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 0x858358aaead8e685801ea0c0467bb7665c8f32855400ba6b5c48c9c997c6f577. Chain 2 (Bitcoin): anchored in block 954174 (2026-06-18T03:01:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7dab2b0b-4ef2-4feb-8280-848445b97455.json and https://artists.proofprofile.net/proofs/artist/7dab2b0b-4ef2-4feb-8280-848445b97455.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 0x93768cf31fa9ae0af283788eddf2135a31bc5220dfa80c2044fd6b41288a0130. 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/NLQ7C1900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed2b38d6cd99c49299066aa5548733fb53b8f50f2b442c4bac9882af47f1f96. 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/USA2P2016614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc217100e0ba58420f8380952e8d3a1a13cf71483abd2ff2e318560c219c7a30f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPZ921905272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047f6b36b398f16e2aec220872dae9510248d2e0f4841ab5dce92564bbe346e6. 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/USA2P2016624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de402829121c1437e01a9f9c83c8071ee68a4b7b006516a4d3e7887c112f580. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA2P2016626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5913bca74419727d38049b658bb5e6f78b670a83b384b26729d01e9f5d5db6d. 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/USA2P2016627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef2efb6555c9afd96e33e21c0efdab3eba948b6c95422c7d30a590ef2fb1c46. 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/GB6LY1600395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2c451d9805f0bc50bbfd2254dbbdca03da59a237f6d660f7d3a402bde95bb8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/AUDJ01701629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbabd5dd84c86bc85af1935ceb9935d536848d60c37fc83edd67693f19e85b3. 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/GB6LY1600396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cfbf9c8ea48def74effcab961d7f534584b51831cd4f453acec43c95c69f53. 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/DEY470916612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ab0ce02eee6ae911e8d9fb39695d61b22da6a5b7db3a4a78ebe4b09153cbae. 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/DEY470916617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac6f5db79de3ce58f5ce408500b04ca16a4ddd6840b34ccbc0be4ef71b874b0. 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/DEY470916618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0d2913da8e889ccbabfd3ca7d1fdc0fe0f3fad988ed4ed393b8488d8dda3d1. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEY470916616.
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
Synchronized feat. Kathy Diamond (Radio Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d404c9d13b940ef7c4130f7439a49f2e9a9967d420ec1dd353ac47de248947. 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/ATMJ91103501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fd8ab7ff9a2506d25233255a151cb1840a7415dfed5716b4cc51fa6591f118. 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/ATMJ91100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c22630c452185e4e5594af6079c29b1eee4bdc6142035bd3d49fc8ba0873c4. 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/ATMJ91100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f26c22ddd278ff6e319c2df77a5cb61a2b75a7399bc689235fba9b42008dbd. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ATMJ91100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb090c9c8f8fcc9bed09dd852f75f658832843cbb560cf7418b43b29c27a723f6. 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/DEY470934196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9623a9b6fabbf3a810ff3606513bbd8033862096fc620dc768ec99d1211756de. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEY470934197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7cafe4e1e4e76661b51d0a1ba8b9da4e06c4d9e7d51d0e690eb8d5cfb1e05d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEY470934204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207e2092bde881a82f4e10a95dd5da95fbd1a79b837753d07f6ce5076f7e25ab. 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/DEY470919535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e5ca62d67c45a31f4c76d4b7c4337e48199be2ac8a86a98b0f240f2fb14ff7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GB6LY1600372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6156db7a8fbc26698621045b07975038ba46d22213b65dfb56c5a7a2ffc24fc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GB6LY1600374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19fdbe8d2b74c16146ab66585793e6bac2c369e006cd9f9d5ef3590f53772c8. 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/FRX762094922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e98821d21b340dbbd272b81cb7fbd7d9350d2cc36a0e31a2bf154ea715bfac3. 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/FRX762094924.