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 0xcfd7162c041d2f49a2a6bf0867e57359895515763fc242267beeef160c1039c5. 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/469978d8-5aea-4f4d-aa6d-f96050d5de55.json and https://artists.proofprofile.net/proofs/artist/469978d8-5aea-4f4d-aa6d-f96050d5de55.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 0x7a97d6beab035e7926a39701e1eda34fd8bfa8f625954c9e4ead608140e0f563. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ES5022000239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3389677e27424c58cc0e93a26dc1c19cdde620a14374afb2e3b228526022e3. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:31:42Z), 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/ES5022000399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f0456d5a1181eb9e94c2df10c2325c8ad39c3408e089447d03dea3d3cf3627. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/ES5022101048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab794680d4f2e1b29fd93665839c14e28255542644601aef76f3ecbc6746e301. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES5022102348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdc8dec95dd6f13b982e6bc5855e161fea042122a89ef734aab70ee73677780. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:28:32Z), 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/ES5022200663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5d75832bf4daea0ddf580c1370989dff8c70b55dbc8d5bbb1fe26f50ce988c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES5022201195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab794680d4f2e1b29fd93665839c14e28255542644601aef76f3ecbc6746e301. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES5022102348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf847dabf64015d9d30ff3625efde840c423851cb060c05fb247a3146c27d7e9. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ES5022200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7bf11d4db53fbbbfab47e476514862ae169fba99c5967249c72c814f0949c0. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:56:22Z), 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/ES5022201546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a99ef5adfe4834f5c877e0ce04ada9a36c53c894472da00de035add29c40f86. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:59:46Z), 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/ES5022201547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a8326b26986162d7b66ffeac4e53c38b68ba9a43853c8451550d6e185028c1. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ES5022300611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e76db56e1fe84229f4ae39306f454bca35afd574103855a8e2122d904ea0c40. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZ5AB2481358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89704fb129a741ba98f9fe1b639a576c34d70ac4a51f79a2858f034a45b48df5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ5AB2481359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8faa5e456b4332d6335a83f9e2676518d13a8ad324c124b95969da1d7ca668. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZ5AB2481360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bcaae055af3510f4ffc2b8ff4644ea7d681c3b0513b529d378aa9dd552581f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZ5AB2481361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc841e5577e8dbfdae231f4436584ee120fbf4fdc1bccf3536371babaf937dd05. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ5AB2481362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc8da9715dbe9364c033e56cd4a73830283e0c4d5fae4fb51d7d4a398567ab0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES84F2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131bc0d7857644a74d58a6f90d7787d3f1c90b2c0e2aefafa1542777a692b464. 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/ES5702100737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131bc0d7857644a74d58a6f90d7787d3f1c90b2c0e2aefafa1542777a692b464. 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/ES5702100737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41f95b58be2f3aca42beacde39b465002a16eb6e4da537ed96ce23a41d7aff5. 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/QZFYX2069976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45255a3eae511cac8cbd7da47514fdc5a0d0c328121a165267f265037c28bb48. 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/QZHNA1940805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd40a532e94aed805b6fa3df9291dd0da0eac0fbe4da442f1952581d0e8559be. 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/QZHN51981272.