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 0x144a459031efa7d4353f5991751798cb62fc80fc82ce256db032d7e49b5fce5b. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3fa5ea1b-e8d9-40dd-82d1-08accb01e20d.json and https://artists.proofprofile.net/proofs/artist/3fa5ea1b-e8d9-40dd-82d1-08accb01e20d.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 0x364af3e66d51542ae76364b5471eeb2eb67f2c5ab806b6027b1ebe132391a8a3. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZW9K2338432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c40125489e8e77dc8452d8936f5a502367a0f9bc86a628e4558945523e59e9. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZW9K2338339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9c4d58e4f1e88df0fad2c7eea2c09c412080b0d84e2924ff6e7222aaa9c71f. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:34:23Z), 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/QZW9K2354226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd05fc8715cd95682a0be0aaf013d82735fa3065714f2f924114e8ad766c1da. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZW9K2338073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6122594f29189f197a2fe50884d57c1e0d8292354cfcf1d3b3e978ba6ab5a14f. 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/QZW9K2337996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6f7f0174c0f511b61436d31a3d94f520e8167f59bf06c111af186357429fee. 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/QZW9K2338115.