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 0xc47a27db683f885bdd51bf5260997ae3016a87d04c45218806f8736bd5986654. 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/7b9602ea-310e-4530-9c58-2024d5405e3e.json and https://artists.proofprofile.net/proofs/artist/7b9602ea-310e-4530-9c58-2024d5405e3e.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 0x1043f2a7ca3c656c70e3dc1a47c74f0db9a688da5b0572615e840259008daff8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEZC62273433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37da85209e91d5e8d72208eb0f1a02a68a4c5ddd529a95938f4602dcd16c32f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/DEZC62363148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f5d370727362fd4efe5304aaa3338874ae3b5dc8e3fa0bc1a2667b5f34ac3b. 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/DEZC62451215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436a973bc420d8a620d752efb47f29f94cc677c5df246ce6140541f1be9b7eb6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEZC62443342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3c19d9fbbcf1a301971dbb4ac5b184e12bae12f473004280254141dd61cf39. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEZC62443340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436a973bc420d8a620d752efb47f29f94cc677c5df246ce6140541f1be9b7eb6. 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/DEZC62443342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c5d05a222fa821cae5743a4eeef09639ce8a5f16749e8a4f76be61992cef12. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DEZC62418176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f5d370727362fd4efe5304aaa3338874ae3b5dc8e3fa0bc1a2667b5f34ac3b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEZC62451215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1774e0a0b14c37b3677851b62d05c9a513866fb14365a4179ed197cbe560413. 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/DEZC62463016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52850cd980ab477a7a433d152754e248dcf9b1de7ca0fc3b1c237eb59bcb3939. 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/DEZC62328892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc85fe29fc57ffa353c3990974dbb24f4a80409480cb5be3748730b4ca6ef58. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEZC62332914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297c862d43b6e3c237d16aee15d18580bebec91193327bad90f04bdb2e81507c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEZC62332918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c6452720d181c62181f52c005497b8bc0ae771209dfa8a292999ca3ed3c14c. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DEZC62332920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969eacfe1dc9fe7756bdf72112f4f5ee9cc604dac77a7da0b0e0e2be44b6f68d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEZC62405949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969eacfe1dc9fe7756bdf72112f4f5ee9cc604dac77a7da0b0e0e2be44b6f68d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEZC62405949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce13a309c885307dc019b28c7309f7eb2798134d86137ef174ed654001be02dc. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CH7812419720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccd85a114cf14b8158abde9f350ee77a793c9d1af982230be069a26ebbcd222. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/CH7812419727.