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 0x40c40e389ef268d475218ae2ff8ef8abcba52c86350132a801bcde0889649e70. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1dd7fd8-9d38-4409-b9ec-41f0d0857708.json and https://artists.proofprofile.net/proofs/artist/e1dd7fd8-9d38-4409-b9ec-41f0d0857708.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 0x66c8b0f054540c53029b650eacdc348beb59de781612c5cb28abd2ff1adce909. 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/TCAJZ2587027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a83475fcf4f9e1930e9e2bcad1b136d5357791e069aabb6844fda80b2773103. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/TCAJZ2587011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227f0a2e511a73ece093e07448de0a64a508a065329e43f34d64eadf07400ff2. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCAJZ2587018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94158044a571bf8ec44f35efb61eec6994dc5953fd3805986baa166d287f7b44. 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/TCAJZ2587030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdce65dfeeb567f73f273324841102e4f31ddd276f6d09c22e40d150e19d355. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:03:46Z), 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/TCAJZ2587023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108c3a4361328437da8158912b0f5c0f8b20597587d41f6e751545d0cd8c5a5d. 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/TCAJZ2587046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ffc66bc85255f6a3c57761eaff5d2c9a7bfff8f2fcfd86c378731855575292. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCAJZ2587035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d070dfc268d8b6ba4e45f65b2769addb0fb5b33e0dc3d9cc9d1aaeaa9865598. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJZ2587042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6e50a6754472611372890c31b4acba3e5696c97c15c80a9d27a87d6c8df8d8. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAJZ2587038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0caa4219afd4793a64b5b88c01aa0343180f4215c3c0505954370e3c9c36f544. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:00:44Z), 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/TCAJZ2587053.