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 0x49573707db75259fcc93cf14230730e3091c465a584806da074db46faf018b48. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48d63d32-9e68-4010-8f53-d7efd066f890.json and https://artists.proofprofile.net/proofs/artist/48d63d32-9e68-4010-8f53-d7efd066f890.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 0xd14869f0c42ee26128601740448abd2a30d2307b489e00094a312af2ac487342. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/ZB6OD2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0becb8d0e46f3aeda877d649285681416f103d4aedb23836c48de7b072d7d565. 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/ZAFBE2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d185b30cf48b074d6ac6bb39de458b16bf7f3e010cf282e5a92884a485daf0. 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/ZB6OD2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf413dc5ca8a9d019adf75a0dacf1e604b778932162b72a61f7169bd223b24c5e. 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/ZAFBE2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0becb8d0e46f3aeda877d649285681416f103d4aedb23836c48de7b072d7d565. 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/ZAFBE2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a4bd5dc47938036a57c4eacad13eaea8a2aba81850976c3349c3ea112f10e9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ZAFBE2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812974208d096eb2148879e043da27c26f58916cb2b01e7bffe5efb411db9ad6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ZAFBE2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14869f0c42ee26128601740448abd2a30d2307b489e00094a312af2ac487342. 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/ZB6OD2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e318e7a7b8eee590a5bfe6c8af05adbc57d84388dfb90d081d6288b986fa503. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ZAFBE2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a028da61c47e7a8a175bcc2cb9a976d1a466842d5ed485ec8f64d440b4471c. 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/ZAC012201143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31e5fc8468fea1dbe4bac2c142f29de5ceef9704f014c7a0a1182d353bb3ceb. 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/AUMEV2450135.