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 0xc7ddff015cb7cf84042249a29ff2dccfbe21d956c2df50854a634e0ff2727966. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3487ddf3-ce03-4a89-ae03-5bf49aeeaf17.json and https://artists.proofprofile.net/proofs/artist/3487ddf3-ce03-4a89-ae03-5bf49aeeaf17.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 0x67b82e8f95d59daa4d4a4e61bf8c5a93b9e0e6fc6ab92b44e25c73b7f729f6ee. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZNWX2480502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4977642974bbca5230535d4c3d38f95dfcf02873f50ddbd74e3d9944c78155. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWX2478782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe536c8050b36071fc284f20488e1b2a7fdeba20a2b18bf1a480bb82e30593b5e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWT2577353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa954926fa31d38cc8544d18504a0b983344f4be9b13f0b860821adb6dae9ff38. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNWT2577354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2855b996aa1ad6012aa28032915273991df0174eb0fe31e996ada8eda7983aaa. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWT2577355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eaf6d61ed205c3434b04d7dc9acaef058432ef6678235ee1f21f853ab8fba3d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZNWT2577357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa529b8140cb7054d85a94feed5da3e7cd4f9acd505b231b7fa9fa51a641dce6c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWT2577358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49026df653559847e7219159eb47c25e40fa24c2e1ec95113afe472bae0c75d2. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZNWT2577359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb22ae340ce2bc55f252a93b8f600410b389b30fbea53a894c40c98a1ba9f2e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWT2577362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79a71c2429a9d09f967689cee0f26dbd4427f74858c6ad7386318c863ce99e6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:58:44Z), 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/QZNWV2586496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198d530ca3df8795346359cad2c6b25ab42c6860b7960a94cf61b7b974366463. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNWV2586498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d0377922cb0896565c0a7ac419109bb067843bdd0bb962a6ab102d728c1c68. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWV2586500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c2e342fda17966d7b0c38e7250755c13705360f1d1d7da7b55f31da52dd565. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZNWV2586502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28b683faf3f326eecb39da7f362edf0a9a812d831817ee84c16d94f31ed7a83. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWW2500196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a852e486fe138f489f3d81eb5dd600eab1d63d8a83834f9854142eb4ee320b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZNWW2500197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58beb2ce133948cf50f759659189a04b6ab591adfade410c687dea6afa40ac7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWW2500198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b275412cbfc7e923724bbbcdeda2be2ea6d1e127ea1e67dd11ef9bb321bd38. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWW2500201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a173e4c0dedbb83c81117915ba6609a17552f4b07d3f9bfbb0754a724ce04e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:36:21Z), 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/QZNWW2500202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140f06f032226e6a59b202dc67f5fcdbdda682420d8278d56910d647f8d55d5e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWW2588247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2314e6a034702fbddffd83543b00aecc072be91c833ac963801a96a21679c5e6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:38:54Z), 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/QZNWW2588249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa537cbe5ec746bb9b5f233ea88a5659b5b4a4fbf66eb8bca265de66ffc01537d. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZNWW2588252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3b19d80515abb79752a49ef08f2fcc7d480a921a86ebc7219647b004108fad. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:41:56Z), 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/QZPLS2590387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0330dc9fd5896282262bb4a6829a0f3af3571f1e95c473497bb11fdabb162f78. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZPLS2590388.