743e3c. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/ES94B2300113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3942d487563d48b3b402aa8b3c76d98897fef7c583c4102724d0db478538c374. 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/QM6N22415482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215e4a42f92da2d5c13ffe612203a915728b3e465cf10d6571ed6cd0f2ed9d64. 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/ES6702310002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b5cd7ea8126de907f32c8d3ee9c1ff2faac9f8b5d51d1d97243cd172a15379. 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/ES6702410002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399455a9e5def8d103b2e584d7c5f3ea10c28106ba7dba76790de8d08469e738. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRX202187788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15739e0042a890cb6ae0e0ae3a9a2e5c87ffb9aeb9c2ab8299c992dec963baa6. 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/FRX282134224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366fa68a0eb2b7c86117158eaa82b24f5af5171c04710e7974cd45c043a967d8. 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/FRX282134225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8991cf44a92c0c9f0343505073032c6b3ebc0e342597cc9514457a43500679c2. 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/FR10S2198237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215e4a42f92da2d5c13ffe612203a915728b3e465cf10d6571ed6cd0f2ed9d64. 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/ES6702310002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399455a9e5def8d103b2e584d7c5f3ea10c28106ba7dba76790de8d08469e738. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX202187788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488d999fbc038004a35d9b09d7bf84030ffb54a23d7b8f06a71f8c6e12ee37ae. 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/GBQGW2400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffd7c0b72ac744a85ef504ea914370efaa1096c53fdeb8dc479b789331ecfdb. 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/QMDA62126190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf042018c47f3cc0c71c435ce69df338b60cc11a795b08cef6747d11b3ad6e152. 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/USUYG1244519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318da37f933cf6c682eda989f9ad0137bb198987fe336a9389a41954234dbccf. 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/USUYG1270977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35f9c3989389476eea85243fc26047ae15a8daf14288117c3d5e4a043c2e700. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QM7282338356.
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