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 0x81690317ee0f69ef05cc5f84f5758883bf15b437d8a6e6bf549a8dc0500a0788. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c6a5849-7ea3-44ee-991c-bb53d4577a6b.json and https://artists.proofprofile.net/proofs/artist/3c6a5849-7ea3-44ee-991c-bb53d4577a6b.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 0xc0caf36843a29a3fe91b401f7aed4550d628b544b12e17336f190703c63e8d7f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:10:50Z), 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/BREWH1500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968520592bbbf82071dcf54324a855eb479fa6bce217c1406bc6554c3a840f95. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BCHAV2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7387d609dcc0f1b5375efbe6dd8d4d4ca6de49cc34dd3731d2136f5b2f10ce. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BR5SS2000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705b45299058cc32e1e8b78e6efce73093bdb09dedb9a677dfcb10680c012254. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/BREWH2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2126b1dfdf69c3654f4d93d5e6337c63a517cbe1740ec49b7c3641fcb2ce39. Chain 2 (Bitcoin): anchored in block 957625 (2026-07-11T23:15:09Z), 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/QZGLS2511787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f9ce81d5a50f659448e241f107f56c322f92f62bdaa1319dde6f16b5a28d02. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/QZGLS2511788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71563930196007620668c614ece4f10aca29050f71d06e695571085fe7742a00. Chain 2 (Bitcoin): anchored in block 957625 (2026-07-11T23:15:09Z), 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/QZGLS2511789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9872a703e91bf31992da9908c37666b57d8b4b07796e6c0719c96c231b8bbece. 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/QZNJW2506132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eac67793e9eb5c8bd769c098554e5a64de676b66613d288196fa0683baa54d8. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZNJW2506131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ffc1c2aacaa7e8a64c1facc49b651111be7bd316cf25746be66616a4e20b22. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:41:04Z), 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/QZNJW2506130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066a40be736739b8c0752b9fcd204c0c9161b448ab62c8e86c820a2e96414ceb. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:55:32Z), 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/QZNJW2506133.