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 0x181e230ec7f171cdb9ee6338a7073e095a849b9d91bc448a4bdc68dd873f0434. 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/7c2635e2-0d24-4d9e-9ae2-725b3de0a354.json and https://artists.proofprofile.net/proofs/artist/7c2635e2-0d24-4d9e-9ae2-725b3de0a354.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 0xf9ea5f46d7733026dfbec43c9812deada89da0d988d4a10e9d65f540f4595279. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWW2117760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb7dfdcb62d0156b4bc0792ae197a47f1d48ad7504699380e58bd321222c6aa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL5MF2100543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98af573d625f3bb96f57a067290d72a7c3933c9f0257e2b71beda954ced07ce. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NL5MF2100700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488b7240eeb78e70d053c794eabc341811c814a1d3dbb3b161dcdd8aaf4d8e25. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/NL5MF2101743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9982c9830d411f48d6eb0134e09b1c590b8c7a9503d0bf440b798965237e0b51. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:46:18Z), 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/NL5MF2102469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6685b6196532c116ad398526d8edc1fb273eb26810c9941dd0eeaeaecf50c8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:23:49Z), 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/NL5MF2102567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaaa44b25405efdbb6a97fafd40e8e10d72122a5aeb67b73e38e00cc77e9a86d. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/NL5MF2103429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb92fd52206d13b5cf1e3b52c20b5b4ab003ee40d615763a676c5055f9e38378. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL5MF2100718.