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 0x8ff9f782a513ab0c3dcc381935bf3282e05eb19e4777daa3a53fb18932f04eea. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efae2aa8-cb78-4d84-b122-b161e41db8ee.json and https://artists.proofprofile.net/proofs/artist/efae2aa8-cb78-4d84-b122-b161e41db8ee.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 0xea891affad2cb4ee9c31020105c30e7986b14045871c53606fad63369769ebd1. 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/ES71G1844337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99af1ff45ccea01f9c05ae95795df398393104e3509dbc9187737bacd6d1f204. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES71G1844338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f689c7155e0684878da8cf6b9e233f842b9b0547d2f4c18fb523ed5af91f4bd. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ES71G1844339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdc6f606a33da86a2ea3f18a01446a534a29d18d75308bb18c8b57273211793. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/ES71G1844340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421a09a5447193c415fb9afabad914f33c905a6eb3a0553ebeba8c303a15d281. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:47:40Z), 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/ES71G1844341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d99a69210815086c3cac6107aefec95a146b54a57e1d38c8fee55e6063bd754. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ES71G1844343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6588e55c518e1400e8a9421985f0c1a72058c3664d66ba6ffef397c43b9cd77. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:23:05Z), 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/ES71G1844345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f7cd4dc3a41dd786f173ae722db268ba05d84ab3774f9ef7a163beaeb71761. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ES71G1844347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e621c171f368f026c133028cf6013bdd88f13b4035bb728106ac65ad6884b6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USL4R2456162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fc7f1e1b6bb0ae22e29be672802c01b38e2add5c3765e267ff6722db4b5078. 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/USL4R2456163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c453975a1bbbc35c79bf15ee9763fa17fef4609a8e4e62631a83e3de2882531. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:36:37Z), 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/USL4R2456169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1054de0097f2a729bc126cb472622f1af802de262f086677b8742500d7d73b53. 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/USHM81798418.