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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a529864c40a55b3a9c0ddf9240e6a53317485e78a5cf0d1bbb0f3834bc0b02f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c50456d2-b2ab-47ad-b00e-03e18a845f50.json and https://artists.proofprofile.net/proofs/artist/c50456d2-b2ab-47ad-b00e-03e18a845f50.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80ca1421def37ac50d21d54baa5bb293799baf603d248f0e6ab51948d4ebee4. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QM24S1912394.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cf87462cea06aa1df36019dcafbd0e046f99d449df2b9982f92e30e569e74d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM24S1912510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7564e9fa67b42ef105d0966ce6a43c2da41d75063d04db0ab722f4eb1c155b8. 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/QM24S1912511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde86fc73245e7a2f70754b3bffb1047752888fcd25fcfcec288d272e08c38015. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMEQ2118279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770a91cc40c877d09ed2bca36d414174a5ad51ac260827a452e284cc07b70d6b. 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/QZNWV2217071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4881e4ff666ca63d52deb3817dd321e1d01c5a481858609411d4838f145e2764. 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/QZNWV2217081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9a31d97eb2fba97f9683ada3fcb34f1d2ce41bb3cbb92ae7d96fcba8fe969b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QMCE31801901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d1a5dafbde43105c8ad836714034c524d0a23f89f74c80aa553e97fc96333e. 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/QMCE31801767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b299edc8132fc4be8174ea1a44ddfb4e0146c87b523cc64bd9cbe023a05bf5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMCE31801892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0385170605b45aaef0d7baccd6c73164d91660891f58475c1bf836c351e8a590. 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/QMCE31801906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892f9ddfd0c44881ecffd20a30e770e4b3822b68fcb6fb88a90e2459c1c60381. 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/QMCE31701587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb8e6f8fe2d1bf3b3fa59650d5cabd234755b5d5b0e58ec1e431860c87d75ee. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMCE31801911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0754f789c6bf03fbdcc521af9f044599644322015fc2aceea56022fcc5871022. 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/QMCE31801912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453ec40314f7eb055aa97595bd7cf99f1853137023121db4a3fa6dde881f489d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMCE31801914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde86fc73245e7a2f70754b3bffb1047752888fcd25fcfcec288d272e08c38015. 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/QZMEQ2118279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3612256ad6e5180c5313093f4c3fc5bb6db6b6f516e863f73e1f35350499abe7. 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/QZK6Q2197704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c3015c59fb4f3060b6bc40c57b9e657a497c1f2fea3a1990df9751a3ccf69a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFZ22003595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b80d0f066eb0408f757e527255fff1c1a8d783d73daeeaf62074e3a82c814b. 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/QMCE31802120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3e66721405831b90240e37cde360e01063205b07954f8036e335fb011a1148. 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/QMCE31802136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5257ea049e3571513b22da557e3d029ea3f5f72438de7241eb3d4267fcccf061. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USUYG1209372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be61c312e91805d7d397c06a2a6c537a740b94f7f0c16139033f4f9d1ba79ae. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMCE31801967.