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 0x19fce0b957793ef13dd22541e0eae6fa21cfea599e41951c50eed0433375d734. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8f0e0cc-5b66-43d9-9bdc-b21fe6516564.json and https://artists.proofprofile.net/proofs/artist/c8f0e0cc-5b66-43d9-9bdc-b21fe6516564.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 0x87294746e918d45502841c594df581e6b5dd5851a82282ee48f825edebd86aa7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BEK019800260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2e4fd9fffca24e7bc734b366f18240094730f9bc7683bbadbbb1651090e793. 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/BEK019800271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f3350e644144eb281714bc3902bb01a060672c0788c122588b4b4a3bd3b3a5. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/BEK019800261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7b2dfd40e5a291831e5807f2b7df07a157f9680aac3a4b2dbede8a2db07ff1. 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/BEK019800262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a4ba8ec907647079400d02adbff2e1cdd3a345ff514f88c5e1f0394a167b03. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/BEK019800264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab83a1603b678b7419cf361d5307633dc5dfc5e123f61d32c1a1094704536df. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BEK019800266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9c9c04f7c643c49b05aa41a20b02f01d4c1153fe3a0337925c8ff716c16344. 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/BEK019800267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfb8712999526284d48b28180a696164e7b0b69d95143cc4243ea3b87b2d17d. 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/BEK019800268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6853d78ebfd85edab8f73d1a353ac807caaf9d3f5e6d72fa0e9dade0059cbfed. 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/BEK019800269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedb66c80fa1725ac0ae87a5d047585582b00bf29391687480b86c9ad5c8edf6. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/BEK019800270.