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 0x54c3ed87bb9d5d3cae3a42f9fff268138d59b69a063509af566b1231a5595b76. 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/b22c97a9-4373-409f-8ca8-7016f971c798.json and https://artists.proofprofile.net/proofs/artist/b22c97a9-4373-409f-8ca8-7016f971c798.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 0x3670cbb69391c529d44b3d0dbe72b1e83e73ae744f05c66183e78ec7c86d2d95. 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/SE5752332796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3040520ff3d3f4a5bbaf1f8b3edcd99c54abf2e57ad59619a5be24291b87319. 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/SEBGA2100611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a0b05f162b60bac9cd6f517cd49ac3bb426778e6ca668558730595386a1148. 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/SE6QE2255500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2ce2dcad5e614b94db1f99edb0d815817c877ae15ea909ade54a6b4f2a7bc3. 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/SE6QE2255501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc53868a494cecff9f09c9c6520114364485d44a90374034af71b351d2bf7cf1. 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/SE6QE2255502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe12a822fbec7446c6b5112b50c01865c832cad5f11d88fcb3aaa1aa79a460b5. 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/SE6HN2247618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd0f0a3a9c5faff8e78045eab624b5a70c1d4ddbd1a4fc99a847927af1c2438. 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/SE6QE2255503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9739e51271fe385bb53887c79679fab66be1b6ec5019242d79e6c29a19cc980c. 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/SE6QE2255504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865bdbce32e59e8ce66ec0ef1154ed2dde3b9e3c9ec9d0c991f4794687e27978. 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/SE6QE2255505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc7c86ac0a6748e295808b6d96e7ade000e8d48889a5dd1a5769425a6f5718e. 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/SE6QE2255506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb983319033549663cf94cb6d37f2510fde1188451114755929174b3bf193ca. 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/SE6QE2255507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75a00948832dc656d72d1a3232c13e60c92a35eabcc1850dc599ce6de512c3c. 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/SE6QE2255508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4329452e520ef7f10d09e36f39eb94c804816496eadb1688a4a616dd1e9a8fc. 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/SE6I32035020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dde99b49211db52dd101b750e4ac6d6dea4a725cff4b77b0808dac7a58a4ef6. 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/SE6I31969516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02bf7f7e7ea2d0fe76261252d94cf37f1ae0671c574f160bf18f52473c75bdc. 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/SE6I32035021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0f3b363548e4138d948808d2750096f36c6c1058f9032591d8862e793308ba. 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/SE5752027884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa81f3baf51f411a91ea4674e9c3d2cd0444e28d2295ea6ea520f0e796364ad1. 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/SE5752099878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30043c5460b4ff715218e0b446a429e97948377eb6fe5893c26f810b12e5ed1. 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/SE6I32035022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0af576645d0cf8b6d62187cc5090781c71ae4c0b19a2701660b615013ab8ae3. 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/SE6I32035023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3244f2e9066fbf3654d1346d356c937108a3e06a1969d1719acc31295edc4148. 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/SE62M2214465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1195061753130b5174a66af59f3375ea6b790525f104a6fbf9d9928d736b274a. 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/SE6XX2226028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f99f8ff80501e8fe78cfd77e81b16ad2201aada223948572077ea3673f35d13. 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/SE6TI2148992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f2becc2a4486ddcf5f7ac47d1b5ab03e50286655e9bda1d250d12b15294faa. 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/SE6SA2119354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb40dfce4e8302b3286376f534726b1c931ddfaed89dc8f1bdc5dd2e354d1100. 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/SE6HN2134642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef465f7f26df088f7f30c959ad3d02e2a111d3a5114332a6d2d164c5f5c2d85e. 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/SE6HN2134643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037faef849fc2bf35184d187ac6b8fd1b436a16383a929f28ba35a5d95561ca0. 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/SE6SA2028372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea031e1025bd72318693f6454663047e3a0cc5f9e174da40e6f42789cf84187. 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/SE6QE2099856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe726ee65f13a11af9943d5482cb13065bf37e5cd8912dc82967a83befe744947. 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/SE6QE2051338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85f1adc22d7cdd2bd76789e9ae60b2eab56e7e8f5028a525e5c2cae20859bc7. 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/SE5BU2084542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818f986a91fec9d15c9bc7ce9163941255da01f7f3d99edc148f826e7de19b55. 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/SE6HN2010739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa81f3baf51f411a91ea4674e9c3d2cd0444e28d2295ea6ea520f0e796364ad1. 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/SE5752099878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe195ac90b4296402a36bbd2169063633c066dc149728c6339c77bc4c3da15354. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/SE5752099879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0f3b363548e4138d948808d2750096f36c6c1058f9032591d8862e793308ba. 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/SE5752027884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd80c96ae5c4c2c4ae4ef42d7cbad1322d967279909f50b34eb1a874a88632ab. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SE5752027885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93761766e29b8b738e4a8353a691920fc30aa02ffd74314180c347caa346ec72. 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/SE5BU2000404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe194ba85e78fb52ecc1cbc75ebe62c7e94d60a3954971728fd0cc19f598c25e1. 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/SE6HN1997466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dde99b49211db52dd101b750e4ac6d6dea4a725cff4b77b0808dac7a58a4ef6. 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/SE6I31969516.