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 0xa17ecd8795a118cc0643c0194973ff7bbda381e93ded33e029c34639e5f8c7a5. 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/070d2e58-151d-4334-b113-3a4aa125c256.json and https://artists.proofprofile.net/proofs/artist/070d2e58-151d-4334-b113-3a4aa125c256.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 0xbc6eeac47ec76b02ede47e159a196bf931b3d5834d663bbe5700fb989dd82c52. 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/QZNWU2211362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cbfdbdb68c6ba7ba0da94de7ca7eaa6f3d57f74efaa675bb2fb9d2a2948992. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZNWU2214067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b7b33076ce8245d55d5ef50f792d290c81414d625b352e355fa6cb650f5fb8. 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/QZMER2251478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41c55efe58402dbb6942fa67c9aadd97dd2f80f54875ab12c9b547b17cff8e3. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZNWZ2296814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7a22d39b3611e4324711214c6e1eb55dc8e846da5ab9552213623f820be79b. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZNWZ2296816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65f4135c48a9d5a8f1c561849abd6d2fc520b377bea0aa1b0fae7f01d64832e. 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/QZNWZ2296820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9785261e9228d4df82f9c173d93c8186a747e25a463923db91b1d77a94422fa0. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZNWZ2296823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2572345e109a1355a9482c898fe26e9c0d6a8fbf80dab29c0760a681cb59f3d1. 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/QZK6F2238535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7c98c9f81d162e4d0717b3884b4534a6bea7883d7a9a98e3b55d0af6766000. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:45:54Z), 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/QZK6F2238537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93a8309de0965fe92126093eb49d547abadd65d018dfa697a2eeb346c31af6e. 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/QZMEN2233022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3180e367c93748b559d657fda8102634d0c8326cbe5c0152f214b021a01224. 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/QZMEN2233023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d7f858ff9732a26b1fd982dfdc9e6e1f28a124b5efec82b45cc6e32e099482. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZMEN2233024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa489d496c6bd73ebd79418c0adf0741b3f2d046e470293777a4b142f7fbe1e. 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/QZMEN2233028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d30f9377b81fb8af29e110d52bd66547c23d023e9a7c5279f4edb566fecb570. 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/QZMEN2233029.
Legenda Celor Patru Colturi Ale Blocului
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe8aca3607b46634081f33de781be231f2fad7a4c5d53ac1dad586c9c46e47d. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZK6F2233107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035adf1dc97fc13a1c2ffaca1198a01b0ade37a3fd33284107d7dc8cf5d6325f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZK6F2233108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8df8c4aa4ee47504739c7f94bfd42e1bb87f202004097c42eecad803d4b6670. 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/QZK6F2233110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07c47a9c33350903ccca783af2871d06de43e9aaeef288005fcc5595ffb966a. 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/QZK6G2273927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbbdb3a2563277a79e54bdd154f23f2f9f26a4a0ea53d091a66aad5558516e4. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:39:55Z), 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/QZWFG2419058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf70d42573cc3d4d6011d2c92026718f0bbc100af6227967420a9eb3185b333. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZWFP2461319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bb9181de458432938a3f6286b74ea0b6731116822347c4c6128ed89a4cecc3. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/CAQOI2416578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5176892eb24a9988b43af3234364551c88108bdbb8285e004df5ece80528e8c. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CAQOI2416579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe72169de37ae20302f23040de272069585d919353a81cc243c9f9d0f9ac074. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/CAQOI2416580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908e495204759ff312e60d41baf2a8e44a339f956a321f105de4f00a35344669. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/CAQOI2416582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed5f884dd2d2f5fb086199a91d2e31be216af5574c730e54959bdbc58b7b577. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/CAQOI2416583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae121242f6c9375321e79e9e12b5e614189622206c70469ab54fe78dec130b3. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/CAQOI2416585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5c74ec8df568bef993bd24d890c5b4bb6a1f4841b37327b8f5a5fbf15d8086. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/CAQOI2416587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e60db0d733e47fe2205299c791a5d27739a2a77e3bbd965baa14aaeef21a12. 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/ROGRS2400860.