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 0x803eed81ea0c6731692dd7123ce4bf32cc852150f78f9978ff7a7bba1687e171. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01f1722b-6ef7-42e4-8f43-1c676cb6d609.json and https://artists.proofprofile.net/proofs/artist/01f1722b-6ef7-42e4-8f43-1c676cb6d609.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 0xd521513a2812cf8bd1ca23e3585747478d51a4b8f5e1ad6a92841baf68b45476. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZTAX2331211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9ed1b2edc29f23c59f774b0642c7231c97a8cf23888c1753613e9d21eb012d. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:50:11Z), 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/QZTAX2331212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480ad2334911ef607a4b1b8cce0e3164168994db65b4f85752d616b5cb2ab2d2. 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/QZTAX2331213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936f239c3f9e3d7bf04e08be95e7803c839626747f7645731a9abf423c7717d9. 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/QZTAX2331214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aea9d0183f9645cb20fb380edf4ed4ebac8f412cb3e1ff0a4130597a8be5753. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZWFE2467466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c7d09d9c8c84468024759feaa84e06d6f62da70a6e70dc3e6e1133861d49c4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6M2326987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb0f2fd539b96b61c549619ec483d0b0bea697b13b06c153c922fba8a78bf67. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6M2338779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4498d1d6448c949e76bb345ce62318d1030e6e9c5f6513a6c0c3366f024a9ae. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:01:15Z), 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/QZK6M2338780.