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 0xdaacadb6a1561e468f1bf5c706f0ecd98d491b383b37c3d960d31120d8ae3779. 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/3d3439ef-e16e-480f-9c8a-cd82eabc019d.json and https://artists.proofprofile.net/proofs/artist/3d3439ef-e16e-480f-9c8a-cd82eabc019d.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 0xcad743ba2fc2b2f06874a34623709ee607e415bea0b2a0560438fc5f319c9441. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZ5AB1860959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4203d9bbf54f33fb6f1dba784d8efc43237c795ee921bc5cba30c1381e2f3f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ5AB1860960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5e0517be55d77e8f93fa63525e35ebd41710934ac8cf7ea7d3e75928706fd8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ5AB1860961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86e35e237ae276c79ca8ce8477759a621764c4386f592666c1940c302dc5324. 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/QZ5AB1860962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6ee5e4438fddc7ccf00d51f6b1f57e770088fb7d4279f7c481f293b99ddadd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZ5AB1860963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0e6d2d954388e5962e3e6898683bb9510752f2a34b12ea1e8797247c74f835. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZ5AB1860965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35c5ef4873f5cc9375ec2316457b40182acc99eb0d9fe7b80e6dce0a43b342f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZ5AB1860969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ff8ea9565882ad7e8e6cbf1048bd47502c1a9be0db32542330eae487e17f71. 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/QZ5AB1860970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dbe9f3bf7b94367199f7df4e58221b0782158b36bd65d9c359524b52738cfa. 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/QZ5AB1860977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085ed2ed698ea2a102f154463117b17a4b0ec6d7303431360b23de2a244cbc91. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/US7VG2071453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0e213e981d7fdebd8cc519df240c5633f3ad3e8a5638e1883e36ac917041ba. 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/QZGLS2466743.