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 0xd6e534fd6b8a1d92994d899d5bd444ec9e0223f3105cd2f4aaedbd3b7ece640f. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee218c8f-32e1-4a31-b1bb-f1727b866385.json and https://artists.proofprofile.net/proofs/artist/ee218c8f-32e1-4a31-b1bb-f1727b866385.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 0xa35286a47d6a84291ac32bb362e10dd57193de8f589765bf9eb88de696765ab0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:11:00Z), 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/QZS632434314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37a12631367c5b3b718808bd4790477282e38bbdf1a9b0656795f6992b27e17. 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/QZS672400511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34990cfea2677c4f9e3e2a317075a51e7fde6436b581df70be5ef41989193e23. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMHN2473708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cacc4d745330f7b5d0a04256c68ba1a9e0f141de611e583f950f287dfbdd5d. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:58:49Z), 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/QZS672442034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b854a95975014a985402e4f1af50d0658f59cf622ef644b7b4fdb6be2824d3a. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:35:50Z), 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/QZMHM2492726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a236db3454e2e22a11b5db2e5c81b491d42dfdbfe611f1705d4d48f6eb1f622. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZMHL2490812.