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 0x1f4c8869ab4670f4f835b8d5ec5d1ffef14b0ec906cdbef162ac45f8197b932f. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7447bca3-6774-44d8-86e2-a8302fcdf0ab.json and https://artists.proofprofile.net/proofs/artist/7447bca3-6774-44d8-86e2-a8302fcdf0ab.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 0x69052d5d08cc195ef1c8e2e9798cba1a7c629065331bffe246cdef16342bae28. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:43:54Z), 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/QMBZ91319532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3c110fe748a8332ea2d5a7583c6377577a8b454d8b6d2b5d0c6bf75e5c281f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QMBZ91319533.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed4663ac8ad90243f02fb7c86cd220bbd3765d3bba12442e78a4a71bd51b6a3. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:46:54Z), 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/LTE031800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b67d905fca9665a3f362fd877b695f07c84977006c759d3aac0a6d3dec56344. 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/FRX452189088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814101e6bf54ae5257b24b704946b74aeef20fdff1822b67a40fc8a9953b5f75. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FRX452189089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ff8a51cbe188855d5c611584242c5246d5db7d83addd27817279673c395182. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:51:16Z), 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/LTE032500002.