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 0xbf25782aa9bc76b0a1b9eb88ce16c6604661b42444bc5bdfc21286e63a057451. 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/39a9a2e2-733d-4a90-8ccb-94d094fef2a8.json and https://artists.proofprofile.net/proofs/artist/39a9a2e2-733d-4a90-8ccb-94d094fef2a8.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 0xb65094fe45df788134062c8bf21e183581b7a14cc0c1667aedf3373cbeed0b5e. 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/FR10S2265590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50d364755e0d2e68321ae4023f46f05dcbd3eb58c3b8f4fe000396fbdf73d76. 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/QM6MZ2260361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c403dad11f67a34a041911ae7a28b47fc03ffb5e7e87df069b590fbe59984d2. 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/QM6P42211298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcae3f4b2f303a056c22258cca0a89a82e43b78d16aae25d17754d3c3c716a3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMDA62251596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3afb59427f0118acdf04f562ba78cc50e38c64e1a42a39e7d9becc7ad0f29ac. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:54:31Z), 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/QM6P42316483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3841ef86b767ddba278f3fcf20bc86b631ff8fcdb997f4667413be273efd97d9. 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/QMBZ92375744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe174f2decb933e79167e4030a670a3ee8d2ce64b50da76e1136b3cee628d550f. 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/FR10S2429797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8ea00a1457dbc0c90e5ff5f46bbb5be94a046e4eb14b1142f06ed85579d799. 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/FRX762432463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cf83424cfe232cc828eeef3baa513218d65a4d9e383bad9f75bef3b350db4b. 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/INUM72000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7aed951dbc10f19e7b12afd1f54a1e1290c08277d0d2ad756b1f6926cb6922d. 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/INUM72000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f14893f116a9c6f4670a19a186bbeb3a832f70df3874624ac5427f2618993f9. 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/INUM72000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec01f962896e033e131435f8c84a895aefe16cd61216cda6b516c87bc43d3fd6. 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/FR2X41985924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172292f3198ce8785f9cfd4c160c6049e0b30749df8496df89ae924cf3c0c100. 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/INUM72000112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fac2c9031394a249c8808425efc8c72ee79231375dd2cb181ab9912a389cbb9. 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/INUM72000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cdf746fa85619d749dc1bcff2697e11646fefdbdcb4435a3989cc8fba4dfa9. 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/INUM72000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1f72f9241d028fabdd1680cf0d14b9a708642b506e5d274b5b5b673027a843. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/INUM72000115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49bc436cbb0d60de0654cea3cf49c15127293017608113a8f277e7a341150be. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/INUM72000117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fac2c9031394a249c8808425efc8c72ee79231375dd2cb181ab9912a389cbb9. 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/INUM72000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cdf746fa85619d749dc1bcff2697e11646fefdbdcb4435a3989cc8fba4dfa9. 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/INUM72000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9152abf456a38d04de013d805b4646b0769f5624596b1a5a98e50f9f08098cf6. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/INUM72000116.
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 0x5bdd3fbc26ed21106467dad2477e14a574b935bd41e856fe7570c27307f1ebe6. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/INUM72000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3930d9e94a05b53dcb2ba29090660e05cd24be074d7ed31be2871dcc8fca036b. 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/QZ8LD1981598.