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 0x5ecc79656f7e0e29901fd834f90684a9656191a0185f63752dfd1940b6affb25. 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/a74e9d5c-2ee2-4f5d-ad75-ce2ea8583e3f.json and https://artists.proofprofile.net/proofs/artist/a74e9d5c-2ee2-4f5d-ad75-ce2ea8583e3f.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 0x4487f0c06eff1065f235c0dac5e4e1bbf78d39d14338d643a66ab20a7d8ef76a. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GRSE11000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd95f0f2def2d7e1c5cb593f7b8266e0b7c8173532253110b43452c98de39a46. 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/GRSE11000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83227dc57f5a392ed6c2df862fcc353b30ab2266c31fa6a90de4ed3ffd7fc415. 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/GRSE11300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e6ca3cd797e5bf7d91a8c71e6214eca4a6197dec787e9a9cc8d1c90bdb847a. 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/UK9FB1500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2024a8db7eae4f494a4c54b93965a305049486bca55f3fb92e579daf23352411. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:36:22Z), 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/UK9FB1500078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9b3456f288add1dd36fce643e22e666499a1cbda2b0bf93bb25851e1077d91. 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/GRSE11300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd3865ae344d0596df3d2cce8a1703687ba34eaaffc6d72e40736e26e4f54e4. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/UK9FB1500083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6e4376aaabf30bf9923593191fcd7712390f3c29a7a2bd3a06e704304ecdda. 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/GRPA11900265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c75a0a53a8ceace5f88b2c0bd6bd175b627f326047840d72b17cb9f97aeb6ff. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:07:47Z), 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/GRPA12000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6e4376aaabf30bf9923593191fcd7712390f3c29a7a2bd3a06e704304ecdda. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GRPA11900265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c75a0a53a8ceace5f88b2c0bd6bd175b627f326047840d72b17cb9f97aeb6ff. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/GRPA12000027.