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 0x5e5a9f24fe923954a31a7d155726899cf7d3b93a75daffcceaf2d0c9a262190f. 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/6321f221-de0f-47d6-8821-6f4bb79b12a2.json and https://artists.proofprofile.net/proofs/artist/6321f221-de0f-47d6-8821-6f4bb79b12a2.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 0x872a2e2b87f53b218045e34c565089db86cb27c03ac33deb8f7bcc64524b2df1. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DEM070100281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705cec27963d648dfb2fa8194aa20e44a679271b9c40f9a7f6ec526acd11bba9. 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/DEM072000199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa714660e90db9cd81536ec4366f4e33c06d92cb2808eeb3568c41d63a28407c9. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DEM072000458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb761b400074d99361c77dd5affb0da3ab4b5e44a5d34c69eba3cdce4e9256789. 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/DEM072000459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5b3671d8ab2e8e1e4cb8f7eb9b3cfda52a5181fb127b20cf0a4caea0bbe98d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEM071700166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657d3a51919e63513629777ba98a9dec90bad9c022e95a60fade5b65668956b9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEM071700172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4344aa70129b47c1932e829f4d943191dff2bc597765764273c5b29823edd3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEM071700176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6fe67688302240d94eca77eb8f71a66035642e6fad3342de8078f07d4963d8. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DEM071700164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13df2a3a619c43d80b3160fdb94e8754c6d53994a7c746c0ce2ab37f6033736f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:50:54Z), 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/DEM071700187.