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 0x3cc9cd26b03e491f9229d9faf1efa0b0436fb92d59dff23bee4437aead9de684. 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/cba7630d-4a30-41d5-8256-f7d16cfda4f4.json and https://artists.proofprofile.net/proofs/artist/cba7630d-4a30-41d5-8256-f7d16cfda4f4.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 0x6cd6275ded6dd3b8995a8f339dba11f60c94cadc629cfe39656f80786a6af957. 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/USA2P2225019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9dd77928a473c0588de46119bc17ca79fca827cf472b24996977da4d8ef5a63. 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/USA2P2423103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4238b538099d675d1e9c44bfb3f8fb4ac8ac9be089972d5010d371ef62b2b527. 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/TCAGW2344409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80423a8d0b11ee5485ea307990a854683c93fd240a9aebf43fc5ed9c111ab527. 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/USA2P2227761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ce6e8d737db06903b09b0466296a998c22de4006a9b2f380e8ac05cc03db14. 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/USA2P2218817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc7e0292c4524124bb3e1cb4c669474b5c27de5168495d766cb557a7deb521c. 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/USA2P2200262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3de76b1eb8d9cd149902ef4b696d65e422df9ebe01fe9495ab88fedc5a1cf2. 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/USA2P2153419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b52bf2ec0f37c29339da770f0b70e305ef01ffae24e8725d996f881cd196d2c. 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/USA2P2153418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d753bd0f59068df479c5af3da4eed462eb4ae2813b8989612563e0fd233cde. 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/USA2P2149109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6c7a2ddb169466534e095bc6b2a3742ad37cdc584505456a9dab2e680bfe02. 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/USA2P2149058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4146fde81f3cddd32a99345302b9720e3ae3586854f8172d2278fe56f6c6238. 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/USA2P2130617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd917168ba12dc47516b0c428fc0298cc0158dc566dd6cb0d7579a0082f4730a7. 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/USA2P2122928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49fb40bdfd9194c6028b725ec2d582d7a66a4eb975cb31c05cd70a93e577b88. 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/USA2P2116970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec63b511b7f69a23832587709a184915da7c3fdbc906705018a03fb4208bca4. 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/USA2P2117862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16cbaca5e80ce2c90a64243ab8a2b8b9775ca6e26f9295214f4deac872ab6d6. 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/USA2P2116043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3dee53a6b9a8c1bb089455b4849c606110340c4d441ca157678d1f4bacb425. 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/USA2P2106806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f3b303d0b8cfeb3fd278565cba6d3c189e574707a3141ee22776106e8007a1. 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/USA2P2106781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa352cb9df229248be45737bbe64e19629a6b79d26de0dfa46de2a24d7813e7d1. 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/USA2P2045029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60a057f0f8efcac4ef06ae53e5929794ebaa1c2c50b2e32a586c4e127f2e5a3. 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/USA2P2036614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26aaf53bb28d78c88edff58e49ebd69f01ac21beedf6285a2e95133fee5297f. 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/USA2P2031455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d9fb2ea4db126ca0d72a4dcc150dc6ee1affb25b2b4ce3f74a04a138943a7b. 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/USA2P2029393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4d219a517bd3d138746f1b796692403fbd9ad427ac1796b33e6009bf3ff21f. 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/USA2P2024691.