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 0xc3998d518444381bf65d66edbcc91bf961bdc2bf4e1abea19a49f1fdafd4fd0b. 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/98c78d48-157b-4165-bdee-43dbf6fe6001.json and https://artists.proofprofile.net/proofs/artist/98c78d48-157b-4165-bdee-43dbf6fe6001.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 0xd5e2f9595b9bd20a842c8aa711f2360d1c895088aa14b9b7fae66074c3881bf1. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DEC831700237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc780bc7a8838ddeb070d31b52062ec141e307a259e6232789fedf8028baccb1d. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/DEC831700124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc857d76185add1b850022e640824e0c786f115f0366d352698ab86feb401ffc1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DEC831700134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c42949d24fc5bae00b791502ab3022679c491fb4f1b40d9a4af4cfd42450365. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEC832100253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ddafdfa3f182bf727621ae1a808627aad90c16ff0f277ac376c07db1656b86c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEC832100254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc7ed17a34a1b93e8784ddb0252bd655c9fc735b9d2ebe6289343e245aa86e8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEC832100255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bfe037c44e4ba70dfa348ea8db9621bb96197e9f197be22a2343a68ba98622. 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/DEC832100256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10476113ab6331bd8f94d4df6e9f691fe90e5d3f1369d0300db66029435dc351. 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/DEC832100257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b4e012c0591b7b9ceb2ac998b5934a449002c2c63f0676b850d5cd72ecfcbb. 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/DEC832100258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20734e21048518b0bdd9bab07a8734045e9ebfd9b74c0a8df206ae3e1cf2d325. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/DEC832100259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbda8a6a03e68aaea618d2835327832b2a73a0cf3030b0ae8cad6b5aac80185. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEC832100260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe436f6d9503b666f35fe20b13501a5d584b334c2d606b58023034c8da27c6bc5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEC832100261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e57c480c3c2ead7502ee47571367fac482ce4cd084de3adb9ddad653dad450. 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/DEC832100262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1c849090ccf2fb48e074e4c972f77a0363d64d4ac383a4394803ddcd6b7901. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DEC832100263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9bbde6a361280b099b17bc4755abaa36aaa0660f7015ecd39226b91ceeee21. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEC832100264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bab17919471142e3085bfe6b93261ab722f37f7d06bfbd3024869f4f55e157. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEC832100265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eedb9cac6bee21d809f93dadbd631e022189e6348d9452f0713f63fbbf394d6. 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/DEC832200153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d46993e7966f8c724cfff0e6758f5a94b31becbbdbe3e2129ffc0b32f697017. 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/DEC832400220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4e9e666594bee18f597995b75faa9aef8398a7bd899b52c802f8bc8789cee6. 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/NL4ND2000006.