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 0x412bc3bcbe26a4ba14188aaeb44d26e1fcfeb1c051fc73d65f3ed11cb8cdc145. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c686e82-cdae-49f3-92e1-c183fd80137a.json and https://artists.proofprofile.net/proofs/artist/2c686e82-cdae-49f3-92e1-c183fd80137a.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 0x0d0f1ac2f94f56d83e8d7a595964adc8fef085ee8dab9c57b657da63ede03500. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USJE70810035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009750ed06b156dc0133c0cd6e149bcd0cf4964c4d6ee60998c4d1a9845f9790. 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/USJE70810036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eeeb4490f6e7e8afc8567335bcc37ab296aaaddd69552b370ddfc57c4dc04e4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T23:02:36Z), 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/US2642453801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc952e62132e5d7bba6883094425563361a36b461a16824335648fd880587a4b8. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/US2642453803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e68a4bab3f7d408f0e69442f2833a260a71f93e8971e5ceefac8cafca6019c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US2642453804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c9390da11f19bcdb3853dc5d8578f680d71092f11b0aa591cbb3c0e51740c7. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:35:15Z), 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/US2642453805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513645398c66a24467b65997678740e241bd4e82393ab27a0393ee1281868eb8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US2642453806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ff3e7b29ab87eb2d8d427d4696b7e78ede494a83da319fa69feb3af723090d. 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/US2642453807.