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 0xfa63f82ffa5a67215aa475dc26a0470a675f267541d4750163e036b0c0abfb64. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8dede36-e69e-4866-b763-ab0ab7e77c9b.json and https://artists.proofprofile.net/proofs/artist/d8dede36-e69e-4866-b763-ab0ab7e77c9b.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 0x26499bad688328af1ae841d9d36d1658f46472183df1a21e61e3891d2f63cccb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLE711900317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1424d523472587f26b9dee4f6a5bf7ad32d0e783dc984b4d771565c773000bbf. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:52:42Z), 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/UKDNY1901108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ddd9544d597f5231175a46ac183e3ea66f6a3922569ae61d3fc1aa27a353c0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:40:14Z), 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/GBSMU7307296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658e8b933670f8921b504d6684fd981e3a6610533ffdc5913876c2f4ca051f8e. 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/GBSMU8934558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac505c8bb6ae44d6e380c03e89fdf0c569ffabe6455f9c029aafa0f0c2969a15. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLE712100290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90faacace655ab0af2131d4b33e7127d9c0e8312f01567be30752c83bafcb82. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/NL2QC2100171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf020b591bb4cb7a67432bf0ec787bf379fce940fa67fa4d39a93edac0ee6804a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLYK92100138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b05a562cd3dfa5b5241938adfa3e918f8ebea4934a2fb203419fc2391e125d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:51:27Z), 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/SE6XY2593067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9a46229cf63ea8b3b203a0e94d93845134ea2beeef97e055f840a580abaf57. 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/SE6XY2592945.