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 0x99adf907b57aa6b6f7a9eed4c448ddacefc1f99b38b0678182dda506d7922d47. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/854b6e78-dbc7-4904-8ed2-9de757201a19.json and https://artists.proofprofile.net/proofs/artist/854b6e78-dbc7-4904-8ed2-9de757201a19.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 0x6b3788faa2403dc533a548996918bc96ff03e469288baec4db14cf10e34bf176. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWU2057350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a1b64b77e3d726dc52449a82f2b167be2968e56da2ce13575d37574bb297e0. 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/QZNWU2057351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca1f50d40c11548f302bbeae324102063b157c44f33812f8df6eaf9abcb2f90. 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/QZNWU2057352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84d6a3871e8e8116162118a1acfb92ffa849f88c20f846115448ffa3c1dd6fc. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZDA72116476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687277b420b354aeeae83b4ff0310e0140753b11de2c6fb8e82327b864b6922a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZDA72116477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5595f880706b0fbcaeb3c4b037caf062b667814eb9cb1f57e2bf9237f0b78bc. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZDA72116478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803fdee27531848067793fa60d1d9840507075ec0a49d17a45478a60ca105659. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZDA72116479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80383b4f7a0abaf7de564d90f7f6e73fb9a4f16141ac37c880f9a95e0f38d6c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDA72116481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f700975f92b9c85ac0daec68ba0b55bd09e9bcade4580c16aca4bd4c818a4de. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZDA72116482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd006891d507572afa956d478d1103c7699c563051666b68b209c595bb99142. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZDA72116483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc79650c756e99e88eb841f1e712f3d83393888e474a4c3b58d2f25e10dfde86. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZDA72116484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae7dbbf1ef9d97e12424960893f65ffa7487194e85b8c9545902fd41af18fe6. 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/QZDA72116485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f942f9326e756c789cfa9c4854a12694654d2f3e7c0a907f13098a477345bbf. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:26:07Z), 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/QZDA72116488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098a3294b8be8d8035fc53e73ee4cc017a511f5323632318559935cf91920c99. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:01:33Z), 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/QZDA72116489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6473ca02fd0f29d51125bae84e1c43a0181616d0b5b70729055f468c17609f6c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/HUA612405257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0606e0e32f67d19013a706508f201525dbd7f3a37465370be862b7623aa142. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/HUA612405258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c8288655e69a833ce79a50e3fd262b977c187b2883a84b102aef703cd8e086. 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/HUA612405260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875172726ce5bba817ef0bb4db2dd9faf1a33bb03304af06c0dbe6c8816c9762. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/HUA612405261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cbe9e601dda1198e43a97e70ecbce53f6c54261eff0b2b98e6342d497b491d. 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/HUA612405262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519c630a17740e3509eee073c7926ad3329f9f25856aa846dee620865c399f51. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/HUA612405263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4025be92c53bf9d4cd92b3baec480a0b90a9cfc6194c58202ba91f1755a05f33. 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/HUA612405264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09dde3362a50f6640a89f27392ccd825496206c76793a3de889da9e54bb2ce1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/HUA612405265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc0c8fb0351f4a65e893ec8edca938af2c73527e135316664e0303c8f004f7a. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/HUA612405266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918be1902ba125c6a2ef4f47553b58e70e3f750d5919d4fe715bf2a06a346d07. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HUA612405268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9110a36b2fb4c6a7c872d6356cc18b2b2ec6ea811a44aac13773d7b59eec1f9b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:32:42Z), 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/HUA612405270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68ea4366f3d2f9632443075f58c32c9a24b256d46b8b3f9ffbba65fdfc1c430. 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/HUUM72200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f35c88db924fc81f3bea83066723fe0e7488f3665dee8055aef6387965a216. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA42288475.