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 0xfe90636387088008bf5e5e3fa5a5c44678270a1208f3729dd9c8067d00a93df5. 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/fd3f82e7-419a-48ea-ab37-e62d80927d71.json and https://artists.proofprofile.net/proofs/artist/fd3f82e7-419a-48ea-ab37-e62d80927d71.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 0x2c87ed5d1996d793b12e3ec1004a54ef2840335ca90d2b1e1e2605535679ffac. 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/PLA811200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3296f0c14798210fab5e5fdc032e1b464f66ebe936d5f5233f835a00bad33a. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:59:03Z), 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/PLA811200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bdc34bb88fe27878d3a761c258a914e6291b1bf1887c5e4d847a1c5b5d2bb4. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:17:07Z), 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/PLA811200089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa36abc4ca2231c49bf16982addb11be44199a6d18a6588dec3f24be06679f6. 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/PLA811400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b25561a14d4e495669b3f9b7210797416f7eb856bef7c82c6619886ea308d4c. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:24:29Z), 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/PLA811400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35886afe93212b27fdda2e4a04a3e0f0d42e04924d831ec0018bcb1e4d7a4360. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:52:30Z), 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/PLA812000063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd276f4a0d12bb33b0edbd5066e233131c5f39e0f805153e36453e1654dd2865. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:29:12Z), 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/PLA811900319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766eb5b12787cb489bbe3837f457d407d97b819dad030158f6f67d29e53d6865. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/PLA812000059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8c57efe240b8191cc050f3f5306808e9281ca592e2f05f735581aa80ef04c9. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:40:25Z), 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/PLA812000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0ba4f49866b485394753957e34231e6a0deb3bed0722a5acd2423ef64bfabe. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/PLA812200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc7cbdec0cf2e226cd27f6fc37d7976e22fe0e3ebf59014a14784b45452ef01. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PLA812300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0cc461ace967eab9bb58a5ff12b097562dadce2805eb69b8ee36f4c8a77028. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/PLA812300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd609c648b24dd712f1a40b33dcc02bf15472dc6a34715fcf99228424516e0e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PLA812300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3eece9d75d8d77ec4d74305ed5c1e66528520441daada9b276a7c14497d748. 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/PLA812300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c50650685754682b9d620f3f1f9269d3572aaa1157884a83c0661254f9a7c9. 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/PLA812300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760312d86551024d9403c3640e14c948da6a7688c8660f566ec78bed03668740. 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/PLA812400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3663620332d9e0207747cc79d1ddc0edef50b70b35bffb6bced54c8cd97580. 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/PLA812400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953f95ec93da21e906d1656e5f64e66c56ca41f7e2c8d8efe984a52e05735da0. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/PLD111400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65038602fe7d6884524c090daeb886812f5afcde1069cce0801e0dc6f19110b9. 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/PL22G2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a7f133a332ec03cc5e5306474082040eeed09da48da0eb7ebd20de987f6b90. 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/PLA550700506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8de84aac23583d1a856a43db3f42656dbe4cc5e5baadcbcb15abaa77df05e5a. 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/PLA391715402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cb2d2d652fbdd75f5a73b44b5747568f402bbb1e47ac496b2529eab0cf9175. 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/PLA391715413.
Grzegorz Ciechowski - Spotkanie z Legendą
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e05a39c594894905fc4376494cb42ddc2838cc8fcddbb0f1660e8b5d9b385a. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/PLA391593207.
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