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 0xb207959e85861a26af396a0d4e3555720263148c5ee446b8d4aa76551d32bcd3. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e21a7177-01f8-413e-a423-7a2fd1b961af.json and https://artists.proofprofile.net/proofs/artist/e21a7177-01f8-413e-a423-7a2fd1b961af.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 0xa278cb7786983c9e274864fae9264ecf88e7e430d887f196f60cca8b7c217a79. 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/QMUFZ1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a70957546be6b2cb82830213a27f9eea4c72b61b690b10c4fb128bcfd33dab. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:17:22Z), 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/QMUFZ1100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcf12642d2874cc13760e83e8e15a3fe519de5fa114e69d191aaa33f5077e19. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:37:36Z), 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/QMUFZ1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4049abaa3886e51cb834b2511cb448bd92731ff555e6c3178f0f485aba7a0a2. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:20:51Z), 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/QMUFZ1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd828720c9e7409d4a0c0edac2a326874e78f1bdaa9ff56ded5071c8c12ce2472. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMUFZ1100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59154d3a1ed77a5654fe4632cd4f1a139c413782417cceb3ad99b89b7554f9f1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QMUFZ1100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca224779ad86b7ea1e4266cd5cf203f29fa7068bf1cad487922532703056a1d. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QMUFZ1100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89604694dd1818b8290dbeee7d5ff451863b793de8e7fb76195e67ae40d83fc8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QMUFZ1100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177935ab3255740bd4ae923e680bbbf9359ebe5100f0f97810c95f2992c9a58e. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T03:55:43Z), 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/QMUFZ1100010.