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 0xabd1a482dd80c2a9a6233d06fe6384386e5d3867b36491f1eea254d39c3213be. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da3de385-3a3a-4da6-a8b5-de831727cf03.json and https://artists.proofprofile.net/proofs/artist/da3de385-3a3a-4da6-a8b5-de831727cf03.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 0x95101d825a4b2a405970b6fa956be3bf4c77b8b5d250c30a253ab46e40336423. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:58:25Z), 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/QZK6J2511388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584ee0f58d626b4661b62a82945164076ac4e774e2db21191c83a7ece3359491. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6J2511389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04ac68fc16e5d724af114f18667726b6452294947ab78f9deb02285ae2f4a6a. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6J2511390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1c01a92fc359d5c008af4cb70f1eb37c9446df3cbd08118544903b01b78fea. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:58:30Z), 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/QZK6J2511392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045f4eb2ad6f4067477f8e8d5ab52054493d8ecb9136097fc329350df1b4c8bc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:01:44Z), 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/QZK6J2511394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cf70c420a6b32223d533a6f3032be5a05751c7aea724bd9d4a52ac0aa46143. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZK6J2511395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8ad92705ec306ba417e36cf7c51605a8b2cd4ffebe6e08dbcdd972ce08eafd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWS2515042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28446d501f079f06dccf918fa7811a9a0559338ed451a8875e449217eb014cd9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6G2573174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681251ff6a21395993e13bf7a7bbfaf76faf2cb2a9f31a11752ee6bf5a67f18d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWS2515044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedee415de22f34655ffcfc929e0e320f9584d060a024b3352bdfca5405d9979c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWS2515046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8604d04c778defdc630bad12ec256062e64a22e8b9849e6b6766deb063cd4819. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZNWS2515047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bd10f262a46092f9705f1ec292c9fb759d2b54a4c576a183033c61913fb1ab. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWS2515048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bff21db1896b1c3ad8f3b832d702f18e830ef1ea8f30a7f8538d6ada055d931. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWS2515049.