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 0x4d1579d10093208b9a038ab12965464376cc8ee2188b74885cd92e64acf00a12. Chain 2 (Bitcoin): anchored in block 954028 (2026-06-17T01:08:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/393d9277-7d25-4dc3-ae88-9b9a68f8a50b.json and https://artists.proofprofile.net/proofs/artist/393d9277-7d25-4dc3-ae88-9b9a68f8a50b.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 0x3fadef8d0b82e25c496590c099a001fd733a1fbcdcdcc977b8928988b2bca4d2. 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/QZDFP2086229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c4cc6b8d109ee550afd1cbd376b053a74a98456edde88ba2c5e24a74238c2d. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:09:04Z), 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/QZDFP2163137.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935cf6bfefb76cc5114e6c1e2fa8010bd268456ea2e7ab29b47d1c8aea1d23b4. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/QZDFP2168597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eda1f5781af7360a0659b363f7c5438702c04f62bb1666e48ed0882cd9d0452. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZDFP2171474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846cc76723a164560b384faed0b919370b131685debf07c8147ee89bd25bf3d8. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:06:06Z), 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/QZDFP2171367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036f3c9ea249c674e564a52294f2bd020c39f438fb0ea9b0f3df62d8be2cf24b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ7K2555703.