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 0x409c454dbe5d14469bffa404fc98937146ac56fd59d2a4eb2be261d163e11e45. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51f955a4-bed2-4982-9a1e-85cb338756cc.json and https://artists.proofprofile.net/proofs/artist/51f955a4-bed2-4982-9a1e-85cb338756cc.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 0xdb81570bf32de8aa2ab09481da7de4ccc02f1575d1421044cc929f0346a5d592. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZES72579256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd278bb5e59990fc00df111208280d5dbdd8f820f75e627edb73774ab76bc698. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHN32515935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171732fcd7bdf465fb5f6b58bd7b80aa05ed1ff753c178aa58cb753c84642f95. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZK6J2511204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec37e927db29c40b5d6f61d200a0a7c552fadeb7928f4e8e5102e6b01085e50. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWR2509212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f43c8dccc788c7abfc75c27f50d7bab4a08d9561fde99d20062c1027141b402. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:19:34Z), 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/QZNWR2509213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62ce5ecd26bc5970a43884f2e18c8566042baf90f3e419f22b750dcad4c02da. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZWFK2527286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f82c1a3950030249e8bb71354a23286a5effe7fff28c3452b924dfc65cbbce7. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:02:55Z), 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/QZZ7P2537464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92cc2e683430af386865b3b0a8d9b54acea50e5d4b875823a432c90ca12a5b9. 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/QZZ7V2592882.