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 0x472b9481973d850affd19956503829f72a2ac05291817c20d7549457b6c4abcd. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea3ca07a-3a78-4a48-8e7c-acd7ca862742.json and https://artists.proofprofile.net/proofs/artist/ea3ca07a-3a78-4a48-8e7c-acd7ca862742.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 0xd26867936447339dad12d03536d2f305a0500ecc4d46f1e179ba91640f7bdff7. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:31:12Z), 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/ZZOPM2108937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6b678a1f233c70c7214efaa3857a88c6437d022b0b42fd3cd7ddecb766200e. 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/ZZOPM2221958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48865e745b4b4653da6e7fcc6ebb96f5e23cfc67b55b794f9ce4e71f48a14e2a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BK4DA2306996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a02278fd94c03f5b7999f5357fb82ac44a4552d6d30f07d7f6a8aeb6ba69045. 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/GXF9Q2457651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4f32a2ba6e4d700526f13b67eedf76d64cd33162676e57ccf02f3fdb55eedd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GXF9Q2482257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc303d92b14a80dc1bc657f57b39324d3ff87e7ca9138d82608ed40b150978f24. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/AUGBT2504213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3ae9a8d886cf899d58b5a7f9a9d4496800bb9f3f5338a9d8ce07145eb7734e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWW2593217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed88b4e560d9e44ba26054785532e95d1dde503b0b877901d852bf2ed93a732c. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/GX53U2455221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e7c7fbb29bbde722d13f8e94c623c6d8234efd1bb919d9adcc07d1ea463805. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:50:35Z), 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/AUGBT2504214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3ae9a8d886cf899d58b5a7f9a9d4496800bb9f3f5338a9d8ce07145eb7734e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWW2593217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47477da5fd600dbe277ffbad99a8f2f7a4722f13e289e5f4544f058eeafecfe1. 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/AUGBT2504222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb29e2c3d4c9543c254fb0e8d682243be2433aa33b94a43121bfe6ab1f97534. 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/QZXLZ2543817.