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 0x9da221ace4964eda88d6eb6ed04a7a7b083e8b8c0a76ae52941f88f2278eecf6. 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/6a51a4bd-ee1a-4cf1-80ba-06740e4b8559.json and https://artists.proofprofile.net/proofs/artist/6a51a4bd-ee1a-4cf1-80ba-06740e4b8559.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 0xf2d922ed3a2e2bee6828e54f4146c2e4f8a90829b050daa9f569dd20c2a3886f. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T15:57:14Z), 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/TCAEN1956299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a24732edde58365559a95c454dfc456680b3aa30579b60c8dbff3bf51f6770c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM82039185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85d30c186d615d292e0d63e003b9db91f4cfdaea6738a9e014e025d864e3a30. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:31:33Z), 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/USCGJ2393636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dee47e2646543d6b88f1a868180a41f3542c2c5b89ead253a5017a5465e0d4b. 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/USY242496397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7459b0c18ef123f3e63bce72827a926e158e1d8acf242189cbd28012160ea4b4. 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/USCGJ2532960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc308f95166ba6e53dbae8e8832f3898fb2f85cd349a3ec12f0d47c7d685d9d52. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNJX2507572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca65a7cb4b20dd1efaf7fba1446f60602dfe83900e7f9c661dcaa1f8930b3d0. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZNJX2507571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079af44b680a29db130de68e0b7b6b797b4d368144ff563dbf3bc44199397d71. 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/QZNJX2507573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996336f719deebccd40e5621495d32982cf4063178ac001a9ba6a136818e2b88. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNJX2507574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb508aa5b3c59e154c9455fd0b239f20c2c9de13783e56b422c1603cd33c55912. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNJX2507570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03dd7ec3ad424934fb394d093869634e276b326f31dcedb535c2fba2b5918d56. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNJX2507569.