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 0x8360f8064c71ff58a18fbe24b6aaddc636ffc1bee6cfac7f7290570592ee928d. 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/d713adb6-be59-4223-aa83-a8030c90c336.json and https://artists.proofprofile.net/proofs/artist/d713adb6-be59-4223-aa83-a8030c90c336.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 0xa88df39040fdea21f7de47af68dfc9822c9ec5a455ac2bd3bdb2c8484ca3f6fe. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/QZK6N2485137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580554514e4eed88d67243f1530bb0fd6c98fbef859abb43ae78eb66cdb25e40. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZPLS2434296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960369ddc8d577d8e8f877bf5e1348f7ee65460619f138b3505de28f1d134d5a. 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/QZTAX2497491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22d34db178a0cf57c1afccd8df87843633e620251f477b9fe0e843c6df64c24. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB52491427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8746942c0544e77950b831e3458191afe7e54600a7bc1dd79e928fa6086e1511. 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/QZWFX2474028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b39158712d52599d273f654ca00572d7f66e7b8c3b42eeb39c7b6f6333861f8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN32575051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aec9a79448694756a8b68ca58893addf724a1cd2627a597c0be688dc04aefbd. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZK6M2574504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae559872c8d5c9398198aa07326bea88304cb4bb73d855d0dbdb848c7cfef83. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTB22559354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1634d67536cb605b97546941c72122350e0bff8ec37811b3a42dce3e1a9fd5ed. 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/QZTBC2537213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc956e175cb79261ae78087d1c63c6272d39447a05b044e36a68a8b418c32ff64. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:42:53Z), 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/QT3F62578772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8bac658ee5850620bb7d57bf43b6df8bdc30144f34876aa076d14fedff74ef. 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/QT3FA2504598.