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 0xc9720a6fec5974eaca6f92b0d50ac767d82abf4becaaf1d8a46069c7b64c5432. 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/9b2aff8d-f66c-4e01-82d9-d58199c6eed2.json and https://artists.proofprofile.net/proofs/artist/9b2aff8d-f66c-4e01-82d9-d58199c6eed2.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 0xbfefe02d2650e3054c19cc3ff303ad687dd162840307284cd2de07af9be66b08. 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/SEYOK2318746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4c26c98cf1a58e989c175d36bb9c771da3575cfc9009a90c78592b8aaf8a97. 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/SEYOK2313639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696d3197ec490fdff803584be86803a3fd3f701c8646edc2e8c7a0df853439d5. 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/SEYOK2311943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fcbbf01232a86263c4ee6327c693bf4ff3497404b80ef268addcbebfe73400. 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/SEYOK2318747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5736d21b63399cdce49f5511eb7d3fba819977fb137c8cfb8cb128ef30fc2484. 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/SEYOK2318748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ea93d15743c676408f06a5942caf1f40ab90d3fbe9bcb813af83eda0a57c5d. 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/SEYOK2318749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0f499055d2c6496fec053b3274f949c84735e78fb6908ecb8903e506b23d4a. 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/SEYOK2318750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7943f2e217156c06764ff62f33ed071c24b355c01a64b7e5e256c7e03ecd55. 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/SEYOK1810470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3b9a621a5088d4b3b3301da9d9d9a226111c3526d603b2797d0a76c73ba4f2. 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/SEYOK1810471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284e3f278b1b8e775ec1ba547d21df0fe89929afa4871327826e8d8f0cdc08e2. 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/SEYOK1810472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07280e037c1229da4eb71e208169785d49e0c97cf42ace258f445e927e1f948a. 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/SEYOK1810473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefb98645a40f42664124b0aac6653591d9033ad87ebd9a9571a0a06f0f1df49. 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/SEYOK1810474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7d6c13b2873e1a24d4138ce78e9d08759daeb1b38d3ea873955f37c3106626. 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/SEYOK1810475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c9069348d855097eda7263bfd2bef50bc69ad626f9f9c95deeb4ee8087b96b. 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/SEYOK1810476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce25f002489affc05d8994f65ceb3c0da20d5a038ba5e348fd708427244e72d. 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/SEYOK1810477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f40cf1e1e75fb3d2ef34bb5aa30d846f29fd61a84beb8349ae1dadc989d0721. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/SEYOK1810478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6812e976706eaa4ba4eca23ab61597cfb9449aee1d15c517fcb7e4e56f352050. 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/SEYOK1313737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4de2f08ddda6a66ec6b7ba238db12edb973fae9572d4762cb6ed582f67f55c0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SEYOK1313738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fec8a761c4398a68ee64cb0dc3bda925a473300c30d0dbd9e1c0694f2a24036. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SEYOK1313739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3483025ed8b12bd2edc8c213f83086a00a5198b1dfea214800c35344ff436d. 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/SEYOK1313740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a978083043939ddda3f71f92b106fb26ae19f26ee0e0bb822832fca5af9d4e. 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/SEYOK1313741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa526713cb8778bd6cf84aef860b344dd9ea469a3285ede0e7e4da687f7da3f5c. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/SEYOK1313742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2af628769a7bf0ad1b3770816b8c4a9583b5ca3a5443f738e46a3ad365e5f94. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/SEYOK1313743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba88937035cb8acb52f00b3fd305f09d2e867d05e2db7ec9fb94c2ecb40a752d. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/SEYOK1313744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1e68ef93233814ce6cc06721d7f36b3f25c786dc2185b7f07739895b1338a1. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/SEYOK1313745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4d4af87192e6b98ac1014a1af22fc4860fe4ca33bf60ed1e0afdc0f874ff94. 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/SEYOK1313746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b6e8ac02d04e872c65db4b6a840aa2beb5dcf5a2a7e92cc0a248938a135110. 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/SEYOK1313747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f4e155591de981f2c559ea5b621c0717654b97f7b2aa659ccf262a84a3ff14. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/SEYOK1313748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d8adc84f8caf4f12a6c10493ec63b4c1da308c20444db9a2a28a0ff06fc539. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/SEYOK1313749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf274060fe18e1a7c12b29b4bb8e9280c1705f91ebfebfd2d4b709cdbaed0991. 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/SEYOK1313750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56284c88c5b0540e8e7fe7a74c64a835a12ad4a78a2b95d2f22314f2b95d298d. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/SEYOK1313751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb712ef612313bd129a2159e5cb1636b070a654b510710ade6e479a9b9c89f2ef. 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/SEYOK1313752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69e11c812053df0f19903de35f0070f12ebd22794b37f40a8621d85097c61c2. 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/SEYOK1317713.