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 0xf87b61c417b8cc93eb740f3d89e6f6e932024e70e321e278f7453aa6e6afa045. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab037075-7690-4a79-885f-c95595576bc8.json and https://artists.proofprofile.net/proofs/artist/ab037075-7690-4a79-885f-c95595576bc8.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 0xa31f3186041cb49c8dfb21c1eae4ea31dd92900481908da5665675cb797f935b. 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/AEA2L2449649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8f6437dddcbb47e2b545335d7a044870a2b7aaca0514f16cfe54d3b8df0e01. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:25:11Z), 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/AEA2L2449650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd15e1da5774ab60ffd87d638aa869e25458aa2834b9fe23b13148fb5614309. 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/AEA2L2449651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dd235d284405c3d9a87f4129201971b5d5f12db867f1e7d3d900b5ec07ab19. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:00:58Z), 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/AEA2L2449652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ede95ada9751946e8238b446f4ec82e4ef8f1054ec3f5d7a3769373c38b6c3. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/AEA0Q2426118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbedb601c94805c163b7bfa0a9ded10edd3b6dfda57d7caff32651cacdfb6d5. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:16:51Z), 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/UKEX32503967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d7c59b8ec7762f57aac3685cadea50bb6ecb4d024357c5606a200ca37f862a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/UKEX32515755.