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 0x2f078733fa8bb316da1907e8f7d115890d2a04b55a18411b75b689eb5d5db382. 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/a3c3cb39-2122-4d28-a1a6-f5400aadb189.json and https://artists.proofprofile.net/proofs/artist/a3c3cb39-2122-4d28-a1a6-f5400aadb189.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 0x2c543369410f6d3143f7fd605af53867b4690888ce7a6b2d092fce83670838b9. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/QZNWW2178440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329d4f4d4d800a994b7db0268eea93c417dd3a454abc1095308058f2b3cb4755. 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/UKR6V2210554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602ce51aafa0746f2c338f25a7a9a217ec39191a7367dd0162de67ad2323655c. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/UKR6V2211927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e0e68ea946bb7fe03a3788337a7b237cb8e11135a23182094928b5d58ac6c1. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:37:16Z), 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/UKR6V2214197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12b4214e40a51d1315b4ab632613679bfff729df3fe21dcb9c55466685befb6. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:21:41Z), 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/AUMEV2335740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262ee817a8f28771b348fe311fbe08a98f0b78592d51d4359fcc6c29e9c1d842. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/NL4WT2300290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddae34089b0db57ad841bfbed11d5542c035f70a475a1ed4d4a3609fc3afafdb. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/AUKDT2300632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46304bb9663eafe61711e78bf162687e8bfd0bdd222481450bb91bc10d1e5641. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/AUKDT2300825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac9d91f58749588a3504baaa382a22cb00d1b12a06dbfc6421e6992ba4919cc. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/NL4WT2400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fff1c23d2058898736d8b1685c73c2b63984c57f592ac3a6f66c2adb92c537. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/AUKDT2400525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7416beeb13fbf36a1a96634e291f7f65827ba49831f389e30db3647527fbcb81. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/AUKDT2400663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6361f8e554cdfb27a61a5e44001261924da436c5d328585db3e3c8ccb8b20ae. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUKDT2400730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01ba87292c93ab5614c5339417ad8b809bc0c58143543fac323c37ecce091fa. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/US3DF2487468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22db13d47fb048fe0231b03bad19471deb491a92c67ef11d5d13d0dd496b627d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:46:40Z), 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/QZZ8A2418378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4a99a5db48cc0275f0dbabbe3aa015ce064af5619404b8ab14ebd24c3a1523. 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/USLZJ2466707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc9db5753e160326c2d3f104a5e851d18b8a054704d9ff0023821dfbfca11b9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NL4WT2300345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040638b75229b053f72a3ad9e3e9e4313cfc41368a90304d5a25784b2f1b2c9f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZ5FN2335226.
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