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 0x06bb9a7666f7773d7425f3c49b2cd33b8e0dc3c36f5e381889cb967200bc466d. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d61a8cc-b6e2-4365-8891-f61e280e152b.json and https://artists.proofprofile.net/proofs/artist/6d61a8cc-b6e2-4365-8891-f61e280e152b.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 0x1233f22e0baba99d29e532551a5e93c839374df25aa74b5887d70efecd9725b5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFYY2337546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c939fdace9d1273ba6f816ab9d1ab2ffa8b3bc6725cb60934cb441e3376efe. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:08:16Z), 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/QZNWQ2324399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647ea33ba90bd36a8e045448114c8052edf87bdd6a2454a52ff3db01ee80785a. 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/QZTB62313866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1471f0ef7d7ac01a01aa1a149d1c959bed6919226c1d34de171acf56f385db. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMZ92589027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7b532827107b471f17d05f205d77abb4345f873729b1d2096e8c6e55cbeadd. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:24:53Z), 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/QZMZ92594305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a6e8629553df768f286c2f9d688f40ea8d991641972a616f0393c8bf82b9d1. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZMZ92589251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fcc73918ce2e6b973ec2f6f8486424aa95fc02b41901f636b323b1ce6992e1. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:06:34Z), 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/QZNJV2534013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261eddb29404de9a5819b6d1b0c051c869ece92943e27b8804a853269887f19a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNJV2590961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bf9c2b183bccc4db97fcc1c1c1c3b32594936f229a435d46735870503b7ea2. 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/QZNJY2563181.