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 0xc98858dbe04aa7930dca74f035b78647b36e605b1989a2d8182acce45e219fd7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f22637e-adca-4be0-abc2-1fd4da1b6aa5.json and https://artists.proofprofile.net/proofs/artist/3f22637e-adca-4be0-abc2-1fd4da1b6aa5.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 0xf7964605aa0662dacc0cfc99883dcbb1267a15cf0db8fc67e7b24e334879b352. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES92382348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76cd792bee4a5a0c517117c2f6a771211ea6561bbb7e1818dd548c97c7a0e82. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:10:09Z), 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/QM6N22473646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f7f8561d99fd34e9ad17fb167fc1becb391022c418be52423256577bb4966a. 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/QM6MZ2492938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee76e2f46b5146cf7f28d11968d80d69a3bee97219c02faa4b117496add8a5c. 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/QM6P42472835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1363249ecdff23db90ab856dd04d726f6e7779483957ffdb1cb69a30f69d990e. 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/QM6MZ2437465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abb9df00f264e045a4ec962b13dd283816dc80af3483d7a25b8fd8c9e40144d. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/CZUM72501085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3532fff34fb020547aa176d2777785d9c79fd7d8b6c14721840aa9fb339b3b. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:30:37Z), 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/CZUM72501086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d056811c8d86946e9581fad5e35b8b7d587f5892b80470a7dd6af84f645a472. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:04:07Z), 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/CZUM72500566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7583237fbcbc09ea7f353927df50f6090b5ac940ae66550e08cbcb127d7e05. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CZUM72501057.