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 0x0fac22b92df359d45f6459a2819e66e1024667af6e38cd5c60c52afea00e2360. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5c9c9d5-0a73-46c5-921c-719b1e79a118.json and https://artists.proofprofile.net/proofs/artist/d5c9c9d5-0a73-46c5-921c-719b1e79a118.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 0x698e39c516c95c5c336d56ecad05621a49943a1ba2456edfc29d37b98096859f. 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/HUA792400162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485b38158937893c3ac50278a733921b7870eed3f232c0d831646f28a9f05e7c. 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/HUA792300219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cc75da9de1f60c318e1afa52f9be27369d42db7174a899c41775aa0df29cc0. 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/HUA182322301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d17d7180c18987b40642086b92921c5ea6b6ae2a07b565eccc8f63cc1dc1cc6. 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/HUA182016301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0431ed5458193a3ce63938a18c6d78aac7513f88f892213231a7a470114e673. 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/HUA182013001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e4f1e9fbe39a9fff514ba5f2f15ecce866327da7bf10e1bc4459006475bf31. 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/HUA181912601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5a5e47b49599919049b6c50579923d43191c4375091b3cb0ebdc5304a2ee5a. 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/HUA181911401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47595f99c35ad3577217a4e5d756538f46e402a0fc131df78e40d1aef21b784d. 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/FR96X1921559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22297a692239660699e4ad7501d3604e41453623f0901e86bb4dda99b00dc3fb. 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/HUA181910301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553e6654c5c9086b3a7c37526223115d4943a49ad798eba1f04127c00df7cf62. 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/HUA181910201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394cd373a462e78519944412138b8a8563fe55109378d8c06422f61a0f8a6213. 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/HUA181809201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15958c9c4b757d93898afd44469dc06a56eb3aabdf5b002dceae925bbb3f3329. 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/HUA612303388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7c8ff6fabfdea42aef407b6089d2b9cef6d29ff83e7403541c3102355f7390. 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/HUA612303389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719fe631c9f2fa4b64c088a3bab206f1dc244a0d2c938b691edd792408cbd875. 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/HUA612303390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9149caeeb1b3ccf4dfd66a31aefe3aed5966edaf9e0bf2ac4bd32126c2189a7a. 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/HUA612303391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddf3af22c6d0f6bff0fb2237815589560b235910d528ac14f5e58eed140321a. 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/HUA612303392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc78a54777ca2f1bd070eece3c00b29e9df3e479f67289247b0e604211a964e. 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/HUA612303393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe352eff8a074bb4cb0b9eb5a3009816f7dfce380054537bec3ec38f77b8e0901. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HUA612303394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7428167c76e304431464d803f28c7737fe45ea29f550a74b4ef29c48d6bf4361. 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/HUA612303395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06bf91c67cdc734a6e26fbfcac1cb876da666af5956c27d92ea060b5136d24a. 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/HUA612303396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06851386b13656805d507b13ed4ec7ba647680f07accf1d4746fc87a5c7d0e5. 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/HUA612303397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cfa377f454664b7c68f515c73c914857e7595d8020cb60fff766a018a3e595. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HUA612303398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86bcdb8994ff27e760e6129b8dc468c7c5dea1a1587fdf9b436a86b1fee8e48. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HUA612303399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab183d6b41d53ec10e08427c60ed07b3af8a71a7a14746ffb95d13d61d3883dd. 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/HUA612303400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8beca244281b200a630336e851feb9ecc453fb528bc6a2d6afc2821077f01468. 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/HUA612303401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42ca33f5cab8d4beed7a3380b9adc8627ee2171205776a9f55a3bf60f38bd21. 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/HUA612303402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599723b1ab944f90d49e728df90bad3db3f330d21e69775d04fa5302f861ad6a. 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/HUA612303403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1414f0aefad537d5b8bd71d6421b70fe7ab8ffc0ecc2961c517aef85c370d6f9. 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/HUA612303404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90fb7edd8ee6a7310206d540c2722dbf209b3ae8a9cf6264df49f103976c251. 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/HUA182015201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fea5fe8d3dcd7e4a44c0421196df06d441936824984ea2cf65231751f115d3. 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/HUA612300927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4aa8c89a38862f7c06e9c8021280f42445379dbe1d27409df2bb28685a8cb6. 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/HUA612300936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4571135b4252475e36eaeadaf145dbd5526de8b0b5a812997f9228a7def4a41a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HUA612300989.
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 0x3851892889fd5cad811e80c7f124b1f8e0713421720533911ecaf64f5a8c9a0f. 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/HUA792400178.