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 0xed6cc394286f86083ff9c596d313b811ad728761c9837db67722646dd058f1c5. 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/5042ac94-949e-43df-ac0e-f980c2886210.json and https://artists.proofprofile.net/proofs/artist/5042ac94-949e-43df-ac0e-f980c2886210.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 0xb15096ed4b0e345c7d50b7ef8352b5adfebd034a5c75f9cd597a1bd6f2bc713d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/FRZ052300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217d6aac13a7f3ba46c11ef501d67993c11091a326f9f4c46407939ad1c7fba7. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/FRZ052300097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa919dbb71fcae4a17772eaffb2becbfe222cb82db7a0e3159182598001d992fd. 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/FRZ052300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15096ed4b0e345c7d50b7ef8352b5adfebd034a5c75f9cd597a1bd6f2bc713d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:18:37Z), 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/FRZ052300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351b9e0831ef2a24bec5f5984b20379871b180ef63e74a2e9ccafa0740fba448. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/FRZ052300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639c4ad98d5342fa3e71bf0b1923d34b9717c3dcf9fff1b1e46a1bc8d190c4b5. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:16:47Z), 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/FRZ052300099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302e4d635a17b361a93b5884c4e0b19c6164e4e2c751e9fcdeb64fd27cb68131. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:56:14Z), 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/FRZ052300098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf78b3f13aa84f7f4bcb60d9bdec9a39023e8d0defb0ebb6c2b21175971aa9e5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FRZ052300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b10359614c2cada3a59987f762ebea7383c7745302b479b227e40e91bee0584. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/FRZ052300107.