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 0x27275447b78bf43551d989d9f7f060459477567ea242bbd378076602f4290ca5. 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/1323431f-04e6-41f1-bec3-0c74b98b9f05.json and https://artists.proofprofile.net/proofs/artist/1323431f-04e6-41f1-bec3-0c74b98b9f05.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 0xf3efd74bb54a726592cd3e70119b4969d5922d1c05fe7819035134057c388c80. 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/USCGJ2513721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36985a2faabdf95b60138b2a1ec667bd9d08cea1665591efe7bac5de0fad8f74. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USCGJ2513725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5889dd12f535b7d412003296016db8c86bf12df936f63d263ce8aec8edabd6fc. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USCGJ2513726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4ce80f4642bf8bd45d653cb1090e45d1eb545551e1c83e3180ca70d24cbc50. 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/USCGJ2513732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850a99fd343b7fc8c81eb2db8bf122a0d1ed8083ad0256054e72e16001c44c9d. 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/QZNWW2348401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814a9dffc8984cf1367ab171b8d9fdcdc77fb84f2ab4b2eb06a491b4a695ec93. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNWW2348402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ddebd0c4dd97d50a2dda617a9093b3b28ec4f6bdc61bc6f638490b051a88ec. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:19:59Z), 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/QZNWW2348404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d4ce8e2c5b6114f9aebc8e260969094899727b020920d1694fb82ac651fbfc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWW2348407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aeb12e4b6792d7bc25cc41a246579bd0973dc90ee512616a4cf982e93501830. 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/QZNWW2348408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c5c3cb1deaed1b33ee4a6d2ed564a445c50cb593cc6123faccce265157fc37. 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/USCGJ2489219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3829231aa15d86649e2f1a2c9df152da76f4408690cca22df07db76339bf0fe. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGJ2489233.