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 0x282ade3bd0dbb83dc1da655b2b075f2dfc851c07d44cd0f588a11f9311ee5b41. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7cb41320-428e-4a7b-b226-34f074f61bfe.json and https://artists.proofprofile.net/proofs/artist/7cb41320-428e-4a7b-b226-34f074f61bfe.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 0xcf365b1b2fbd7c99dedb9951010ceb04f0fbe0e281594593b338f03a4bee3d03. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHNC1987781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa631d528fb4d0c2c0209379a5f9428a10cb94e0dcb5397ce0a297dd004fae1bb. 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/QZHN72138365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802e161151a90a6850f843cd3d0d6abaf5afa9367a1224e3483b30e207c81c73. 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/QZHN72138367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9fec09282e2ae0632eeb80ac6c073794af525644577e21353217c49bce5b23. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:20:17Z), 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/QZHN72138368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb14602e9bc2981b6bafeabf6b75e698294db35ab0b24adff12a20cc3b942672. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZES92455794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152789d37e06224d8a1f3091dfa163d729665a768d060ca9914cc2a71623bf21. 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/QZHN82462472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d7b968f2a08be7ad7866dd291bc20a8e84af362e5d7ec5559e70e4ca482d53. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:01:53Z), 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/QZK6Q2458661.