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 0x21252203fa51b0ae1fad5f412e679861266d50e8a09b8329a8944f0328e16396. 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/d00e7071-239f-40b6-870b-877d4a421308.json and https://artists.proofprofile.net/proofs/artist/d00e7071-239f-40b6-870b-877d4a421308.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 0x3b991744be8acc45e17d643354a0d10a9b7342b5f13c99c219156e0a0fe5e8bd. 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/NZAM00801011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997eea49bdc35c835d6f8fefe908954849e684bcd5a459101ecd3ae5a0817ad4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NZAM00801016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acb55d432ce6ede7f7cd3f330af33ee5289fe24ed4293bc81c7845dbdbcede0. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/NZAM00801020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde89f32f1bd509b0f7630e6b60eb6aa98bb7398dfdc65de189d9300404d5f104. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NZAM00801022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9e1aaad48713530c3c25db04ad497b62e0e54f408919b030f82cb2b904c65f. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:51:26Z), 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/NZAM00801023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fa678d4d7a11e591b88472842558fc47cca0b1b4dff818512746fbafed791b. 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/NZAM00801024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50c7dfad94c65008357218e0724084f606bcd9befa765bc510866fbe0f4c7c4. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:03:29Z), 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/NZAM00801032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cf5f69a82addb0244ea3930e6da426b27e28768c4fe99a1d9d191f02ea77e0. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/NZAM00801035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec70bdbe152f718bb13c34b156d4b194f233320515c929647e26e50c7aa8359. 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/NZAM02001619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d0e8d82eaf11af451845739a22e945b8d2fdadfd9bb3b553491f76b19283d3. 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/NZAM02001620.