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 0x79726aa1e934bfb64cd25f94175feaa986de1cc770c647bd2913b66e9d7ceea9. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c68fdd9-e6b4-468a-90c6-6348c723a1b3.json and https://artists.proofprofile.net/proofs/artist/1c68fdd9-e6b4-468a-90c6-6348c723a1b3.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 0xe6a1b963658a5b5f74db87416259532b5b4da1d645b7dfc15457b64647231918. 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/QZTRX2308134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19e033f904937173f59aa8214eec08673471e6a1920958588e19f3a22cc5e98. 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/QZTRX2308143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629f6c24d724c2eb80342c210b9af2ad4a77c3b02fb2d79505fac89530c48140. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZTBB2397382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca67a0bcab682eab389afd8eb22e16ab7d276b3e50bbf87a3266c5d567b298a. 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/QZTBB2397383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd141ecfc1e202464b331c9a6829c73f4cfd91c79a31a130e9a22d587695f05b. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZTBB2397385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae734a68430aceff5e453ae89a5aaa4a85e9e542f0d60f4e88c34c90e5d7894. 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/QZTBB2397387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c05abf21d726fe91a02c22abeae2b5d45b7a596d82773ac086e6d67c51b478. 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/QZTBB2397389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b525b316ffc2eccddd4877a62d9293e28b950b629654b6c6738a3f7119f565. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZTBB2397391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b01637d5cb6e8c27fb6602b8805fbcfb650821caf679edd8d5b1bec3d6bb1e2. 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/QZTBB2397392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad59e2efd423214b5477e82d46c425800a4db146da21bac922987ca26ae3fb3. 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/QZTBB2397393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1ea1d52347567e36dee17ed2b78cfcc7dc679f46e4b976240e8e234c7752aa. 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/QZTBB2397394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5273d002c6fe48721014bd53453569ce39fd650d85432d8fcd6d7c891b8bcee4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6P2527445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea575ea9c3cf59375a9c62a11bbe7257c97b63280bfca244a353f6352e4fb47e. 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/QZK6P2527446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03016f2e90726c4fb7037a64fdfc257f3129a03195f275d152d3d38205e79e8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6P2527447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30fc3182f8f867ab2d4afbc41471d39b3526b4deaeb8e939b3b05927ccc4aa7. 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/QZK6P2527450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0d390b026170264125044269cc657f5b257503caa0fb0eadcb1f6bd93f2abc. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZK6P2527451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90df2c9aec98414e7ba1716371629c894d053d42f32a8b63d0673d639bbda4e9. 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/QZK6P2527453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2680a9452db6dd5cbc16dc5805b1871976e407c1ee55aea0233f0e07f945ab33. 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/QZK6P2527455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261b11e08e5462d9b3a86ec67a6550e6e5771db6b079f4892458372eb507aad0. 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/QZK6P2527459.