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 0x1fe1eb8ef9d08c9b18bd6b354ba93aacb6db3c3aeaa6633428dfa5b16215f200. 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/e191f0f2-87dc-4563-b899-789debf42f02.json and https://artists.proofprofile.net/proofs/artist/e191f0f2-87dc-4563-b899-789debf42f02.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 0xcf4bd8fa939f127d5109db622104d8b6cac42f6ee02cc3746c4bb1e47cfcc2e9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DGA082385113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d6fe063e01c65d9da534fd5fffa4ab6cd4989789c20c1aade273dd7f0e460e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:00:16Z), 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/DGA0H2495552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9817ac738c7264eb2061510acf9bf4f8cd1e561f6af953200aab0e3f30bf993d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:37:00Z), 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/DGA0L2451649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a896e7337ac848c56374ff2f5eba6b8cac1e7b7dc0309282507d249aa9a808. 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/DGA0Q2473541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16517b65863d6ee31ee4ab9dfa4622c233f3239d2e8e77996c8ded63b46b23f2. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:13:52Z), 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/DGA0S2470874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4885372e3b291f01a7882b165ce998a641920ec85f2624986aa32c0c3e41b8cb. 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/FR10S2537084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0c9152f313f0d7bb427e818c2a1316e201f803374e8fa69ed6f86b3aebc9db. 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/FR10S2589363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9879d0875d3169ecb6317f1cf39d7c79c0497988e86691bb66667608e24024da. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR2X42527900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abeee5807f0df83acf9292873a741bc2760f38789cf6cc2ea20183091a7ee70. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FR59R2543347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcace4e6f6ef3f408bda26a64081ff8260b1a273d3486ca7d07da637c1ec702d. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/EGWKS2536906.