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 0xb9b544efa9a2142ea809fcc758d0f4047d93c72aca1ec49b4a304b82d087f753. 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/85de40d8-54e9-480d-a44d-1cb73b378436.json and https://artists.proofprofile.net/proofs/artist/85de40d8-54e9-480d-a44d-1cb73b378436.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 0x3a9bfc729f8fdb42e7ebb3aa03ca3c779605ad6d2f9eb10415f2acbc8b8926d1. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZNWW2092922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9288dfa2bbd1a15403e2ad279822555cd4e89f260d441dc9478ade4ac278f04. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWT2065301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2032fde45bf91b2f4b3d93bc74cf73495fd20c6262aacca6451ed0754e986fc. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZNWW2092923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653f7e74c2e48420caea8f37b86bdc5b584e0c774bfdf570f4489aeebe26a400. 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/QZNWW2092924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd4bc9b5a0c11d60f2d60f135869caaede0b2dd597182dca6c04a5b7888e498. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZNWW2092925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13454f9439216d86d3afb749d7fa175780498c1c87f9d8244eec431d71e22b8e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZNWW2092927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8ff2898cc9043c467f64a78ba947af01437a433d9c42772eadc821f4a630a2. 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/QZNWW2092928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07715715c9448cd9c22c56666d7e3f1a2bd9d4c59d50d66b5e6315bd317a597. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:03:45Z), 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/QZNWW2092930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554f5bfba0f66ae663f64d6bbbaf5eaed18953a3b4a40f40751baca7aa43d896. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:52:52Z), 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/QZK6L2226635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7cc9773d4aff3a85dd92a6ac0108d6614eded485242637828c4ca61ace4538. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:20:50Z), 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/QZRP42283548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6db3abd1ae73703bcc040368f163d6e28dfa7710ec1a94a88a8f70896d6576. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZK6M2248386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7e3c22414554fdaf555d1b46aa60b31c4f3a416432063fa0e4b32f5bd0153e. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USHM92285838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554f5bfba0f66ae663f64d6bbbaf5eaed18953a3b4a40f40751baca7aa43d896. 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/QZK6L2226635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8a18075b73ce2b90cc836ac4d25740910d78acb5a20185bf96c40e64163cdc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM92285840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afaa8c512e74bdab8b63f694f6ad8010500ea51257d0b29967f7c2bdeb87ff0. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USHM92285841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7cc9773d4aff3a85dd92a6ac0108d6614eded485242637828c4ca61ace4538. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZRP42283548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a25336d6ef793b3f4788f47b2cf74273d8f30cc605f4ce31b8830622bd8dbd. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:11:28Z), 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/QZMER2477800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06304fc44b4b7cf4127b302f7b2c0c7119296b17bef7fc2b8505718411b709b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ762437648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc551a06c3934971414681b10ff85a4a08405f4f5c6b2f0fd7c66d4ce9feab7d2. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:02:09Z), 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/QZDA52535231.