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 0xccef707c3f32662bb170f4591a6a979ba0bb9389456ca808148a6c8b686bec53. 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/ae612666-dd0f-4471-ac5a-b39e97a50f74.json and https://artists.proofprofile.net/proofs/artist/ae612666-dd0f-4471-ac5a-b39e97a50f74.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 0x29ca1d32dd8e61094b1804e4e237cb3307218fbbbe60d3dc2b464cfb4eec742b. 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/CA62E2000257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9500928263004cad4d151cfe2930fa18b86275a56201d1d4a0e27093d32a73. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:19:30Z), 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/CA62E2100296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c8d97b38bed6a95d121f99b8d50fae3377e7351d3227451125904ab963bfb7. 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/CA62E2100317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428d8d48069ebc4e2ccdfb5c0f1985b1b7c8a5165fd8572e4fe7db1949badba3. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/CA62E2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4772e397c837cd0019932d615836513ff4b9813aec9fbcd7cf60964858659664. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:08:21Z), 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/CA62E2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b66a416c04335f483ae176c9916d7a12fdb46fbf0fe9e3031499054fd3d64e3. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/CA62E2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd63ba104cdc52414ab97fa97e3db462dca90568eb428fedc2848d5359077182. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CA62E2200005.