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 0xde053eabbdca6c7263beb599b5fd49746bde204f823d660f386ca943c31e7361. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e37fea8f-b945-47c4-8cdc-0d36d4b4393f.json and https://artists.proofprofile.net/proofs/artist/e37fea8f-b945-47c4-8cdc-0d36d4b4393f.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 0xfc3ead3e224cef15963eace8aa1628ee30adaadac60d1e92537326c2c8499b0a. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:52:35Z), 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/GBWUL2565465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520b41d8f8345e07b6d7e8772a6074579e3fd4ce70e901891c96e2ecda9a7a2a. 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/GBWUL2565486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c78eb603d7b5fcf2a6848159377561936d1d605ac61fa24b6e46518cd2eae73. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBWUL2566032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff15b192348071a2021a48a18a6e8059c0a2a09e9eb02f5f561c21a05dc264a8. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:13:24Z), 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/GBWUL2566036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644f167bb2eefef533c52c21c1363a9d278770187b94b4eb9fb3ddada856cc61. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBWUL2566038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474b1fd641f37416c834164885591c70a6b75b196bb0ea32ed7c31abf4df1cca. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:47:09Z), 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/GBWUL2566039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23f568747dadb1a87d5fde7ebd87e7f79b47b01daf92964d12ca3154fbad99e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:58:28Z), 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/GBWUL2566040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90639a22eb4e2ff88e76924057c69ae3b7ec47d10fbe6feb275d567ecfda6367. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/GBRKQ2567537.