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 0x5ca6bb9531bb1c52e38bdbf5fc8e7d2d967d6f0676198f44f8cc24f52b34f8f7. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a001ffdc-a80c-4fd5-b58b-81dc33c0c0ac.json and https://artists.proofprofile.net/proofs/artist/a001ffdc-a80c-4fd5-b58b-81dc33c0c0ac.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 0xe1034ff8d497b2a3322283bbdc550dfa0f28339f7bce0f1754ffc6961dc8807f. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/TCAEQ2031614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde2a6953cb18417cf98c74b34d2667bc2c9cff1ba4028b3ed670802eac0556a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:11:29Z), 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/TCAEQ2031649.
Zrodili Ša Terky / Nedaleko Od Prešova, Prešova
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c01596beefa43c25098e645c67533570adae25661827ff61619c854fff7448. 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/TCAEQ2031673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb050552b13110f4bdd577be654c6099be4cf6b012256ae4d1c3da116f0ed971. 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/TCAEQ2031693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c75baf3760cec45e8c492fbdee7458cfc0fb42768b9ef2f9073d3f90bacb537. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:10:35Z), 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/TCAEQ2031709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee52204696f38ec13b6e23dec0b80b0ee30f259ca1bbea4875e1089be57f4721. 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/TCAEQ2031735.
Ej, Špyvam Sobi, Špyvam / Hora, Hora, Paperjova
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283b4bd8c23ec40cf207451d89f3856b61d247e099e5bc0b4170a868854ab94c. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/TCAEQ2031751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb496f7d0a2b2bc0f9907052304aa79cfdd099e3f6e796d1307d684dcd25439ca. 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/TCAEQ2031772.