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 0xfe3188c1878777e0274b4797cc5269e763e5645df7ef6387fca084fa98a57470. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/023a5a11-1c17-4b98-9918-cda204c70a03.json and https://artists.proofprofile.net/proofs/artist/023a5a11-1c17-4b98-9918-cda204c70a03.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 0xc608ae00fd436282e7fa52c22e35b00a836960d80e3df2106a7c5f31c4b6b5f9. 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/QZES51873425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f623742eed5835986abc2895ce856d656c2732b31e3c430c83edfb7ad5efcf4. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T15:35:59Z), 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/QZHN32585320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2129b6e3430715b8cfc8b4c51d2eff8582562e67da8b9f13ba18a6566ad87ed8. 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/QZHN32585321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e84d657855af7b0c920a011171e04df3b67e6d57d2cb36d048eaa72a48694b0. 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/QZHN32585322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f1394c02411e994ce737fae3ab020c0069485d743c8cb5f39158c6aa1af0d1. 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/QZHN32585326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde18e21b9380ba43b6230e8c113182aed126ca15f6f391181233047b76b6489. 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/QZFYX2093572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc217f95d8269d3816305595b6927e1329b995249a79dde1c40fc6ef040f26400. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFZ62067534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa120a7fbeb95ac167d77eb2d0beef75824dd59fa701e1901363dc952ceeb805a. 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/QZFZ62067535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5ec59d16afb31f6d65b2138fcc91051b16c5e0181e411b295ba87b1c9460f5. 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/QZFZ62067536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ddaf97888de51b61f0454b7506bb5fac02352d6cb15cde2866170876924101. 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/QZFZ62067537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb33cbf736226b5b3cf1bf1a659e43065f8b49894ab5cf00eba5f509c438c887. 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/QZHN81980158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c159f52c08a4f2ce5239e77c32d6fde6beb644eda2a443f42eea59df894ddb. 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/QZFZ62067538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a16273a9ef590c82461f3a3c2fade6ff4d9d5d56e0664f4ff4f2cfd57a8b82. 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/QZFZ62067539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd21aeefd436b15a7e8d039b266f9cd4b028452aad11ae644164b78e460b301. 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/QZFZ62067540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf180dea7caa1b615043c6b29edbd12b0d370fc339f249b9e134169218ad0d2ed. 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/QZFYX2093582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc57075e4b0abebd2735f10ae03c54fcde9d6c8f0373a28d294dd71699d826b. 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/QZFZ62067541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa737db9bfc0b5fc8cb90419a088d346e518d6b396d4cca9291b1ead1a4fdef. 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/QZFZ62067542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6702bc5e0339dafdbb2f75c8569321abea4621191db5d71c135bef3876ad296a. 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/QZFYX2094028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f5c57648494fcc1777ff14fe4177663df3a7c64a729d4ab133200c5111a946. 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/USUYG1267054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d5edc8f4dbecef4273b2b112754018b31fbb9cba73f4ae1401d5ef47d84050. 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/USUYG1267055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fbaa054e443a86b600627b49c9ad41347d32e3c2907a4c7dcbcc0aa681fb1a. 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/USUYG1267056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21ae51821d399d12fa17a048fb368f15af1dc315a4ca15ea7702ff625dd7174. 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/USUYG1267057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468918c779fa2ba2592fca7ac8afe3adc2da952bc15c36e930565402b126b31e. 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/USUYG1267058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a276485beb2ebea409356cc038c4facaf412cb3dca65e3b3ddf422637601d74. 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/USUYG1267060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf384ad1d285b42d2f198dce12e0d10d1ec407f7c207ea2bfc9560cc80be591cb. 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/USUYG1267061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70bda8ec9b37b62f7f209fde5d72e7a50ea1319e9d5d677e5a9e69432740603. 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/USUYG1267062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fad3f05175f2c9b96dfb6c7cec6ea29252dd865188eaf81aeb0c0a1447e8752. 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/USUYG1267063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3030db3c0b1e6c03e1eb3dd70665e77725c1b0e96b9f128f69985c43ac1f77. 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/USUYG1267064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3f8fc7d43e431920bd21ad1dee6550595e8766f7d0d9adbf1a8001c3897015. 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/USUYG1267066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812ca6d069063cbb2f4457bdc9bb7767de8778ff26b13cf3cd9772739b9da5cd. 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/USUYG1267067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfc8b3276e23a724de5d48d91b9bd3f87e1d1fdb17d61e21028dadafd9892a3. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USUYG1267069.