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 0xb26b7fe584e154f9615325c14e73fbbe26737f65a10d7d98a392c3391a116db5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46cf63ab-a4f7-439c-8ba0-d6a238414cfd.json and https://artists.proofprofile.net/proofs/artist/46cf63ab-a4f7-439c-8ba0-d6a238414cfd.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 0xcce940abb0d21d400665a275dda758618ac392d0d8d237a121b6cc65ef5785d4. 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/IL6081700067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ce46994ad14c0da4141b7be98e586dd402181a9964f48e7aec57e20f86b9ab. 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/FRX452009319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d729b551f4fee4eb465cb2a2e083895415ff95a3a351a900019c990b3eafaf. 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/FRX452009325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418c3338b1a7f512b25ea6e3ecaa95709aa700d26f76dc393b5d487ede8ca6f4. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FRX452009329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbd5ed8bee67bbc4f3437771a5de7e2ddeb330ad69112c814dc1bd2f869923b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DETP62200093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba153a4f481e96b5e3cc6ba0073249ad319d736a5fa83bd9c876bc1bc6c975e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DETP62200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5178cfba0e59a7f0f3602b60954156457f146db2125657457620a93d954b84. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/DETP62200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886c2468cd6c9c7ea3d1629d28879ccb17dd5dc4f52999e411a86d11e4229e00. 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/GBZG92400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa88c64eb071e781c2d14dcdf1bef31f96842bb04900c0b74dad28b58f1453b3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBZG92400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eca50b6fef348f967536481fd86d5a4944775520ff083b71b6162e6d9c1d2c8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBZG92400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a90146ad239d1f07ed43af59b22ea00b13f5f0b87a07e061e0121ad0ab7584. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/IL1660800047.