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 0xbaef204fb98628470a76f8d3372ae75558966f15c596d711c3edb208bcd12599. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e073c10-bb2f-4258-a2ee-c40fc5db846d.json and https://artists.proofprofile.net/proofs/artist/1e073c10-bb2f-4258-a2ee-c40fc5db846d.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 0x7a839327c920f87ab8d0701e5e7df7f5e8317ac85f948357f556fed7b15933b3. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZK6K2266738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3781d0825d7034a4aa8ee22df0cd5132fe0f807de232d5d0fe96b0e160ab0df5. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNWR2251111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb300eebd6a423af9d0ae19e0fdb505bf4da5e5955f28eae7f36adf72539f4e57. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:27:22Z), 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/QZES52373783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cf316df8c157aea73b5dd9268fe815b43e59c1825771eb23eed9053e2db1c2. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZTBA2339380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1b9a7812ffb22c8ce90d7f564daf9d992b4700317afbcfa67c416af9496f3c. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZWFN2341614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d63f1d345545eb8bfca3acdd3ccb7cfe94cfcbefaae5b1d7c25c284ec65e38a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWS2410996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9032c4a48cbacf6cb3299e8eb2966d1324eab0cc4d18531151ee4f6be6eb8d17. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB92430095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8251f00214907dcf91bc57a7f21bbce57e6f31f378989b85f7f0ffe791793a1e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:01:24Z), 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/QZTB92430097.