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 0x0534cb09699f8f7ab423a7132d8b2eaab66cb68916de2296df16614511998aa3. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a27948a3-5a07-4c63-b974-42bd76d7cb26.json and https://artists.proofprofile.net/proofs/artist/a27948a3-5a07-4c63-b974-42bd76d7cb26.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 0xf80ac7c0bd46fc0c4b37856a9f2ae6da149c1dc2b70c7eb8639bf062701f1b3f. 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/QM6N21834398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55f266556f79b32e4e8bada9f3508580dd41e96c8d096632e74bb88afc27565. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QM6N21834399.
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 0xfa6835143e62656e28b7ebb53992048a449dcf306f6353bedc5008b636303bd2. 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/DEAS91500071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb403c2e1051d19ea2d357296280201fc2a019010ce499ad53feff71d7ee72075. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEAS91500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8144261398656c5b05d763bc6462af76381f6acaf3b40d83559352fc80af53a8. 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/DEAS91300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e191f818fc44794fb666d8edd3007ef38dd614de8e1a4e63c16b264ad6c483e. 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/DEAS91300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c31b30bfb2a9ca15d9a81388fdfefe6952bc7e0b5121bf391d00d3c640e9a9c. 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/DEAS91300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72eb5aa53e2724b501af4832417235aaefb68b1699ddd50a9ca4b5ccb4260f8d. 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/DEAS91300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd38a25c300d502bbc25b74f17040ed1478ccaeb8b098b554787e025cd850f4. 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/DEAS91300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84483794a3af11f51de5c91ae14526b179006de9a354833bd3389bb00b8eb73b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEAS91300087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59cf0054803f108fad639b73e250d7ced55f105e0b581dc82e81bda5f4b3bba. 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/DEAS91000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411b5f30db8cb981ff26b61ed31b413746b59cccce3383f267d4d2fad008eee6. 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/DEAS91000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfee938f80f041a0ca3e5de0c4338474a368284980e4f091a02585eb304407d4. 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/DEAS91000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20d9eb113758fccaac7e719b363ac6bed920890eed0464bae33b3ba12b090d0. 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/DEAS91000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1527a19c82c05c2bb0484a9f0ba9ccf9d5c2e90e11f53a27ba5394ab1e4fba9. 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/DEAS91000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a87abaa00c03296cc359570ef24f790ec94e8f3f0841cf89b685aa8d2f91acd. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DEAS91000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef28c27b441166943d44730ffc0157041af2ce5cbefee3b624e9fb91c952b6d5. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DEAS91000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0a4a6b9964661d9f0292aa8342a54eefba1087ad3bc71ee5998e03cd26a867. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DEAS91000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10987a64a799dcc9385e92476d7981bcd9771d3837c103c699c677b1762b3e20. 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/DEAS90600133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a041e713f6f5e388533b09e9d7c4d0f159db07fb4d219c398e0389c20fc693b. 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/DEAS90600135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffe2ca5baba66890eb2a5776a22a3097c4cc1dc85ef5ee5ae92d325783caeca. 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/DEAS90600136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4d14c0b403f48f26c720741970d959e0114d0a6c37c71eb8ce5f9fe87aafde. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEAS90600131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc7366b091a72a0abf835220ebb9e7a79d650ae486945f5bc65f59cbe06b215. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEAS90600132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7f3bb776ec0a16607559241055233f51db98c8417bd395bfcea5766428457b. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DEAS90600137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573607750a96127876e916f870278cdca1bd8f85cebdfccc79f6a78d57b8bb10. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DEAS90600138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e220740f715b9dec5be68027dfdb817da5afee1b08b2b4ca9b418f48d623ebd. 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/DEQ510500275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08d7bc376399d05f8cc93fb64bb38dcaff8b7d4df43c3b7a32a4de47750cb1e. 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/DEQ510500276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a1f78b61c49c6d1c810fb2b1da2ed1977691bd54de1c33408b9ef074588759. 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/DEQ510500277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac713c6519543699ed53f0efd90176643c0ba93755e9530a919e06548575abcd. 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/DEQ510500278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c9d5d1f5b1f2f8bd4c1fb6b0239fb550451387a1baf6b997a7c194393378c6. 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/DEQ510500280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebd9c0cbfa9f4f18d77f52c55d7c96d802042246236bbbbea2c1eec1acc64db. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/DEQ510500274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc190de228779e62d461ff2d94b5a37f960c5177ff3b2390d3ab0f858d4dc83. 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/DEQ510500279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45311406f29f4869e8b7cc53a2cfed7487a2a4dbc6ce864193869dc4b2af2956. 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/DEAS91200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5363ba67d2f92b15c25614faa3bdc2e5285c29e943a394774d56f90463b2cea. 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/DEAS91100070.