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 0xc27f778f76c9611127019113327cfd2ec5afae8791e37ec1a82640de1a16518f. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eebcd691-0a3b-4110-8f29-4c01bbd3315c.json and https://artists.proofprofile.net/proofs/artist/eebcd691-0a3b-4110-8f29-4c01bbd3315c.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 0xf02201f401427e5fe3b4b4227fde60e424fcda041f228538a9fa72fc4e7bdd9e. 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/QZNWQ2203343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737c9b9acda21d80769ecb576d5fc715f64cddd994fad5814b07b851004782f9. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZHN72482631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163ccb2025d7c351b2b2013139afe614696b3ad682583de0bf5210e376f3a985. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:05:46Z), 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/FR9W12422160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbb286c2ef2f6ff7ac99389b0106c15559e12d814793d239c412635ceef20b1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTAS2445892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd60d70faa84fcfa2431f8f479b0d16c1eb7a6bb3461f424ffb2c64ae9bb5e2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:43:15Z), 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/FR9W12525982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5932c0863aefa55cf663291e824a9148d83c222ab65928c3067cac10a17a86de. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/FR9W12547696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5f2d8b75d4245e5047b4c6005623d39ee14dee0cb2776622de97c30efb354f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRPZ92508760.