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 0xc813415c4bd07cdcc6badf9d31ab12a1895851ada6b2ddcb8faf82737bbaca00. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af804fe5-a5fd-4cf3-ad73-d30099805050.json and https://artists.proofprofile.net/proofs/artist/af804fe5-a5fd-4cf3-ad73-d30099805050.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 0x78960a809374b596eee20d9310d22aefd20e76ac88dcf92192f89c94a9c6ede3. 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/GBSYA2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab3d743d2b225dc99a29b3b5e885725c6678e183d75605f2be91d57cd82c176. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBSYA2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1636993ae76386d5dbd6d9d8c58091552f4433f1c3418d17bae917d5bbdb2088. 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/GBSYA2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c3a589e0448ceefd6c7952b5def03e4178c6d83eb72f9fdcb2e98d841e1d81. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBSYA2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580d83ee56e3dc99ccab1a2e2066a4c3c67a277646dc7c30f5f6e4bc230b6b6a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBSYA2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1987b3328f743f233aff0a99fcc813e7c970e911833442e8998cc150f3406e1f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBSYA2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71bb117afaf0563cb5ab8f0f4a261c4818aba60c2236452e2a133f4588384db. 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/GBSYA2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb200df8de633ba6aa21f72495d1eaca0af92aa2481249575bf6b2dd2341a7d59. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBSYA2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dab47feacb4755370c2940935d2382481278be6a733012124cb3363ff4d8d2f. 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/GBSYA2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71bb117afaf0563cb5ab8f0f4a261c4818aba60c2236452e2a133f4588384db. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBSYA2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab3d743d2b225dc99a29b3b5e885725c6678e183d75605f2be91d57cd82c176. 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/GBSYA2000012.