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 0x9604984d131e9b7166e94ffaee48f83ce72bc666ed808fb80cff41cc0ff8c96a. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5801f4a2-8b4f-44c5-844e-bcd4a2bd1ee4.json and https://artists.proofprofile.net/proofs/artist/5801f4a2-8b4f-44c5-844e-bcd4a2bd1ee4.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 0xbc884937b3562afe9c909e6bcfebaf705646fe8de9a6afaf002c8677d3972356. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZHN52043597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3da9d595795a1ea60587ac55282ca26323716d645112d2dfb2ea3e3c47037f7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZMEP2038208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b6a8270093a790fc865a27853d43f36700b5eb8c24bcec4093c5a072b626a4. 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/QZK6H2008573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491de6d04a1eb3e41162543119609e648af4c0835ae4950553d95b4afb4712d9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN62164200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8ceb910ddb8c2fe6d20681136ca0e34158ff5675b33e15888ef20bc53423a9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMEQ2279649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cd7d12db281a84bd59b0687ec47dccd6804cbb0713ef353164d6b88347d2bd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWV2294757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065d91fd323c5a5452591e7e39fbccf503f7de268526c003061c53b145266d84. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:08:55Z), 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/QZES82388936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef11b1f87d098d6473b087ac1b2f2812dc38196a09488be69f096e46016e486. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:02:04Z), 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/QZFYX2597560.