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 0x84542c27692a6daf8d81019ebbafef2f02df3a5db8f0e78639c613dcdbad46f9. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/56a6c179-1ece-4d3d-9550-037eed295f55.json and https://artists.proofprofile.net/proofs/artist/56a6c179-1ece-4d3d-9550-037eed295f55.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xc3e61c6f76c044d9e51f525d3dab4dadf0052f57524eebc914dc004ea3f13d7f. 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/ES5631105446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62e832e624badfe987ccafead7872aa7699d1243e4d495ebc080c79d8713e0a. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/ES5631103826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7416b3a9fb899a6ad4eadef42e296d28fdb1d69b9e3cdb6a4ecfe19c0edf09fa. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QM6MZ1414550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7586d1bb4e017c427ff8da563495679275af3c551dc5f5e8b44f65df26457b. Chain 2 (Bitcoin): anchored in block 956960 (2026-07-06T23:19:16Z), 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/ES5631108298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521f5918d9ec09411c7ddab323686ed7020b28e2364d21b5bd9fe74503904e22. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES5631101323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ca716ccfe46829c1a280b344645fd7778b573c88ff3b629031c32bffb40c96. 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/QZQMB2101410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf72fee086f99801f4118d38fb8b281b65a92776b59775f86318866207e2cf13. 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/USCGJ2094736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15cb004ced764f8ba35d32ad11326aed9f7ae9b1af4bb6b1100ba9410272c3a. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USCGJ2094737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50737fbb96c4f3fa693456d05d48279f45e7154dfb01494040613883f2aac4b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USCGJ2094738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a77cbfdcbbbf088cf829c5057dc1e7eb524fb7fe7a2719f6b7e94bf3fb0fac0. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USCGJ2094739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8323acee179c527fe45974aa2bd44abcd6b4e194ae689a53056bff62d98b879d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USCGJ2094741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8631b4127f33389b98aedbecc5024660657f0d83d43b047096c3dfbd6a606cf0. 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/USCGJ2094742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41d445306803427e65a2a2f83df8d74d812834f20ccf4cba4ff1c7dfb573f27. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USCGJ2094743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa873337f1b63fdbb1da70c925b336ed2e95cfad933d000857b527f5d67a36d4e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGJ2094744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5994a43e940c9cc1de1eefa5c8a574fe17d2e32d9b71cd9cc715f78185f73ab3. 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/USCGJ2094748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b715136f1c5a282bfb1fd41c716d8f451468b40da6f69e791c9c2fff3205dd. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/NLRD52020942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4913b87fe73a31ffe2c1df6549d297bf1829352192fd5935780cda8ef4e32392. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZQMB2103458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589e4d68a91efb3f8fbe641bb523c1ec97b42dd37a22df8999d2e04b37cf2d74. 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/QZQMB2102407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9f9fdadffd2e1a9c49c3c56dc7a7be07e10fc85f3ad283fbfa9d841e0fce01. 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/QZQMB2101519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6daa92b9c17b4dabcc864ee49713a97463491c6b8c2ded121d8be7ad384822b5. 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/QZQMB2101256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bebe9866c9885a80e9390e4dea28adde97b132b06a99fe34f959164b847a18. 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/QZQMB2101133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c122f2763f1109f1108441734aa0e5f35c9e63344cb13c3c20bdf9e8fea7791. 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/QZQMB2100876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4e52264637038b68bc37849b4a200b0501cc2f6329ccd209054c6af095f55a. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/NLRD52020979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7594089f266f8624ffc092289514fb8d78f1780962a20c42aba4f83907d2186e. 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/USDXS2011660.