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 0xedf376492d3b6196dfb6ae19d76d1b23fd79f0db68a137db5f3090f0b8f58fa9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aaefbcd1-8544-4b1a-8672-2e0ca4386164.json and https://artists.proofprofile.net/proofs/artist/aaefbcd1-8544-4b1a-8672-2e0ca4386164.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 0x6ca40e7a6ac47d0ab9e6e1abf440f3a08cdec6d76368f5a082f6b9d3bd07e1eb. 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/QM6MZ2290117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb66e3cf056ab3c56d98d6250a3c36a2f5217c2894c012cc8a1042471cc99d8. 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/DEA622302178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99deedb6aa6c78c1f60cffcfd29fbf3ad9708e84ffff15d627b39df53807e844. 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/DEA622302179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1a3da5e024664ab6b724152394e6a789ca7fffb2bd7eafa6e256cce1fa6457. 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/DEA622300197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa631e7a1ca4648011ce5d5d217153226459d5f0ba7a8736b3d93f6c91c1428a7. 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/DEA622300198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d02fbd8dd18b49564168ea15f8e8925b8b9dc9c2d0319bf40c6d1334233f44. 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/QMFME2188196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff26ff2adc81bda0373a641793683dccea56339aeeb7c2a2406a598b2a30af7. 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/QM6P42476911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4d4d186434a176316e34b22a55dfa4edd90c4c057e762541bbc59b96c9213d. 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/QMBZ91975851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe4fdf8a43b62fd88fcf4d43dfe672102ba2820954ef6571962bb75c60cae30. 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/QM4TW2114843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7d0c6270e0ddd7a1e98a8096c4c2e7f1de844d357efadc1c64cbb932275ba6. 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/QZKDT2400466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3398ad4c15594a2ff343a6146171de414e09f5b9aecd50244d7bacfa0b20ce5. 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/QM7281724504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de4261a4763b64593c5fd7fd90f72f73523505d3d63285bf2061a8d64a5f89b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM7281724511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa926db291778725f447e6447be19273592355e30b7c1d434f49e8832bb120b5f. 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/QM7281724521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ccb1d82d43e38df4a52e03aa7da95e575f80ac72c437f8a64c3ae91a201d59. 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/QM7281724522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eecab84f3452e5c5e64428c1af329f19d3a5115ad61786aed861fa2c68f2266. 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/QZMZ92445426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362582887c94561ce9f0d82fe18d768acce28942e0ef717f871544f512846d4a. 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/QZMZ92446360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc233a83ea620ae0310b8a932c95e2ffb95ce02c2b791e416b4a4876572f737fc. 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/QMFME2132324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48299dcc0dc80bcafc5cf715bd0c0bf13c18116d81fa529fc4d9e68f9056ac8. 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/QM6MZ2029373.