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 0x6cf6f59467e4fc5e0d7495139061d2b87e26dff25f5fb8346b114f674c23b2df. Chain 2 (Bitcoin): anchored in block 953627 (2026-06-14T11:43:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e576742-42db-4b06-84b3-d78aaf5c147a.json and https://artists.proofprofile.net/proofs/artist/2e576742-42db-4b06-84b3-d78aaf5c147a.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 0x823cca9042a151b569de91e1a0ab0ada1492d05ae09c15377550ef96e5b9b39f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMER2487405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea08988cadbed24b993c3ec35eac30d6a3576b65254b045329e7d718ad31fb95. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFM2491470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc4033d8f09f958536e27baba5d1e69072ab169c2216a614d9504326be0fb58. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFM2491471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a061e013675af78eecbe193eba79d58735399578475bbf0c084284b8e59431c. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZWFM2491473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cc0ef8b86671fa6e084965631199cb8ee2044ba375c2262c4323901b00dcf4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:09:42Z), 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/QZZ762402028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562c7340e2c15709d63818261478ae806f1993732a0559f02c2f2e4a424eef5d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZZ762402029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4a2ac58ce56acea30fcbf56bfd3f4f41c00bb418a04bcb2c78ec0b40295234. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ762402030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6a30bfeb736eb4fd2db6b2a57843c3d677a34f4badde620170a0a7a959861d. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:05:27Z), 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/QZZ762402031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c73460b8572bf31ccedae1947aa9dbe8d321c45d8bf2d33d03ca3d5051c18f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ762402032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fe954fa587eaa1f9fd888e9211437b603991b71642985b4914c5b4e62a8c01. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ762402033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3ad48f62004147624bbbb6478a82dc69c7c59f132f6590ef4d34cbd92ff0c1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:36:39Z), 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/QZHN32552100.