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 0x98f07297a42ae2929340ecf0e0754984d42d73d104bea106cf52ad0341c79d15. 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/0ba3effd-d549-4de5-b105-a1727d8542a0.json and https://artists.proofprofile.net/proofs/artist/0ba3effd-d549-4de5-b105-a1727d8542a0.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 0x4424643038e288b02e6f6beaadb34e429f08f1ae33106142ecf3236fe7639e5a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM22289015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e8065916c89c278018093049577ecf1d23848d70177c3fe27b6aca7d5e364a. 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/USCGJ2393171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74234bdef3552bbb67626be3e3e63d195d2701603dfa348c5ed32bb87bf0eab4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM82223263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3621fb3d9dd82035c43f6aade6e666de7f3a7c71ef5d399ceada75cdbc5e37b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGH2362659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22935253f4dde773bb49ec24c1aff69db95f5a7d9a29b63e2775ad62d1458d81. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/USCGJ2443019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d5bc450475718c23fbc82c3ef3fd833e74cab0d6504a377628a08704720b1e. 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/USCGJ2443020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bb6247a06f48063705b90c983c830ef5655939ad7a7993060502a5d3a8eb51. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:07:53Z), 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/USCGJ2443021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c9e376c30548bdcb639aaba5ebc25838ce98f070bca86c6c88a78a3a8c9266. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/USCGJ2443023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1d75afde7bcf4112ae32da88eeaa741f08be79e2204a7e0bd0a4906127a3d8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USDY42502033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1987aa11d622058bd610f9062be08ea4e5dfb07f30a38cf67abbdcd6c088fe09. 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/USDY42502035.