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 0xa83917703a2cad34fb91b0719ea855b0799e2bdeee9ab5a5a72290a2ee98e06a. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1fc624e-a0e6-4459-9f4e-7349406fd5b9.json and https://artists.proofprofile.net/proofs/artist/f1fc624e-a0e6-4459-9f4e-7349406fd5b9.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 0x6fe880be4e369f31105134481605ba28bfb374c877a4a728d8bc95dad9cd97cf. 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/NLR1K1742011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4588026300f4ee7d2a3a082c76c51be291e9327ebd5d64d73a1ea3c2b03ec34. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:57:15Z), 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/NLR1K1742021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd315687ebcba1bddf7e1905afc33bdf0c159b0a5ae7a5bb801c929896e46304a. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/NLR1K1742051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bcd4619f2a14e7e8541d9c407af012107de1fa633e3c5c00a2ade77bf2f294. 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/NLR1K1742061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10657c63467d848c76e234365935ad9a8fb292ea3706cfac764bb7ad946d9220. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/NLR1K1742071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf4b7ffa17f265b7752dd2f26f3706a3b6dac4990deb2ef9bf347a5ae0e3afd. 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/NLR1K1742081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb26b9eba92bf854469b9b161da76e1e4ea50a96bf843c44fc881dfba0bbf93. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NLR1K1742111.