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 0x695e160cc8c4969be75dbb7da62fd334cd4a9ffac23468164d5d1110b93e13b9. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/291ae12f-4e72-4c94-a1c7-5cf844bb0ea8.json and https://artists.proofprofile.net/proofs/artist/291ae12f-4e72-4c94-a1c7-5cf844bb0ea8.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 0x15012c78dd758bd1ff240b89ed43139f2bea83c08815b35d6f55fc0fd78eb8ae. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZDA42372212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf5db32eae41a1ab78ce78d335ef3e83b4430073f6a306b1f8349fefe8e8e96. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZK6N2340005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139fb39cf0a44bd24a3c6862c0c338ff49230659bc471dd1581a42565012ba20. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWS2384392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7184b8a8c916432ede14dd110b58952002bdef2acc0746a911c047eed45447f. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZNWX2473676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bfe428e3cdaed9530e8710945524ab1fb01ebe7fd3e96c639853770289f771. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTBA2486604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb978588c45ad488cd8b5e41b6de89b330b5201cd6831ab1a625430f78cbdacaa. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USBGG2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf664e1e5230dd33b31133e7e7af3dd0482099f73c2eb6b3289a7a7958b76a375. 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/USBGG2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e31df16ef3168f2c7f5eb22117941cd0ea74083e72a55e5c1636ad69b39b744. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:01:59Z), 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/USBGG2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe498fec4c36f097a2c9919cece8765d7968b014188f827582cf8adc42d56e569. 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/USBGG2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa489042de61a943116cb7012c52782a0ce5d51f7e370777d86c4b81d38ace01c. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/USBGG2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b356bbfcb9b88420b46259dee14f481f6c288eecd0981ee4e046892b8b4128. 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/USBGG2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0a490ea3d4a67c2f799efbd1781ad844469f4dac841eb9fce7c8c39fd15e23. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USBGG2500006.