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 0xca0f65c4ac49d501e483834b8564ec13833618ab52cd5f8913901b8be4338c0a. 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/083a4ef0-df83-4ccc-8b48-37ea9e149c89.json and https://artists.proofprofile.net/proofs/artist/083a4ef0-df83-4ccc-8b48-37ea9e149c89.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 0x040e21e344b279d486a74c0fa5cf416952df64ec576c5a935bb283404a1eabb0. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/LTC221800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cecb1c0588a4bf9a3b36a8af56c594835f5aaa5c3f91ccdb8e21c34bdda392. 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/LTC221900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb301118b19b4c0b7547fa6db455d48d0d8c1c52bc3cf782c9f5ecddf937bcd7c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:56:23Z), 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/LTC221900010.
Kazimieras Likša ir Styginių Kvartetas Kotrynos Bažnyčioje
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad6a851e10f370984bb980f3baa559f1af1a232afd4b50f8ed64454cfe0e91a. 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/LTC222200001.
Kazimieras Likša ir Kamerinis orkestras | Lukiškių kalėjimas 2.0
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12757d39efa94fbd9b2cd24d8de057282b1e8ab2570d37896b48166fc4ca71b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/LTC222400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c80ae5867c3d8d623e6e1f2a7eda88b3d89cc673022dd165e376dd6475e1b0f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:21:14Z), 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/LTC222400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12757d39efa94fbd9b2cd24d8de057282b1e8ab2570d37896b48166fc4ca71b. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/LTC222400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1804b11bcd884eee28207cc726c789066563e87369d2d6a118686821afb8eac2. 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/LTC222300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb97cb70f8f15ca00b35e211ad8469ec91fcf3dd60ff1c7887be3e1ace9e469f. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:10:09Z), 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/LTC222500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c80ae5867c3d8d623e6e1f2a7eda88b3d89cc673022dd165e376dd6475e1b0f. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:37:24Z), 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/LTC222400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b8a166026705075e5659eed4ca45e711487a37eb54ace0602ae6b4d23c287f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/LTC221800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d685f356679e327c3200879ab8071146d28cebadb24298e11dee033bcae44c9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/LTB482300010.