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 0xfd201ac507d19f07d2fb91fc42e843912234634235324fa7c517977980a297b0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05c0587b-356c-4143-98ae-6a231de94aad.json and https://artists.proofprofile.net/proofs/artist/05c0587b-356c-4143-98ae-6a231de94aad.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 0xdae22fa406df6d549d9f5e2076d7e77eadd1ccddf788d195f1bc117eab661870. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZNWY2119211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11dbe6f9c8bb531a18b9c11b60c6638f3035950486e60f9e844b1b95ed9a8999. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZNWY2119213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c707e5c2f7cb6a5b8abd906e47633076e71d8b5aaaddbb7bdd84a708b282e3. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZNWY2119214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8326a8f30674ca28d9559d55d229c2b695f4a79693ad739cbe8f3761ab033497. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNWY2119216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a21f29094321f402771b3a87ae981b6103e8ea5d399b65d8439913a5b2d1e58. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:09:57Z), 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/QZNWY2119217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4552f038bd74e1fb245714f6ad49f4f6eea0904ba49340a412b8e945415b9a6e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWY2119218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b9b8eb65c70b17d95bed00d02136f3489c3099b80a70d2dc7b511571c22c5e. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZNWY2119219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fee3443ee4fa802b88eeafed30d64cec6a431fc47232c2e9b03a42776b5ef7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAU2204851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe095308982641e3639f1cd80c1b8e9adf1ad77a150dab184c40a94b8f287cfe5. 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/QZTB92239475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb827be59a854eae5d933c486750ee82b3d8f3c24b1c10bf40815b34db43b992f. 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/QZES92341902.