thumb|200px|Stone carving of the goddess Matrona thumb|200px|Stone carving of the goddess Matrona In Celtic mythology, Dea Matrona ('Divine Mother') was the goddess who gives her name to the river Mar
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 0xd5a3d921c5f2f0ad720cdcee5002bb617393c3976fd799e4eaae1e174e72705e. 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/6aeb359c-bed3-4910-a128-b81a99acf35c.json and https://artists.proofprofile.net/proofs/artist/6aeb359c-bed3-4910-a128-b81a99acf35c.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 0xfd9e32e56ebae257a875452f082677af18937a78511e6c89c0df70c41373ee48. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:44:55Z), 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/UKLPG1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e0c19e12a2fbedb11fcc92f6349c49469bceef6dbfa84d0b519f60989fd907. 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/IETMT2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f642f2b75373e5d5fa9e4bdab6e8e6a8c1319ccff1361d8cbb34c62017503c. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:57:10Z), 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/UKLPG2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca97d261785da425eafb0d509e84c82513a425f8c651602d321d32b9867194dc. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/UKLPG2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0d069bb03bef22708f46bb7905fc11da7b7fc68ba2cbcafe621d5c10274f4f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/UKLPG2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8facda15239ab003f1e04a631e33788a7ea08683e463a11d46e1ac2a97d319fc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UKLPG2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3a9104c7e6315e6a33c29267dcaaa12863930eaced94f5efbca489b627783a. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/UKLPG2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d519ea1e01b970765f0f8cf7f264285781f28488ed1609b053a3b427435be1c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:58:46Z), 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/UKLPG2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3c73141d6aabb8ec413e1890121725b25305ea45ced236cdbdfbf50301cd82. 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/UKLPG2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6131404ab0fa0795f70f6cf7a8473e0684881f60569d1be290f1fc2de5f1bd. 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/IEAZG2200033.