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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 0xa67df564c8041c8ee970a722c50581798579a8bd46b6c046b6fa69cc0d96ead3. 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/8b41afed-bd0f-457f-8240-57463b00ff86.json and https://artists.proofprofile.net/proofs/artist/8b41afed-bd0f-457f-8240-57463b00ff86.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 0x856c9c1049c34c635a68045af074ab67dde9ed4f797183509329f89b401d1ce1. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZTBC2395219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845f84c8851d12d44543b41976d09915ee3df27f3c6ff3b11efd2d5b3fd9b898. 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/QZWFH2448998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35fea900ba1292853842b475220ea384ecace16d568777cb47ece1b06b55e4c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZES52552887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2783c3d6c14edd0908ef28955fc352b16f18fa7642f4da2e716af4fc2645a9ad. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZES52552888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8174d41ab7258c5b0bb823e8e5a1e7e84c62a29fa6a5767dd00a895b2c363682. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZES52552889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbc0be027dbae10714d57331b17966f8af1195810af3b4dc5d7117272d9a596. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZES52552890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8dff4cc90b1efaf8d79a7d60adc9d5184da71bd0c4fd8b60f92fafcef45e65. 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/QZES52552891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3e93dbfe9b244468ee199edfe17e03784e53cfe8dab6a0d2e0cf125bb4343a. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZES52552893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd183bdb6a080dfd0efa3ecbd007ba17920acbc0ac7bc2daad3e547bdd7cbd0e0. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZES52552894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d335f534e371b4f7c5d34b5ffaec966a287d7d6388043e7ac264481da24b17. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFL2585394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0df40332200738fd52f771b407c776fed63a359ebd4d95f5e5f946ce1039f8. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFU2563190.
Friday Night Cypher (feat. Tee Grizzley, Kash Doll, Cash Kidd, Payroll, 42 Dugg, Boldy James, Drego, Sada Baby, Royce Da 5'9", and Eminem)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1af3a2e0deabbbe21932078af439e05fbd718af26b124d1d5312caaa679170. 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/USUM72016354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262b1f9af6ab174c3ffafc358321bad05a17ac99627fae619ccd12ee9fb824fc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NL8RL2434578.