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 0x62fadc45732ac5b6f4692fc30b2e695969f17f82909235722c74000aef462a7b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb47f737-9e76-40ea-a2e4-639f4dcf03e3.json and https://artists.proofprofile.net/proofs/artist/cb47f737-9e76-40ea-a2e4-639f4dcf03e3.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 0x77bd11f22deeb09314174fd4fe3b83e3c9da0650a1dfe1b6f7cb42a1c080d7fd. 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/FRX281986895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccdaaaa0ee417577c60c50c3e859eb416d9fda547a9a8b4eedd8f334862d1cf. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/FRX281986898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895b9e0c2fe5fec13d38600aeb08f5503599b8ecb76874679386b95960f75c5d. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QMFMF2017753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444ab90eabf39929404cc797170bab5156c501dd8d382d95565ddaabc2755650. 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/QMFMF2017754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc1ab66fa116867b4211b60e223a429a49389f221e7f8aca7a4adb380483983. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QMFMF2017755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1d02b3d7bb5c0c43ac18d7f5eb6753d65b13f7976eaa5e2c7deaa3bf0c3dee. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QMFMF2017756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf64a533a9cf7be8389d0bf9ccc8791c051ca5132789e52fef4d3d9ad408170. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QMFMF2017757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed3a314656abb8be57d022f46c53bf57b67d27f2a1ea164493d0806e9b10411. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QMFMF2017758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ff577488c0ec0d7c1bd2921619ecd06186d697b000b48f5612130aeb61e121. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:50:36Z), 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/QMFMF2017760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f14284e90aa28a6f4a0609d11485e808eb064a6eed05749b6fdfac05025dee. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QMFMF2017761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876ff0ac49a50c5ca21c17e707824b2d8ee32dd5911d085e95f9ac64599becfb. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:32:37Z), 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/QMFMF2017763.