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 0x5402bf70e24a48c10ecabf514966aef35b691bb04d49982af4388e7950adf8c1. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6fca1852-83f9-481d-ac89-ddb9b5ba3d5f.json and https://artists.proofprofile.net/proofs/artist/6fca1852-83f9-481d-ac89-ddb9b5ba3d5f.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 0xc5432ed3987fa2c3a2c83b9241dcceca22566b3053565e6e77cc87b2a6560a64. 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/QZS7J2597753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625b68bfb61dd676f4abb66aa7c9bad0a0d67b921dc66ba13b399d8d450dfa54. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZS7J2552291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062af57a355916db4ba82e2b3910646400805d13574462386255ce5b13a93913. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZS7J2551291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689b91761c71f471bc95ac3ddfa9f65bec0e4b63d77a8f32049ef5d66f9b9e5b. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZS7J2559625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3e837252129687b39592fbffdd6f19940fca75a7ecdd8145cd63b1060f982e. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:26:11Z), 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/QZS7J2544088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7453f037a4cd00343b5a128864ffe374131ceeda747d7e7b056b7de4634a8e37. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZS7J2529659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fc469f31beec43a758258aa821fec7bfb1f4f654053f85bfdbe494e78882e1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZS7J2525226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d26004b252dcfa5e2f42e44da72813c0fac009b402f728f5c68bf2ce5d7f3c. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZS7J2518531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9011c06bcd78065d9182cc0e78df05c9d0b7d1e25063b327aa97249951e1ea44. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:33:52Z), 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/QZS7J2508124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2f137917e505f7ccf44244c1e88531f549a0dfd6e16521759fe90f0ee2eb84. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:38:25Z), 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/QZS7J2569853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20886879e7c1f2c0944c9701e34767459b194d329e4cb6b2091cb84a86a9db56. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZS7J2513117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cbaa2e2bb316635677f723e9a9e6b5c7e94f4f0190070fb9c4df427899a336. 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/QZS7J2598829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ba4bcf4aa8b5c20f335bef308affeaa4b0e9a1bf9b4d1f89b99c65ed5f27eb. 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/QZS7J2511946.