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 0x8203aefc4643e88274b236ebbb01fe69f026699e47eb5e9b761a42d757749385. Chain 2 (Bitcoin): anchored in block 953936 (2026-06-16T11:24:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/207bad9a-6a13-4f23-a9b0-6ef8be2ab376.json and https://artists.proofprofile.net/proofs/artist/207bad9a-6a13-4f23-a9b0-6ef8be2ab376.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 0x9c0d72a5b89640306efac7ae2b29d95ca27b7539d1b05144dadd7e8bf8f5f0e2. 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/JPR502200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098b415bb1d30ce5ea732969a8531d17d0a68aabcf2facc14abf0a8ac233b5a0. 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/JPR502200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63eb55362188c71f45aa2d531d96b3cc7cf2058401c0c9c1ea7ece9b472a1bc1. 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/JPR502200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb471823ad75b9259e3fef4e81e34543f9affaff549618867ddcc2413c3301b8b. 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/JPR502200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74a3a92c1345bdf7a0b76d894013263ab87fade11ad629b147aeab3e35871c1. 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/JPR502200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864c55fe32c44229d7de085d43e5cb5caf7f70d4c90e76ed60543a8948ed2ac0. 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/JPR502200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2fb7ca091946c6cc64cdf87973d619ec179e9cbf689200a606a0fafe2262af. 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/JPR502200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cb52298d836646de67fbfbf7389c2aef7658062ed84a9899a7c7b7d66bde48. 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/JPR502200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2935ddb8dd681abd4a843b51336b4dc6cdcee11b5cb2419ff5aff7cd5f0873a8. 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/JPR502200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901ab9c758a717c917f6368f909adad579ff30eaa9bb681a98365c34e6521114. 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/JPR502200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03694441559f6449aa5cc14d5a06677e2e8208aad1cc9748a474dc77d5db3be4. 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/JPR502200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461c21b0eed3a42f13de30cd08409018404b8ebdfffd27bd44297f4f6b7dd6e4. 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/JPR502200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253cfa67720f75541b8974d198dd023a50384a00cb5cd3e833e733cd31ee07d1. 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/JPR502200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8768058617b094dd3c545de359af755eee3eaf361ecb09268d7388371df2b902. 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/JPR502200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ade3311b4bb9343014013a53232f0c6765b2a9c9297c6efece130a86fe5f1e3. 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/JPR502200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b797b5463e7663ea3a59ddfd3dffc203365da52df13ededae5c315391499463. 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/JPR502200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7701ea48e64a84c632fa360ac88129105c9bcc46e6fc966e48f4db447d17ca17. 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/JPR502200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4132477d35e74a105ffa69570c9645069f175d36855213da0a7b5d13537d2600. 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/JPR502200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31702a8042b3ab0b31515f0b46a07371b11c75276eb85a86c36220639ea772e1. 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/JPR502200058.