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 0x55c6bb4e2b848d63ae69946d95fb40909aaecb8b039ecec3c24bd139697fc04a. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4cbeaca7-e8ef-4ba0-a646-02193e8a9925.json and https://artists.proofprofile.net/proofs/artist/4cbeaca7-e8ef-4ba0-a646-02193e8a9925.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 0x8afbf688bc1fdf441b8d270f549e2b7986200a655446f56bb7922db5fffb5774. 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/QZTAY2485408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0697d1ec438b051e0ef6a401d89aea063377b645433309c35a9e4853bf82c4f1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTB82482517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1ab48e318f554cb7996c83d9f62b766ffc580707919ab96c0390f26c5797a8. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZTBD2475242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafef474ce3f8d20849823b5d9a9bc247bb6be19907ed702af4533ee18872fe4. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:50:45Z), 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/QZZ7S2507624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653a065dbe98d00e5cbc666c44dcd46175eabf842461724f4e552a9a6e7b967f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:29:23Z), 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/QZZ7S2510429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d903dcb3b525993905d03ef3255241945026df66c6b27564d0f2720aec05be4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3F32595855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727ff7561874ec68f786956e8a0134734a387071d983326ec4cdbc6fb853436a. 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/QT3F82558136.