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 0x82102624b7f7575a0ca03b42ae696c0072ff084d96b18d5de493a3df23a761c8. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fed57b27-4358-4b66-97ea-46a23dd8ca4c.json and https://artists.proofprofile.net/proofs/artist/fed57b27-4358-4b66-97ea-46a23dd8ca4c.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 0x83dd24105915088ab66dc81278769508fbe2cc06ebf227905cf057dbf30fd933. 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/USHM81908932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3e001ab53ee1236d5c7c78b87c1e8c7ae9a22c7a42c332dc1b1f4a38cbb156. 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/USHM81908935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc6ac5129fa45960c7e44501d5aeea9418f9a59b884bd4f216d57cdd9c4a08f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM81908937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df97ef2b1d816a3af3d41ab685e39f01f6047eb8eb6061b056edc5d6a7ee4d5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USHM81908938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9a9ed5ae9872f09b70fd14343bfaac2e327663867833e8277d92102388f484. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:56:58Z), 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/USHM81908939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3bcac9c048c08124d2030f37c74c9e2b1d93f4ec1ac550e911925104d6588d. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/USCGJ2003967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c33ec82f9dd42dcf64689b7a5173f0045bb95aa86a0ed268e313424dc4344c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:33:48Z), 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/USCGJ2003968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe511a309d6fa48abd0ad0e15e770d74773718bd7a1f942490f4a0ed6963be8bc. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USCGJ2003972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd345e0b85bbfbabae367a4e5ee30333001338d6997332a3a21fa4c5fa080cb67. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/USCGJ2003973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6897862287ca33802b2fcbd758283ea63c48d5d4782b7be0e85e3441b750da94. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USHM91834272.