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 0xd2456f3c8ceaf6b9a85a0fff3ddd57fe2e9c08c11e13943bba17b2bac3222ee9. 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/faa429b8-aea8-422d-ae8f-4c5dcbc9703f.json and https://artists.proofprofile.net/proofs/artist/faa429b8-aea8-422d-ae8f-4c5dcbc9703f.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 0x9ee31fe69b87c034a8e8891551379881e51dd6663e00f2524b3b128d0b396f53. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:20:06Z), 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/USJ3V2005355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05012e710923ef1bcfdf9aa2f529d58d874ee2e64a77aab4379ad631e57dc4fc. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USJ3V2195074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3051e7da74eed838ba4d6b46fc99d3dce095f4f0c2835f443371a4eb6027b017. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:49:22Z), 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/USJ3V2308680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2a7b91687269772a106e32c55423be77bdda478433d95989a39ea88563f774. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USJ3V2326482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9386ea2a8f64b1ee9ce90053000bb4fc8be655b39bd8154f7ef9d7b325e8ec5. 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/USJ3V2334443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8be4c76b56f8bb757306778226e633f3a6448ec7fb2ce6cc7a0fa12331e700. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/ZA40S2402183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a68ed8c1352850853d78485f4855d619a0387d3bb466c8b5212c0ee61eae11. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:26:19Z), 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/ZA40S2402184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9491b92861e233dcdf1b59a245eda469c2177577621686d440d2aaa2b55eea1. 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/ZA40S2500325.