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 0x14547f6ccc27dc3b31827efc779ea9c653d36c0025cca258c706908386ec53f3. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0fe78d3b-6978-469c-aa86-8f0498831c08.json and https://artists.proofprofile.net/proofs/artist/0fe78d3b-6978-469c-aa86-8f0498831c08.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Em Nào Hay (From Thám Tử Lừng Danh Conan soundtrack)
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 0x0061462e422e0ac212d22eec500da84a0f59c2b2461509396176267167f9a351. 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/FRX282208107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad35e4dc6ca4206b29f6087113c92a5096692440b20014054e95040da649c36a. 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/DGA072265966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fd62f70ace6b3b31fcc5032a7a4551e884268c27c59be6b9b3f5eed1d553c9. 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/VNA0M1931682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d9e6f7562ff4c4adca8163551652a39cdfce79bcdff29365ec52480e4b5212. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:50:25Z), 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/US38Y2401232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2db6802fde01bbe39fd5ce679965c4dc2159aaa1a411dfe28922bfeea7850a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:33:08Z), 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/US38Y2542986.