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 0x2c5f97eb1f5c207a33f4c77188b4fd7846e736b6caa62e69a74c4d9f082c87ea. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02c71b67-51a0-4cba-b1ab-5f9bb2cba55a.json and https://artists.proofprofile.net/proofs/artist/02c71b67-51a0-4cba-b1ab-5f9bb2cba55a.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 0x13b494fe767ac0cfb9b699dc888cd60abbeb31a564bf69bb572d18118a984d6d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEAU30800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0570d49853828449cafab2a73641c632cd1f039bb6c97db20840839175bb75f. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/DEAU30800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ee15adc7d23620acc23ac86cd5108f193b9510b8497ba128ccbed35b7bac77. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DEAU30800042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84fce8ae77bd9bded9544b289cdcbe28131905a63c09e023a6f3b7fe8842302. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:01:58Z), 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/DES460300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22a5ad9d97673afd7ed8224a0d2fe4735054d75c253ec842cab44f300f954fb. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DES460300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba286065e28987778aa506a51691eff620e370affe19122ba755cbcc1119870. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARQIW2417690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4a7e253ef8788267778a906c846de3a50e920bb789fd0e4948eae991c1c711. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:41:48Z), 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/ARQIW2417691.