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 0x0e48da8f7f907b97853e76c28e3a0421b28a19e0ffbd4b591b7d3212ac08e320. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e68a92f-0ced-4db5-9504-91dff048900a.json and https://artists.proofprofile.net/proofs/artist/1e68a92f-0ced-4db5-9504-91dff048900a.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 0x6db6ce46da6931599e155b8aad7c45b3013f6053bf688270a14bcfe5fca469c5. 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/QZK6G2319866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e43afdf6d3d6c76176f4fac91ba94a359879ce293f29d192f7b9f7c874dd92. 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/QZNWT2394285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafcfb3d688af60c9f858eb6fb6c42327e70bcb492e063625a237d26e8fa5761. 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/BKJ482400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bbdec5c6d6b77f17c7ffd07cb9548e6d8f3fc0a20d3ce2044a0a1b672edcad. 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/QZNJW2409414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfeb4cc8aaff7e3a427b9496dadb5432c090f7e905ee29022d3bd7e8078e741. 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/BKJ482400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf286435c160afb4d4166b3b150f7f4a7497902f8da4a9b551dba22bf60699d32. 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/BKJ482400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f70d5212f3494d89ab9a1e17f9299e611748f21cefc9bdbd94c26aa1e06528. 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/QZNJX2414126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bbdec5c6d6b77f17c7ffd07cb9548e6d8f3fc0a20d3ce2044a0a1b672edcad. 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/QZNJW2409414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafcfb3d688af60c9f858eb6fb6c42327e70bcb492e063625a237d26e8fa5761. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BKJ482400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e43afdf6d3d6c76176f4fac91ba94a359879ce293f29d192f7b9f7c874dd92. 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/QZNWT2394285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5625ebaf39c47daef22394840efaea87d528746a035ea7d68bc9cf0d0464aa53. 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/QZES92326028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71379e33371ec332e663b2f352f5867fd20ee6b0e2d389859a50c68fbad68d2. 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/QZTAS2245432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0731b2f7ab74c9fe894c1d74aa5f6c13f6e531f65cb32602d08a6fd4b15b6d0. 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/QZNWV2297831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce91bab1fe631cdcd89803326f8320a94056aa331c6102c831f14ad986fb2e2. 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/QZMEQ2299640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dc1430797d866f0dce4a5a1c0324d618c5eb93ee738fa703f93bc21d7b403a. 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/QZNWY2161877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddece8df085f856645f440c1c9d57aeb878c1e7898e3a09b09aa820ef85869d. 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/QZNWZ2084515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f47dfe85eb196fbee8688df035cf7928afe41f699550d7e8bb1b8a2c0e942e7. 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/QZMEP2017784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8572086912c424b0fdbf495682165317487769c98fa9dfd5af83e35395b510. 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/BXQGQ2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fedaa09fea8d974735cd0460074263180965c031289c41eca0d6ff9809f5caf. 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/QZK6M2095385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c94a60722d263dcdb602905454b027875b19d29ccecc5309c2af014748e965. 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/QZHNB2075959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2709509afcdc82253b17b587d8102295cdb18c7625a8ba944c6e9af6b1f319c6. 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/QZHN82052678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d74c88ce5397537f27f001396b99cc509700cae65f0a921b7ca5a3a33734e38. 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/QZHN62046753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12cabc0c5956cb15eac82968b332ee9f3056970d56de119aed994152bdd855f. 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/QZES92077617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b4b18bd24ccbf2b5914326207188336b91bbb7fc905bc2607ac9c8c98f72c5. 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/QZES72089484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ffd22506f733d79258fa7fd990570eb0bd087575d77a1a15856f7de238f41f. 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/BKJ482500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a2eff9a073c5cd98a283297c9a5e3e15bc4a963cf673883f2eb6bb99cb1c9b. 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/BKJ482500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99478eed6eea038bb3dda763475ac5bfa307f57d5f05ee5cea2b36cb509128ca. 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/QZGLS2529210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198d54ffa604d6ee29331aa65037aac41a5058883dc8f744b82d7f789ff27cfb. 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/BKJ482500001.