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 0xfa5d85a193ceb5447fc06ae18865640f74fbafda3086553f1dcbdbfbf2507529. 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/50b213d5-ec82-495b-b027-2aec493a200f.json and https://artists.proofprofile.net/proofs/artist/50b213d5-ec82-495b-b027-2aec493a200f.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 0xd16a00cbed3c67b2084cd54f708a9af4dd490c0652f4d3cff3aef3af331b3521. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6G2273867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99cef6b8723938b54daff0c1e4e55ebcddc2ab512260cbe11423b1ef539df0a. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZMEN2238711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dccadc7c4f30c66787deabaabcf41bff2fb692a66b7a09d90dbaeeb575f99c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZMER2242096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0093e102dd96769ece3719582890ede078b29e8b7234ebe1871b410d1a5676ea. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QMDA62224548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb414ff38800e09937f8799018d72a31707bf097494c93e641efde2d2d281df5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:38:43Z), 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/QMFME2218015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5daf65e45a2cc0d0aa1ee03b704e784ebb35c933258b9a3bb65ad37099c3bec. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:34:12Z), 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/QM6P42391826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1fde27a0743840158bd75e30fe39bddf44ceb945e13610984d812a3305b146. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMFMG2323268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518ab1f79fa45acc86528d5b0f438363be45861f86befd3623571012b7f4cdce. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFMF2354369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7f20525d51e0ac7fd4909dda68ab94c19a92ee96f2b59d5cc2d48daac17d02. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMFMF2354370.