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 0x6f6f6a19ec5d7f2f0fbc821dc5869ba5dad898e1666dcca64ff1c2c0f7aa08db. 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/7105972a-776b-4cca-9afc-a19f441c1250.json and https://artists.proofprofile.net/proofs/artist/7105972a-776b-4cca-9afc-a19f441c1250.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 0x7cd4026a3be27832f07e14a474d540c360b51c9c63ab90c0ccf47264720328b6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/IQA011800179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5d7f1f954a055ae5fdd30f90bdc4a3b0b4bf3efeb72e5640dbbda01426a0d4. 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/IQA011800110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93759967b8fa2a4817362e436a1028e80acb40631164b4c3127215334fdd49c9. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:46:24Z), 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/IQA011801224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c61c7f8de4e499b3f4ca88e0db015a240170a9f86326e2b89a93dabf7572bbe. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:40:19Z), 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/IQA012303897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa777bdcd8674e3658f6115a44d5486b16a1a6605aa7bdc6a50d51c825e192f11. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:34:12Z), 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/IQA012500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b68709bc367ee73855a5126bf554492a0238e8806b88f23f5808e3b0275aa8b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/IQA012500019.