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 0x32833a7b8be579cc6b314f6b866ccb8d40948e35feb52d4db83956e9546d8c1e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8389b1ce-2010-4969-ac86-6320b6ca31ad.json and https://artists.proofprofile.net/proofs/artist/8389b1ce-2010-4969-ac86-6320b6ca31ad.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 0x4a41203961ceb51a7c95561f81b129c83bfe3dc32ee2937e4b7a7af6cee5d020. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZES92114421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697ea07e930b6e2377da1d90bbf2353c0fd9670a9b43ee2a9f5c5d567beae07f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZES92114423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edfc3560d09a7fa5eb6c66a0d843ba3e880ff84f67fac6a53d92fae10ff7c19. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:17:10Z), 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/QZES92114429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b25779dac7b77b2cc1b827a14665adce20c8a6120a2f8576624c04913f762b1. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZES92175307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93f6c20f67c2a9006d70c4201a5b00842e8c616858a8425177e3e6fbcc413cb. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZHN92192941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb975b52a947e798e29ec48552e799dc935f652647ed6d35e5a3f2ecafbaa8cea. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:45:16Z), 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/COAF42492994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a7ed6111bf652f96978151aa13a820e4eac702111006dda9bd206f67e207c9. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:50:24Z), 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/COAF42492995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f95e397c34e5d23948868062a652506440cc6c714da49f6f2d9d73c209b5b7. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/NL8RL2447117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049999510f9d3ea7b3e42f88bd8b2445a1a7d4d4b5a609726c327827c47cdceb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFJ2552195.