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 0xe501e106b7f13f35a248892b6201e1102676a769453b29af9405c3abecceccfe. 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/c92e3baa-5d75-4e7e-b382-ec21c5e0612d.json and https://artists.proofprofile.net/proofs/artist/c92e3baa-5d75-4e7e-b382-ec21c5e0612d.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 0xf79eb549a4a86972ee7385d94866c6a21baaf35b0903d821e5c5cb3e0070a7ad. 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/TLVEM2472161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc71e98bba774de67abda330f3f55fe26a6dacc9b21551b9c857a60bb6c156d. 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/TLVEM2472163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6609b0d4e6c3407d16ca50229e9b67b41130bd575762a0b5189f53df9c2af8d. 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/TLVEM2436256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46eb35315bcf3decd2b3716bed2e67e3ee5f2e8d71575c8907bfa03030cd18de. 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/TLVEM2472165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752f5e3394b89e32ade8e06749b4e46409cee5bfa570e9235da716650f1847d9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TLVEM2472167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8639f4ce90876cde03b6b3270f44b69da5ac45787d604d9be017fbc2cf65c157. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TLVEM2472168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ab56b23a246aea19fa202c0e43179d9866af54e014805900ffb8d4798ddadb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM24S2500212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6609b0d4e6c3407d16ca50229e9b67b41130bd575762a0b5189f53df9c2af8d. 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/TLVEM2436256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7e81c3800bada85292215ad12d58da3fd7e6b0fac576134cd4dd9d6a61b48b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM24S2303520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfb1edff2eefb7512fe45272889928237025872555be942e7d0366d501d4f5f. 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/QZS7J2304614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd051e95cc5c983a59ab332859191968c9fef5e5da042f9576526d024262de49a. 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/QZS7J2368566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d2eaab0dd641c1820427f8fbee182e79e8df6af538f5b79308e0b069807405. 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/QZS7J2314836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87eb6ae0c183ec29258145027e6735f0e551a72180aea3ca2d2f9066f5c1fec4. 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/QZS7J2311274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e6024b474710bcd9f27dd3a1b5670087a1bacba27db036c0655ca1e5cf90a6. 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/QM24S2205816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204b751d9f3b691abcbccda57e391a6ae8862ddf69c1e7b06aea4c5f29975bf5. 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/US3DF2189073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd3e678b9130a57fc77b2489fae2d55c9d8be5b1dc9aef41bfab881d37b7466. 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/QM24S2010175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62214b9a5354a5bdaba11627661e49779d3ce78eaeae776758ca68c11aba737. 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/QZ93L2037868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8dcb7602d6616a9853b586b1b05be049c5f5fced1e085395342f5937c87638. 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/QM24S2003970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585765b6f95bc7db7ff6a8b542b935d6d89dfd4eb80ab0f971e76497bb5fe0fc. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QM24S1926999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773969a46cd273e33de949705afcf5d4283a5ebc30135411901b0c59f4cef9de. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QM24S1909910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fdc9f45a0b83159bf3fd03b126c82c37d76a7aeade1ae046cf85c3b78dd525. 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/QM24S1833232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5576afdc35399231b8700bed635dbddf9832a381b3d1cb71061dfdea1c024c05. 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/QMDA61874601.