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 0x1b9a26725eaef9356ff24fca4b426c664cc6bf6891487ac7581ad2c70681385c. 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/f0d7b602-645d-4f83-abaa-bc4eaa5abdad.json and https://artists.proofprofile.net/proofs/artist/f0d7b602-645d-4f83-abaa-bc4eaa5abdad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x68e7967d1a86294cf82e3fd87e144bbf670a2c2d09e1ff027912092a99f2b983. 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/BRX6F1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863740c1e8bcce745426e594c6c7eb4f9b0833664627594224ea922c3fdb7599. 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/BRX6F1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8c1f99613c5102406c42299741a45042d183f54e69ea719994b83d6f68b1b9. 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/BRX6F1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea01cfc830ac2fe7c027473b3a2adff6acaedcb8d104d5219fcbe67f13685ee0. 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/BRX6F1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18a478cc9601a58e9298dfafee8a96f3dfa08c71d644a3bc38cdcc41905802e. 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/BRX6F1300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75df188ec3768ea677df88674507dca7bc475d89bc2091b718352db26d1d5dba. 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/BRX6F1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4a9849230f9673c62046244b742c86c552333e31b93827d2bb7bd4b02a08ed. 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/BRX6F1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab51685bf22b92962eff178d017d97b555fb722010b32cee4a32cf43aec9654. 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/BRX6F1300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91303e5b67a0f1de21eb3ddc5df60ce0d8950866a3816e4fb33e14bc53c6ccde. 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/BRX6F1300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bde4ee2a069a879dabb4b274998c11a1e8d1900fd7850e85f3aa341ce92a8c9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRX6F1300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adc73a5f81531d1511d2fedfa2b5b6e9aac90bed5f238f9a94c5c9c9061e841. 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/BRX6F1300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a163ba3c370aeb0f34842133c6378c608436eed3c7209ffae04be336fd5e05. 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/BRX6F1300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09cb04b8ed4a652b60d9f0f5aeb2ccbe43d62c12b434ac0b0bf695d90eb7f4a. 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/BRX6F1300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a96921f77bc62aa14f0f3c7a8bbbcf8632f629c9f162e3f9304dc68a189e97. 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/BRX6F1300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc5202b84ec325046838afe05bf08d37c875428b018d31fc042b5a5abad7075. 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/BRX6F1300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b2658d60ea5f76c27d598fae7e21d4d30a9d86285f4968fb91e6e623e43745. 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/BRIEF1000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439d4827b6b4a6eebfdc7f7545960ecafdc83857b0cfd03c8e97f38f0e9b811f. 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/BRIEF1000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1629e217ab5c68f6b36ff7ca70e0d578f19db295f254dabfb5ed54b4cd0339. 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/BRIEF1000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e0f3b095df5f44182b3e4d251fd9c93a54cddbded67d02de5c5e0c3e34841f. 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/BRIEF1000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f146ab113492e8f1efdd490af569fc0d73081374330d18ae1d1e44e416ae03. 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/BRIEF1000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd807e07f73eaef71297ceb380157eb296a43706c002a1379fe507c6202c4ab93. 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/BRIEF1000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f7a74bdf84f6e07eff994f1ae5a6e25466bdbc9a2819efe00c51f43e07dc6b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BRIEF1000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9bb49e1436d46339b24d0f18999dac4347766e4fb724c292131055f75337ee. 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/BRIEF1000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403fe0ba3a3bde3c7c1266607f8a6594632ffce8c0ff0e4f29388206d391f15a. 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/BRIEF1000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfcb10fe58027100927c3bc81595e79c886456810454a93035f8011488e7514. 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/BRFYJ1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ac7757b7cc954ba5f60733aaf68a566544b040d8ed9d084fe46c9b3d9a9f5b. 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/BRFYJ1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fe2d498c400dd06dfff6afb1d9532c2df8a6d3ac7a3ca884ce5b607e17fc2c. 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/BRFYJ1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4290d439d09a2d19748df2eaa6858545c0458fe375a0c8bb57cf5615f60f26a3. 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/BRFYJ1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc806cef71c33226f4e325b7d7947960f90eeafc5e44d5035ecce5d23ea80cf85. 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/BRFYJ1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17ea08d1681eef4293ed1bcca0e09c2c9a99296a104811e56d5f4df639224d5. 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/BRFYJ1400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092a978fd4dbd15164e1cc73a7db534ca3f194a04648a91912df75eca86cb534. 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/BRFYJ1400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8e809df949df4067c7391fbeb5e271046c933d357f10ccde7d51c7e877f159. 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/QZ5AB1873890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f49ecb764e47a05bd956d529dcd5664c415b966c0405cefb8f6608037e1d1a. 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/BKKR02300001.