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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826d01807507b7e9b2daf6a6ced9ba62b9e44c871c486402639b7aeae8a88f1d. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/205edab6-8732-40c9-88ba-f3b8e04c6101.json and https://artists.proofprofile.net/proofs/artist/205edab6-8732-40c9-88ba-f3b8e04c6101.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463438dcafbb65dd376d9e747ad364da41baea1c119eefa2748577bbc03e4a48. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMEM2207126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e736c0cba7461e560990d99284c033b5c3766d44a91cd52727959c0dabfb101. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHNA2333682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04faaefc635f8f927acab5ba3b013ac596a59ea98f80bc3f386509f1de1904b. 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/QZK6G2337984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b60043b3d4597fa12fe1ea5c173d12ce542074745a5340fb98307dc399e706. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZWFP2338446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2be56cf9f696c294c0c82f131ee28f793ed5fef12584745484f3b0d8b81a58. 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/QZES52400532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9040c6b84461745f97ac2f340d341d857a5642dfb03d458b89e5522960587b7d. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZMEN2447411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345b7d5902f7a516ca154ddb197faadb9e8569dfabdcadcfad323cc2c9dc1536. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/QZTBF2425308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddfa41a7e06a006d3bb8003b651c2f2b1f42ad207bc6cce1ea4cb14cc274c98. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZVEM2524187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8284ed01ce3ff3bd9e654eedfa4e7ed3b94e74caed6cb5f2cd4ebf2987db86. 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/QT4K32547925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927b54a0e81cb37a19fd67e217d30d59c72478b0d95ce101db8135453f3217ce. 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/QT4K32547928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228be7ad7b9f9789213060a78991b30e2c8089ba71b3a99cb1dd89d53f2b8e97. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZTAU2289995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e1084c4c2980fb707b11cdead69c5ce59d9f3f0e09d2dac8447483f74a5378. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHN81937663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75283ad827f074e230ed75e97673b4bd6d968f1b99e909e55fe392b868500c9b. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZHN81937664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea5465c97d7d09971e740608a823f70d1fdd08aa18db284f896ceecc9a3355d. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZHN81937665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbb31ee55bcc0757af03c96aec621ebaff3fb96d704016c3569c77421231433. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/QZHN92366306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641f69ed9759d0c46c63b07f37c3ced1774c2565bf1837b524812a973d775d25. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKXN22112346.