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 0x809c45114d2de06b39a8e91096295d0a5650426d6ec0d9f82d62e8e2d4f37c10. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ebb2e73-1dca-48ea-b439-aea197cdff52.json and https://artists.proofprofile.net/proofs/artist/8ebb2e73-1dca-48ea-b439-aea197cdff52.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 0xae461b8f33cb2baf04740e61301f1870439a3012b6284a9552646d630449b721. 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/NOCVC2484100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbe45be66f51855f693ded4ac43c84c6d88afd0b878c235b647dadd5d39f175. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/NOCVC2484050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0f40ea242f117d44f23505badbe907ae5d18842a74fbde044d1d253b3f78fa. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NOCVC2484080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae14e530e848a55c2cf9b30dd94d92155fa35bb043c190cb03e7db45797e437. 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/NOCVC2484010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696f680bd91b2fca6b757bf0a03d9fa7d3ca109c15d9ea423a5a83e117d5e557. 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/NOCVC2484020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5788d4a583b807c50bab51623629aaebcfe96fd41683c181a91c3048a6562d1. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/NOCVC2484030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e302c3c27654ec6d1630bbb661fd8bb99ff387cbbdee5a5cf5d9206901eac8. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:45:34Z), 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/NOCVC2484040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbe45be66f51855f693ded4ac43c84c6d88afd0b878c235b647dadd5d39f175. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:20:52Z), 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/NOCVC2484050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301fab2b784bdd2f7562e79361faf7e56dbdc40f0dee7759652421db54d0a426. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:11:57Z), 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/NOCVC2484060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf37a301d8d3042c3cda9ebe1a8ec81bd88f168945d22235ee9096e458e455ca. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NOCVC2484070.