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 0x955ff1508710c6bf4ab6d838c64da189e7e583fc4fc35bf8349a962edaa274d1. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42f7bd8d-e320-4a50-bae1-5e7eee9447bd.json and https://artists.proofprofile.net/proofs/artist/42f7bd8d-e320-4a50-bae1-5e7eee9447bd.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 0x6e15eb7c775a1c3011674e00c891fb4943b175d974ba63ed0dc5ac39cf652a50. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:44:03Z), 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/NL4CP2506960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f587e0ed728023af92027bd47fbcf474cc34de6424bfd8be342465293a8bd8e. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/NL4CP2506962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68257cc4607f37979f203fcfc4e00caa1535c8ca7efc746c90c42cda646e407. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:06:57Z), 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/NL4CP2506965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be140578984154a2ed0e06be12fc21e564903f11313d6fe9457abe0d06fa746. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/NL4CP2506966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93b9731e76ab97bc95c151a1ed071948e6307b76df81dc25150611fe99fcdc4. 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/NL4CP2506968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe291c0012ec72ae89f62227f6163267380043c7572c8891232c049bf440cb4c1. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/NL4CP2506969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba75ed1c8c91e36b21375decfa5075418a938e26a396346aeb6b8bf15ebd774. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NL4CP2506970.